2022-03-01T03:11:52Z

Car Transmission Problems: What Damage Is Caused by the Transmission? Signs of a Trouble with Your Car's Transmission

Transmission problems happen all the time, and sometimes for no obvious reason. However, it is a real pain and causes more stress than necessary. Most of the time, it is due to poor maintenance and lack of service, but transmission problems can occur due to external factors such as faults or things that are beyond your control.

Not all transmission are perfect and you shouldn't expect them to be, but when you have problems it's best to deal with them as quickly as possible, otherwise you risk serious damage to your device. Your transmission may cause a failure. It's the last thing you want to get your hands on because repair or replacement can cost a hefty price. So here's our guide to transmission problems to help you resolve whatever issues you're having trouble.

Common car transmission problems

Low liquid content and leaks:

Low fluid levels and leaks are the most common causes of transmission problems. Leaks are usually caused by a fault with the transmission itself, causing fluid to leak out. Bad bolts and gaskets, broken fluid lines or a vacuum hose, damaged gaskets, or a bad driveshaft can all cause leaks, resulting in low fluid levels.

Here we show you how to check and add liquid. A transmission requires the correct amount of fluid to run smoothly, and not enough can result in insufficient cooling and hydraulic pressure loading. In cases like these, it is suggested to find the underlying cause of the leak and stop it immediately.

Here is our helpful guide on how to fix a leak. Once the leak has been located and stopped, a fluid change should be performed. To see if it really is a leak that is causing weak fluids, check your intake and under the car for signs.

Burnt liquid:

Burnt fluid is usually the result of debris or other unwanted contaminants in the fluid, causing ineffective transmission lubrication and cooling. It can also be due to overheating or the wrong type of fluid. There is a very distinctive odor to burnt fluid, and you can notice it right away in normal, clean fluid.

The new liquid is bright red and smells slightly sweet. If it's dark (black or dark brown) and the odors are burned off, it may be time for service. Allowing the fluid to continue to run in this state will eventually cause a buildup of sludge and debris, in which case transmission problems or breakdowns are likely to occur. A fluid change with a new filter or transmission flush is recommended.

Torque converter:

While manual transmissions use the clutch to connect the engine to the transmission, automatic transmissions use a torque converter, which is a fluid coupling that allows the engine to run on its own independent of the transmission by pressurizing the transmission fluid. . But torque converters can develop transmission problems, the most common being needle bearings.

Needle bearings separate the stator, turbine, impeller and converter housing and fail more often than any other part of the torque converter. Damaged needle bearings often cause the transmission to make strange noises when driving, as it allows metal-to-metal contact between other converter components, creating metal shavings that the transmission fluid picks up and moves around the transmission. transmission.

Other problems can include damaged gaskets, worn torque converter clutches, or a bad torque converter clutch solenoid. Service and repair is often your only option when experiencing torque converter problems.

Solenoid problems:

The solenoid is the part of your car that controls the flow of fluid through the transmission. This electro-hydraulic valve can be damaged due to insufficient fluid levels or electronic problems causing uneven fluid flow. This can cause a variety of transmission problems.

If you're having trouble slipping or shifting and have checked for low fluids and leaks, the solenoid would be your next culprit. If it is an electrical problem with your solenoid, your car's check engine light may go out and the most common problem with solenoids is that the wires that connected it to the car's computer were damaged. You can quickly diagnose if it's the solenoid by connecting a scanner to the car's computer.

Clutch problems:

A manual transmission can sometimes develop a problem known as a slipping clutch, in which the clutch disc does not disengage the flywheel when the clutch pedal is depressed. This can be very dangerous as gears can be difficult due to the clutch always turning with the engine. A dragging clutch is often accompanied by a grinding noise when trying to shift gears, and is a great indicator that your clutch has a problem. However, obtaining this solution is usually cheaper for manuals than for PLCs, and the most common cause of this phenomenon is due to the clutch pedal being too weak. This makes the clutch disc impossible to disengage from the flywheel.

But manual transmissions aren't the only ones with a clutch, automatics have them too and they're located throughout the transmission as well as the torque converter assembly. The bad news is that it can sometimes jam or break with friction, causing slippage or the wrong amount of fluid pressure to be dispersed. This can cause a number of transmission problems including shuddering, high heat levels, and gear shifting issues. Clutch problems are also more difficult to repair on PLCs than manuals.

Noises, tremors or strange noises:

If you experience any strange behavior with your car, such as jerking, jerking, or noises that you have never heard before, it may indicate transmission problems. However, the difficult part is identifying the cause. With a manual transmission, the problem could be any clutches, gear synchronizers, or synchronizers that are worn or damaged.

You will often notice a problem if you hear strange noises (buzzing, buzzing, or groaning) or if you have problems with gears being out of phase. For automatic transmissions, you will usually encounter trouble changing gears or, more often, jerking the vehicle. The best course of action in these cases is to identify the problem as early as possible and fix it before it gets worse. You should have your car's computer checked for error codes and there are several places that will do this for free.

Check Engine Light:

It can be scary when your check engine light comes on. What could be the problem? How much will it cost to fix it? He has a lot of questions on his mind, but many times he turns it into a bigger problem. While the light can go out for a variety of reasons, it can also indicate transmission issues, which is why it made our list.

If the light goes out, you should know what the problem is right away. There are sensors throughout the car that will alert the computer to any signs of unusual activity, so if you have a scanner it's as easy as connecting it to your car's computer to diagnose the problem. So it's up to you whether you want to fix it yourself or take it to the store. Problems are usually not too serious and you can fix them yourself (a common problem is a worn sensor) and replacing the faulty part will fix the problem.

Transmission slip

Slips are a common problem but can be dangerous on the road. Most often it is caused by low fluid levels or a faulty solenoid, but worn gears, clutches and belts are also suspected. If you feel that slipping or changing gears has become more difficult than usual, it could mean that you have transmission problems in your hand.

Low fluid levels are often caused by a leak somewhere, and your job is to find it and plug it. Slippage can also occur due to dirty and contaminated fluid, so check to see if that could be the problem and change it as you go.
Solenoid issues would be your next item to check, and if this part isn't working properly, you'll need to repair or replace it.
Worn gear are a common cause of transmission slippage for manual transmissions and will need to be replaced. When gears are worn or frayed, they don't grip properly, preventing them from slipping.
Drive belts are what connect the gears in an automatic transmission, but if they are worn or damaged, they will not be able to do so. Replacement or adjustment should be a simple process.
Clutch plates have special friction material to help them engage the gears, but they can burn over time. These clutch plates will need to be replaced to prevent slippage.

What Are the Most Common Faults in the Transmission

Carrying out proper system maintenance will prevent major failures.

The transmission system is one of the strongest elements of a vehicle. It does not usually break down normally, however, it is not without danger, especially if proper maintenance is not carried out.

The defects that can arise in the transmission, most of the time come from failures in other vehicle systems, as explained by Ro-Des. For example, excessive use of the clutch, which will cause severe bearing wear; or a failure in the cooling system, which will overheat the transmission system.

The professional mechanic must review the different components of the part, paying attention to their good condition to avoid major breakdowns. The main thing is to change the transmission oil when indicated by the manufacturer, although the most normal thing is to do it every 50,000 kilometers so as not to cause greater harm.

Most common faults

One of the elements to which more attention must be paid is the dust cover of each of the wheels. If when turning, some type of metallic noise is perceived, it is most likely that the anchor has more play, so the joint is worn or poorly greased.

Another of the most well-known faults is that the drive shaft is unbalanced, which will be noticed by the presence of vibrations when the vehicle is moving in a straight line. From Ro-Des they recommend replacing the entire block (bearing plus gasket), a repair whose cost is around 150 euros plus about two hours of labor.

On the other hand, whether there is buzzing when stopping or accelerating, or system stability fails, it is most likely due to a problem with the differential. Normally it will be due to excessive wear of the bearings or a misalignment in the differential.

In the case of manual transmissions, maintaining a correct level of gearbox oil is essential to extend the life of the transmission, so it is recommended to replace it every 25,000 kilometers. In the case of automatics, the good condition of the tires is key since in the event of ' aquaplaning ' the transmission can overheat.

5 Signs That Indicate a Problem with the Transmission

Broadly speaking and simplifying things, the transmission system is responsible for getting the force and power of the engine to the wheels, depending on the speed change at which the car moves. Its components include the clutch, the differential, the gearbox, the transmission shaft and subshafts, and the wheels.

There are different types of transmission, depending on the position of the engine (front or rear), the traction (whether the drive wheels are rear, front or four) and whether the gearbox is manual or automatic.

When the transmission is damaged, the symptoms are very evident, although due to the complexity of the system it is almost impossible for us to know exactly where the fault is, what we will notice is that it does not respond correctly when we activate the gearbox.

Taking into account that the elements of the transmission carry out a very heavy job, it is normal that over time or due to lack of maintenance of the vehicle, they begin to show damage. So we must be vigilant and pay attention to the following signs:

The changes do not enter and the lever is hard

When our car has a manual gearbox and we press the clutch, we notice that it is difficult for us to move the lever and the gears do not enter.

It usually happens because the transmission fluid is at very low levels or does not have the proper viscosity; it could also be that the shift cables or the clutch connection are not tight.

Noises when in neutral

For example, when we are waiting for the traffic light to change with the box in neutral and we start to hear noises, it is an obvious sign that something is wrong.

Again the problem is surely in the low level of the transmission fluid, or that some parts have worn out and it is time to change them.

Smell of burning oil

When we notice an unpleasant smell of burning oil, it is most likely that the transmission is overheating. Once again the problem will be in the liquid, either because its levels are low, it is dirty or we are not using the right one for our vehicle.

Changes come out

When we make a gear change and the lever does not stay engaged returning to neutral or remains vibrating while driving, we must urgently check the transmission before we get stranded.

Clutch is stuck

We press the clutch to change gear and we can not because it is hooked and rotates along with the engine. The problem will most likely be that the clutch pedal is loose, or that the joint between the pedal and the disc does not have room to disengage, or that the disc is failing.

What is car transmission?

The transmission system of a vehicle is the set of elements that transfers the power and movement of the engine to the drive wheels.

We can find different configurations depending on the situation of the engine and the driving wheels, but all of them fulfill the same function.

The most frequent configuration in Spain is the front engine with front wheel drive (FWD). In smaller numbers we find front motors with transmission to the rear wheels (RWD) or to the four (AWD, 4WD and 4X4). Even less common is the rear or central motor, which transfers the movement to the rear wheels.

In this post we will tell you what types of systems there are, what are the elements that compose them and what faults and symptoms are more frequent.

What Types of Transmissions Are There?

Depending on the gearbox we can find mainly these types:

Manual Drive Transmission

They have a clutch pedal and a gear stick that the driver uses to change gears. This type of transmission is made up of a set of gears along a pair of axes, called input shaft and output shaft.

With a manual transmission, the driver has to select the proper gear and engage or disengage the clutch. The transmission uses a flywheel, pressure plate, and clutch to engage and disengage the engine.

Robotized or Piloted Manual Transmission

It is a manual transmission with an electronic clutch that is managed from a control unit. Thanks to this it can be used in manual mode or activated automatically without driver intervention.

Double Clutch Transmission

Said system is robotized and consists of two clutches, so that the speed and smoothness of operation are improved. In this case, the actuation of the clutches is totally autonomous and we can choose sequential gear change activated by the driver or automatic.

Automatic Transmission With Torque Converter

Instead of using a clutch to engage and disengage the engine from the gearbox, they keep the transmission engaged at all times using a hydraulic torque converter.

The converter acts as a clutch as well as a gearbox, adjusting torque without the need for driver intervention.

It is the type of traditional automatic system whose beginnings were quite limited but which has managed to evolve.

Variator transmissions

In this case, it dispenses with the clutch and uses a system of pulleys and belts that adjust fully automatically. When accelerating, the primary pulley contracts, causing the belt or chain to go up, while the secondary pulley expands, causing the belt or chain to go down.

Its operation is very smooth and simple for small engines, but somewhat more complex and delicate in powerful engines. This makes it more widespread on mopeds and scooters.

Transmission System Parts

The transmission system is made up of different elements that we detail here:

The Clutch Motor Flywheel Assembly

It performs the coupling and decoupling between the engine and the gearbox to allow gear changing. Depending on the type of transmission, we can find different systems, even those that dispense with said element.

Gearbox

Gear system located between the clutch and the transmission shaft to adjust the speed of rotation according to the needs. It is not necessary in continuous variator or hydraulic torque converter systems.
transmission tree

Rigid shaft that transmits the rotation movement between the gearbox and the differential.

Present in vehicles whose engine is located on the opposite side of the drive axle or in those with four drive wheels.

The Differential

The differential is the coupling system between the bearings of the drive wheels and the transmission shaft. It is responsible for transferring the movement and allowing speed differences between the wheels, necessary for proper operation.

Car Axle

It is the axis that directly connects the differential with the CV joints to transfer the movement to them.

CV Joints

It is the component that is responsible for transferring the rotation of the drive shafts to the drive wheels without preventing the transverse movement of the car's damping.

What are the most common faults?

The most common problems that we can find in transmission and their symptoms are:

1.- Overheating

If you smell burning oil, the transmission may be overheating. That could be because the fluid levels are low, because it's dirty, or because it's not the right one for that transmission.

If you find oil marks under the car it could be caused by transmission fluid leaks.

2.- Problems with the change

It may happen that at the moment of pressing the clutch pedal, the gears do not engage. This could be caused by a misalignment in the shift cables or clutch linkage, or by the transmission fluid not having the required viscosity or level.

Another shift-related symptom that indicates problems with this system is skipping gears. That is, if when you put a gear it returns to neutral by itself.

3.- Noises or Tremors

If there is a screeching noise when changing gears or the car shakes in the case of automatics, it is very possible that it is a problem with a component in the transmission.

Once again it may be because of a lack of fluid or because it needs to be replaced. Another possibility is that some mechanical part is worn out and needs replacement.

4.- The clutch is engaged.

If you press the clutch pedal to change gear and you see that you cannot because the clutch is stuck, there may be a fault with the discs or the connection cables.

5.- Engine failure warning light.

The engine fault or check engine light on the dash can also come on with problems stemming from the transmission system.

Transmission system maintenance and breakdowns

Good maintenance and proper use of the transmission system of our car will significantly increase its useful life.

The transmission system of the vehicle, as we showed previously, has the function of sending the power of the engine to the driving wheels of the car so that it works. We can divide them mainly into two classes: automatic or manual transmissions based on the gearbox they have installed.

Whatever it is, as a general rule, it is a strong and robust system that does not usually give failures as long as it is properly maintained so that the operating conditions are optimal. However, the passage of time and the number of kilometers always lead to especially notable wear on its moving parts.

The joints and transmission shafts, being more unprotected, can seize, so special attention must be paid to them during revisions. When faults accumulate, replacing the vehicle's transmission is a relatively simple task as the different elements are joined together as a single piece, since the cost is usually similar and it is more reliable to replace the whole than each element separately.

Among the best tips we can follow to extend its useful life and not face this situation are:

Change the transmission oil according to the instructions in the maintenance book dictated by the manufacturer; approximately every 50,000 kilometers.

In order not to precipitate wear and subject the transmission to great efforts, the ideal is never to overload the vehicle and keep the tires in good condition, always using similar and well-calibrated wheels.

Preventing transmission overheating is made possible by a well-functioning cooling system. Don't forget to keep it sharp.

Before a manual transmission, we will try not to abuse the clutch so that it wears out the bearings excessively, although when we use it it is necessary to always step on it to avoid creaks or force the system. It is also necessary to check the condition of the gearbox oil, replacing it every 25,000 km.

If, on the other hand, the transmission is automatic, we will try to be cautious about possible skids on mud or cases of aquaplaning, which produce a dangerous overheating of the system. Nor should we be in gear with the vehicle stopped for a long time so that the oil temperature does not rise.

These tips, as well as the information that we offer you about transmission system breakdowns, are never intended to replace the work of a professional, but rather to get closer to better understand the operation of our vehicle, therefore, when we feel that the transmission slips or presents large irregularities, the ideal is to go immediately to a trusted workshop so that the problem does not worsen.

Most common failures of the transmission system

Detecting a fault in the transmission system in time can be key to the useful life of our car, therefore, we are going to indicate a few small guidelines that help us recognize that the vehicle's transmission is failing :

If we hear a metallic noise when we turn to change direction, it is likely that the joint on that side is worn and now the anchor has play and should be replaced. In the annual periodic revisions of this system it is advisable to check the state of the dust covers, since it depends on them that the joints are kept clean and well greased. Replacing them can cost around 20 euros plus an hour of labor.

If we feel the vibrations when we go in a straight line, especially when we accelerate or decelerate abruptly, it is likely that we are facing a case of imbalance of the drive shaft, also called the transmission half-shaft. As we mentioned at the beginning, the cost of replacing the gasket or the bearing is very similar, so it is preferable to change the entire block. The cost will range from 150 euros onwards and usually no more than two hours of labor, since they are pre-assembled.

These two cases are more common when it comes to rear-wheel drive vehicles.

In general, the hums when stopping the vehicle or when accelerating, as well as a lack of stability in the system, denote problems in the differential, either because the bearings have worn out or because the differential assembly has become out of adjustment, so we should not hesitate to go to our mechanic.

On the other hand, if we look at the gearbox, when it is automatic, if we see that it slips in all gears or it is difficult for it to accelerate, the ideal is to check if the oil level is below the minimum and replace it.

What faults tell you that your car's automatic transmission is about to break down

The automatic transmission is in charge of making the speed changes according to the speed with which the car advances.

Like the engine, the automatic transmission is vital for the car to function properly, it must be properly maintained and taken care of so that it does not break down.

Repairing damage to an automatic transmission is one of the most expensive jobs a car can have, so it is very important to always keep it in optimal condition and know what faults it may have.

So here we've rounded up some of the faults that indicate your car's automatic transmission is about to break down.

1.- Difficulty to change speed.

The problem may lie in work pressures. If the box does not make another change other than the "neutral", the origin of the problem may be, again, in the engine oil and a change must be made.

2.- Does not advance when accelerating

If when accelerating the car does not advance or does it without force, the problem may be caused by low oil levels or that the torque converter is faulty.

3.- Skidding when changing speed

Let's remember that automatic transmissions do the gear changes for us, and that the complexity of their mechanisms arise in solving this problem for drivers. If your automatic vehicle has a similar problem, the engine oil levels may be low or the clutch, valve or Oil Pump may already be badly worn.

4.- Weird sounds when moving forward

This failure can be caused by a lubrication problem, especially in the crossheads. Also, the problem can originate in the wear of the pinion-crown assembly, differential or deteriorated drive pinion.

5.- Drive Shaft

Drive Shaft may be misaligned or out of balance

6.- Hit on the change

When the transmission has to make a gear change, a knock is heard, it is possible that there is play in the transmission assembly or in the differential.

7.- Automatic transmission oil leaks

One of the easiest ways to identify a gearbox that needs attention is when there is a transmission fluid leak. This fluid is vital to its operation, so if you notice oil marks on your patio, be careful.

Automatic transmission fluid is red, bright, clear, and has a sweet smell under normal conditions. If it is in poor condition, it is dark in color and smells burnt.

Transmission slippage symptoms can also be indicative of other unrelated problems

Your transmission may not necessarily be slippery, but you could be experiencing issues in another way. There are many ways your transmission can wear out, and the best thing to do is take your vehicle to a mechanic to have it checked out. The following symptoms are generally symptomatic of a slipping transmission:

There are a few ways your transmission can break like this. Perhaps the most common reason is that your transmission is experiencing low fluid levels. You should check your vehicle's fluid levels on a regular basis. When you check it, note if it is lower than recommended. You may only need to top up the fluids, but if the problem persists then there may be a leak in the system.

Can a faulty transmission cause engine problems?

Read on for some of the most common indicators of transmission problems, and understand that you must have these problems checked immediately, or you may face extremely expensive repairs down the road.

There is no way to accurately predict what will happen when your transmission fails because there are different types of transmission failures. But, if you're driving when it does, chances are your car will stop accelerating.

When your transmission fails, it doesn't transfer rotation from the engine to the wheels of your car. Essentially, your motor will turn but your wheels won't. As long as the brakes work well, chances are you'll survive the ordeal.

If you're afraid your transmission will fail, know that you'll probably be fine, aside from having to buy a repair or a new transmission. If you notice signs or symptoms of transmission slippage or failure, have it checked. Don't take chances.

Risks of driving with a bad transmission

This is necessary to keep your car moving. Transfer the power of your engine to your wheels. But its transmission is much more complicated than that. So are the problems that can arise in it. This makes regular streaming service extremely important to keep you moving.

If you hear rattling, grinding, or annoying noises every time you shift gears, visit a mechanic to have your car repaired immediately. These are all signs that your transmission is failing. This problem can be caused by a number of things, ranging from insufficient transmission fluid to damaged or worn gears. Identifying the type of sound and when in the shifting process it occurs will help your mechanic figure out the problem.

It's time to start thinking about your next fluid change when you start to detect a slight burning smell. Transmission fluid usually has a sweet or sour smell. Transmission fluid keeps all transmission parts lubricated. If your transmission fluid is burned. If that's the case, you might need a complete transmission rebuild.

What happens when the transmission goes wrong

Finding the time in your week to take your car to the mechanic is not an easy task to tackle. Even if you're not a busy person, this is taking away your mode of transportation for a while, and that's not an easy thing to handle for many people. But can you keep driving when you know your car has to go to the workshop? Here's what to keep in mind when trying to drive with a broken transmission.

Short answer: no!

The only thing you should do if you think you have a bad transmission is go for a quick spin at your local mechanic. If you have a faulty transmission, it's only a matter of time before your vehicle can literally drive nowhere. Even if it's something as simple as running out of transmission fluid, your car can be damaged beyond repair. Running out of transmission fluid is like running out of engine oil. You will damage your vehicle and have a very expensive bill when you replace it.

How to know if there is a problem in the transmission?

The best way to avoid serious damage to your car is to identify it early, that's why we show you some tips that you can carry out to check if your gearbox, whether manual or automatic, has a problem.

1. Any unusual hissing or clicking noises.

If you hear something unusual in your car, that's a definite sign that something is wrong. For example, in an automatic transmission, it is very likely that there is damage if a hissing sound is heard, while in a manual, the noises that indicate damage are of a mechanical nature, for this reason, a click can indicate a problem that needs a mechanic's review..

2. Changes are not responding

Every time a change is made, the transmission must make it enter correctly, therefore, a failure to enter is synonymous with a problem. In the case of manuals, if the car accelerates but does not go as fast as the engine, it may be due to a damaged clutch. On the other hand, an automatic transmission that is hesitant to shift from Park to Drive or vice versa may be having a fault.

3. Spilled liquid

This is one of the easiest ways to identify if the gearbox has damage, because if there is a spill of transmission fluid, the automatic gearbox will not work properly. If you notice a light red, sweet-smelling oil mark where the car was, the automatic transmission fluid was leaking. On the other hand, if this liquid is dark and smells of burning, it is in poor condition.

4. Changes are skipped

The changes must be kept in the position that the driver places it, if it "jumps" while the car is in motion, it is due to a problem with the transmission, which in the case of being manual, would return to neutral position. It is important that if this happens, you should visit a mechanic as soon as possible to check the car.

5. The changes do not enter

This happens in manual transmissions in a very common way because when putting the change -and having the clutch pressed- it does not enter, most of the time this is because the transmission fluid does not have the correct viscosity or is too low or the shift cables need adjustment.

If your gear lever makes this noise, danger

The gearbox is one of the most complex elements of a vehicle. It is a set of gear wheels or pinions (a gear) that allows the operation of the motor to be converted into movement of the wheels. It requires various calculations for its design and also super-resistant and well-lubricated parts.

In general, a gearbox does not usually present problems, although many users do not use it properly and it is mistreated more than necessary. But, due to its complexity when designing and manufacturing it, plus the hours required for its disassembly and repair, a breakdown can be very expensive.

Detecting it can be key to the useful life of the car or the well-being of our checking account, so it is important to follow a series of guidelines that allow us to recognize what is failing in the vehicle's transmission.

It is possible that the fault does not come from the gearbox itself, but from one of the components that make up the transmission system such as the clutch, the bearings, the joints, etc. If any of the aforementioned parts fails or is in poor condition, it is likely that we will have problems.

If you notice any of this, go to your workshop and try not to move the car

All vehicles are equipped with a transmission system, what differentiates one from the other is the gearbox installed: manual or automatic. In any of the cases, if you find these symptoms, it is advisable that you go to the workshop as soon as possible to check your car and solve the possible fault.

Smell of burning oil : If you notice a smell of burning oil, it is likely that the transmission is overheating. When this occurs it could be because the fluid levels are low or because it is not the correct oil for that transmission.

Noise in neutral : This behavior can be due to a low level of the transmission fluid or because it needs to be changed. It can also be due to a mechanical problem, in which case you should go to the workshop for repair.

The changes do not enter : This usually occurs in transmissions with manual changes when we activate the clutch pedal. The cause may be due to a mismatch in the gear cables or the clutch connection or because the transmission fluid is lacking or does not have the correct viscosity.

The clutch is engaged : When you press the clutch pedal to activate the change and you notice that it is engaged, it may be that there is a fault in the connection cables or in the discs.

Brusquedades in the automatic : This usually occurs in parking maneuvers and is due to a failure of the electronic unit of the management of the box.

The automatic gearbox slips in all gears or has trouble accelerating : It may be due to the oil level being below the minimum and it should be replaced to see if this problem is solved.

The changes 'jump out' : If it happens to us that when inserting a gear it 'jumps' and comes out returning to neutral, it is a more than obvious sign that there is a problem in the gearbox. It could be the guide elements, the forks, loose bolts or even a low oil level.

Fluid spill : If you notice fluid leaks on the ground, these may be from the transmission oil. It may not be a problematic breakdown and you just have to change the gaskets because they are old, but don't let it go just in case (it could be engine oil and not gearbox...).

The car shakes or squeaks : If your car squeaks when making a change or shakes every time you change gear, these are obvious indications that something is wrong. The reasons can be many, from lack of lubrication to assembly misalignment or broken parts.

Despite all these symptoms, the transmission system is usually a strong and robust system that does not usually break down, as long as proper maintenance is carried out so that the operating conditions are optimal. Transmission problems can come from the driveshafts before the gearbox, or from the ball joints and joints. However, the passage of time and the number of kilometers cause a particularly noticeable wear on moving parts.