My transmission slips out of fear at high speed but not all the time.

Could it be the clutch

My car has 200000 miles.
My car has a manual transmission.

Experienced mechanics share their insights in answering this question :
This is a symptom of worn or damaged gears within the transmission. It can also be a mis-adjusted shifter linkage, not allowing the gear to fully engage. If your clutch is going bad, you will notice the engine accelerate faster than normal while still moving the truck forward. I feel like you are spinning your tires. You may refer to the factory service manual for adjustment specifications, or have a certified technician, like one from YourMechanic, inspect your slipping issue and verify the correct shifter adjustment.

How to Identify and Fix Common car Problems ?

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Common reasons for this to happen:

Low Transmission Fluid: If you`re of driving age, you`ve heard this one time and again, but it bears repeating. The number one cause of all transmission problems, from slipping to abnormal sounds, is low transmission fluid.

In an automatic transmission, slipping can be caused by wear and tear on numerous different parts. These include damaged or worn clutch plates, transmission bands, and solenoid packs. If your automatic transmission has been slipping, it`s likely a technician will replace some or all of these parts to fix the problem.
A manual transmission and an automatic transmission have the same reasons as to why it is experiencing slipping and high engine revs. A few of those reasons include the clutch being worn out or wearing out, or a clogged transmission filter. The transmission fluid can be to blame, too.
The Transmission Range Sensor tells the PCM the position of the transmission shifter. The PCM uses this information to control which gears of the transmission to enable or disable. When the TR sensor fails it can cause wrong gear starts, no upshifts, or what feels like a falling-out-of-gear condition.
What is the fix for a slipping transmission? It`s simple. Just pop the hood of your vehicle, locate the transmission switch, and change the setting from “SLIP” to “STABLE” . . . If only it were that easy.
This means that it is not shifting smoothly from gear to gear or that it is not staying fully in gear as you drive. This can be the sign of internal damage or it may just mean you are due for a standard transmission service to replace the transmission fluid, filter and pan gasket.
Even a brand new clutch can be slipping for a variety of reasons. Besides the clutch pressure plate and the clutch disk, clutch slipping causes can often be found in the release system. Additional causes include an incorrectly reworked flywheel or installation of the wrong clutch.
If you are experiencing slipping, the first thing you should do is check your transmission fluid levels. If they are low, you should top it up and check for leaks. Slipping can also be caused by burned or worn out fluid.
The most common cause of clutch slipping is wear and tear on the clutch plate. Over time, the clutch plate begins to slip, resulting in a loss of power. This can be caused by a number of factors, such as driving in stop-and-go traffic, or driving with a heavy foot.
Common signs include harsh or improper shifting, cruise control not working, and the Check Engine Light coming on.
Description. Lucas Transmission Fix is a non-solvent formula that stops slip, hesitation and rough shifting in worn transmissions and completely eliminates most seal leaks. Use in any transmission for preventative maintenance.
Issues That Can Happen From Having a Bad Transmission

In some of the most extreme cases, you will not be able to give the car any gas, which means you may slow down and this can cause problems when trying to continue going, especially on a highway or major road.

Typically with transmission slipping, it may feel as if your gears are changing for no logical reason. Your engine may start to create a whining sound or pitch when it occurs. Alternatively, it may feel like you haven`t got enough power to drive at the desired speed.
When the torque converter starts malfunctioning, you may feel shuddering and even slipping in overdrive. You usually notice your car shuddering because it feels like it`s vibrating. Your car will vibrate even when you`re not going very fast. The shuddering makes the car lag and is very noticeable.
The best thing to do to confirm the problem is to test the torque converter. To test the torque converter, you must step on the pedal to the floor and accelerate your engine for up to five seconds. The reading for the revolutions per minute (RPM) will max out at the stall speed.
SLIPPING CLUTCH

That`s when the clutch disc can`t sustain the engine torque in low gear, but in high gear or on light acceleration, it`s fine. You can make it hours, days, or even weeks sometimes when your clutch just starts slipping.

Clutch slip is a common issue where the disc which joins to your flywheel is not catching as well as it should, sometimes failing completely. This means that your vehicle won`t get full power to your wheels in the way it should when connected to the right gears.
This hesitation while accelerating can be the result of a number of issues, including something like a clogged fuel filter or even a broken fuel pump. Sometimes, something could also be wrong with the transmission.
A common cause is a problem with the spark plugs or ignition system. Other potential causes include a blockage in the fuel line, a faulty oxygen sensor, or a problem with the mass air flow sensor. Vacuum leakages can also cause a delay in acceleration. A clogged air filter or low engine oil level can also be a cause.
A bite point that is high up the clutches working travel (close to where the clutch stops before removing your foot) may be an indication that the clutch is worn and close to need replacing. This is only an indication however as it may simply need adjusting as every cars bite point is in a different location.
“Riding” the clutch is the most common reason for premature clutch failure. Even the slightest pressure on the pedal will partially disengage the clutch, causing the release bearing, pressure plate and flywheel to overheat.
The catalytic converter has very very little to do with the transmission. The catalytic converter will keep the engine from being able to “exhale” and can cause engine problems and damage if faulty, but it wont cause direct transmission issues.
a problem with one or more of the solenoids can cause a lack of pressure, resulting in hard, soft or delayed shifts. a failed shift solenoid can also cause transmission slippage, where your engine revs faster but the car stays at the same speed.
This could be caused by a clogged fuel filter or a faulty oxygen sensor. Both of these issues can cause your car to run less efficiently, which can lead to shaking while accelerating. If you suspect that your fuel injector system is the problem, it is best to bring it to a mechanic for diagnosis and repair.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

my transmission is "slipping" 3% of the time
ANSWER : Hello. From what you describe, it would appear that your transmission is beginning to slip. This can be caused by many things. The first thing I would do is check the vehicle’s transmission. Automatic transmission use fluid pressure to operate, and will have all sorts of issues if the fluid is low or dirty. If the fluid checks out, I would then move on to looking at the transmission itself. It may be possible that one of the components, such as a sensor or solenoid may be going out and causing your issue. It may also be possible that the transmission is simply worn out and can no longer hold the engine torque, perhaps due to a worn clutch pack, valve body, or torque converter. In these cases of removal and overhaul of the transmission is required. You may be able to continue driving the vehicle, however, because it may cause the symptoms to worsen over time if the issue is not quickly addressed.

Kia Optima 2004 v6 LX new engine old transmission no problems before with transmission now my transmission is shifting a high rpm
ANSWER : Hi There,
This may be an issue related to the communication of the PCM and the TCM (Transmission control module). As you may know, the TCM relies on the PCM to transmit information related to RPM’s, which the TCM then uses to determine when to direct the transmission to shift. The transmission control module has various sensors such as vehicle speed sensors, wheel speed sensors, throttle position sensors, turbine speed sensor, and transmission fluid temperature sensors that all direct information to it in order for it to perform it’s function. Other functions controlled by the TCM are components such as a kick down switch, traction control system, and cruise control module. Any of these may also affect the way the transmission control module performs and controls the transmission and the shifting of your vehicle. I would suggest having a professional from Your Mechanic come to your location to properly diagnose your transmission problem.

Car hesitates and slows down badly at times. It almost stalls at times. It keeps slow speed at 20-30KM.
ANSWER : Hello. I would need to know the year of the vehicle to know where the fuel filter is located. If this is an older model, it is located under the vehicle. Most of the newer models only have a filter on the fuel pump.

From what you are explaining, it sounds like the fuel pump is failing. When the fuel is low, the pump will get hot and a weak pump will lose pressure causing this to occur. I would usually check the fuel pressure to see if it is low, especially when the fuel level is low. If it is, then the pump needs to be replaced. If you plan on having this done, consider YourMechanic, as a certified technician can come to your home or office to diagnose the hesitation problem and guide you with repairs.

My transmission slips out of fear at high speed but not all the time.
ANSWER : This is a symptom of worn or damaged gears within the transmission. It can also be a mis-adjusted shifter linkage, not allowing the gear to fully engage. If your clutch is going bad, you will notice the engine accelerate faster than normal while still moving the truck forward. I feel like you are spinning your tires. You may refer to the factory service manual for adjustment specifications, or have a certified technician, like one from YourMechanic, inspect your slipping issue and verify the correct shifter adjustment.

Transmission shift hard after high speed driving but shifts normal after engine is off for a while.
ANSWER : Hi there. Transmission fluid should be flushed every 50,000 miles to help avoid issues like you are experiencing. So, it’s probably a good idea to have your transmission fluid flushed and filter replaced, as the obstruction of debris or worn out fluid can cause the hard to shift issue you’re experiencing.

Question can excessive speeding break a transmission in an automatic vehicle? reaching a high speed not boosting
ANSWER : Hi there. Speeding in general can be very dangerous for any vehicle component. However, how the vehicle gets to that speed (as in acceleration or exhibition of speed; ie; illegal street racing) could definitely break a transmission, drive axles, gears, and other power train components.

Also, when a vehicle is being driven at a higher rate of speed than the vehicle is designed for, it can create excessive heat in the transmission which can cause the fluid to expand and break transmission fluid lines inside the housing.

If your transmission is slipping during acceleration, contact one of our local mechanics to inspect the issue firsthand and make the necessary repairs.

My van transmission started slipping and the van is making a whining sound now. I had transmission fluid filled but it is even wor
ANSWER : It would be a good idea to check to be sure that the fluid level was not overfilled. Too much fluid creates shifting and operational problems just as too little fluid will. So, the level should be carefully verified. If the whirring noise is from the transmission (it could be wheel bearings for example), such noise could be from the torque converter, oil pump, or other rotating elements. The noise would have to be heard first hand by a mechanic to pin it down. If the transmission is not shifting properly, it could be as simple as a valve body issue (typically the valve body is replaceable on the vehicle) but there are also many other causes of shift difficulty such as broken or worn bands, failing clutch pistons and so forth. Some of these faults can be determined by using external gauges to measure internal hydraulic pressures within the transmission when you shift. Transmissions can be repaired; you won’t necessarily need a "new" transmission but yes, admittedly, such repairs can be costly. If you want to get a definitive diagnosis and get information about repair options, just request a transmission shift and noise diagnostic and the responding certified mechanic will help you with that. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Ac compressor clutch isn’t engaging on high fan speed setting while it engages on the prior three fan speeds which are all slow.
ANSWER : The blower not working is most likely due to a fault with the blower resistor. When you go to high blower speeds the A/C may disengage the compressor if the cycling switch cycles or the high pressure switch gets over pressurized, shutting the compressor off. The first thing to do is to get the blower working correctly then test the A/C pressures using A/C gauges. If you’d like to get this fixed, consider YourMechanic, as a certified technician can diagnose your A/C issue and fix it accordingly. Good luck.