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Showing posts with label Transmission Diagnostic. Show all posts
Showing posts with label Transmission Diagnostic. Show all posts
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Clutch Pedal Vibration - What's the Risk?

The clutch pedal vibration is a problem that should concern you when it happens while depressing the clutch pedal. It's not a simple problem as you think it is, it's a risk to continue driving your car with a vibrating clutch pedal. 



It will not only creates a problem on the car but also damage important components of the transmission, it starts as a small problem and become bigger as you continue driving the car with a clutch pedal vibration, this will result in a more expensive repair. Continue driving the car will also increase the risk of stalling. There are three possible reasons why would a vibration in the clutch pedal occurs.

Possible Reasons for a Clutch Pedal Vibration

(1) Loose clutch disc
(2) Loose pressure plate
(3) Loose flywheel

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To determine the reasons that cause the problem, the transmission assembly must be opened up. It is very difficult to determine the real cause of the problem without looking inside the transmission. usually,  cause if there is a clutch pedal vibration when the clutch pedal is depressed a loose clutch disc, pressure plate, or flywheel is the problem. These three components are somewhat connected to each other.

The clutch disc is fitted in between the pressure plate and the flywheel, the purpose of the clutch is to transmit or cuts off the power produced from the engine to the transmission.

The flywheel is a round plate that is coupled to the engine crankshaft, the crankshaft is the one that makes the flywheel runs. When the car is in gear the pressure plate presses the clutch disc against the flywheel this allows the engine power to be transmitted to the transmission. Back to the problem, if the clutch pedal is depressed the clutch pedal is released in this case if there is looseness on any of the above-mentioned parts the parts will wobble and that wobbling will be transmitted on the clutch pedal thus creates clutch pedal vibration.

How to correct clutch pedal vibration when the pedal is depressed

No other choice but to bring the car to a shop specializing transmission repair, probably the transmission will be opened up to determine the exact cause of the problem. This kind of work is expensive so make sure that the shop where you bring the car is a reputable one to avoid a low quality of work.


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Why is My Manual Transmission Grinding?

Why is my manual transmission grinding when shifting? Transmission is very complex parts that are why when there is trouble it is very hard to diagnose without looking at the actual transmission, the diagnosis mention on this article is just a possibility unless the actual transmission is inspected.



If there is grinding on the transmission when shifting to one particular forward gear the possible reason is that there is a problem with the synchronizer of that particular gear. What is inside the transmission is a device called the synchronizer, the purpose of the synchronizer is to bring the rotating shafts/gears together at the same speed for smooth shifting. If the synchronizer is faulty a grinding sound occurs and shifting will become impossible for that particular gear.

But if the grinding occurs only at first gear just after shifting from a stop and not during downshifting the possible reason is that there is too much clutch pedal “free play”. Free play is the distance of the clutch pedal movement before the clutch begins to disengage. If there is too much pedal free play even when the clutch pedal is press all the way down, the clutch is still not fully disengaged and will results in grinding sound when shifting into first gear.

Seek the help of the mechanic specialized in transmission repair to inspect the transmission, if the mechanic recommends tearing down the transmission do not agree without seeking a second opinion. The problem may be solved by simply adjusting the clutch pedal free play, mention this to the mechanic.

Transmission Grinding When Shifting

There is a transmission grinding sound when shifting in all gears. The reason is because the clutch is not releasing fully.


A/T Upshifts Trough Gear Too Early

From stop the upshifts trough gear occurred too early this is because of the transmission have wrong fluid level, a faulty electronic sensor, throttle valve  linkage or governor problem.


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Gear Shift Not Working for Automatic Transmission

Gear shift for automatic transmission is not working when the shift lever is moved the reason for this is a bad fluid pump or a gear selector problem.

 

Noise When Shifting into Two or More Gears

While driving and about to shift into two or more gears you will hear a noise coming from the transmission this problem happens because the input shaft bearing or the main shaft bearing of the transmission is damage.


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Transmission Popping out of 3rd Gear and High Gear

When shifting into the 3rd gear or in a high gear in particular, the transmission pops out. However the transmission shifts normal in other gears. The reason why transmission jumps out of gear is because the shift linkage is faulty or the movement of the shaft is excessive.

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Transmission Popping out of 2nd Gear

When shifting into the 2nd gear, the transmission pops out. However the transmission shifts normal in other gears, the reason why transmission jumps out of 2nd gear is that the shift linkage is out of adjustments or the shifter fork is loose.

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Noise when Moving in One Particular Gear

Noise is heard when shifting into one particular gear, the noise does not occur on other gears when shifting. This happens when the teeth of the involve gear is damage or the bearings of the involve gear is damage.


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Transmission Jump Out of Gear When Reversing

Transmission jump out of gear when the car is reversing. The gear wont stay when backing up this is because the shift linkage is faulty or the shift linkage is weak, other reason is because the shift rail spring tension is weak.

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Howling Noise When Clutch Pedal is Release

When the clutch pedal is released there is a howling noise than can be heard coming from the transmission. The reason why howling noise occurs when the clutch pedal is release is the faulty throwout bearing or faulty pilot bearing.


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Grinding Noise when Shifting

When shifting into one particular forward gear grinding noise occurs. However, the grinding sound is not heard when shifting into reverse gear.

Possible cause of grinding noise when shifting

The transmission gear synchronizer is defective
If the grinding noise happens only when shifting into a forward gear then it is most likely a problem on the component of the affected gear which is the synchronizer. The synchronizer is a transmission component that brings the rotating shaft or gears together at the same speed when the car is running, the purpose of this is to smoother the shifting.

Now, if the synchronizer is defective there is a grinding sound which can be heard every time the transmission is shifted into the forward gear. When the defect of the synchronizer is severe the transmission is hard to shift or even worst then shifting to another gear will become impossible.

There is too much free play on the clutch pedal
If for instance, the shifting problem occurs during shifting from a stop going into the first gear, it is most likely that the cause is related to the clutch pedal free play. Clutch pedal free play is the movement of the clutch pedal just before the clutch starts to disengage. When there is too much clutch pedal free play it can cause for the clutch not to be fully disengaged when shifting into first gear coming from a stop even when the pedal is fully depressed, if this happened there will be a grinding sound heard coming from the transmission every time the gear is shifted.


Problem with the transmission is not an easy job it should be handled by a mechanic that is specialized in transmission repair, therefore the only option you have is to bring the car to a reputable car shop that is expert when it comes to transmission repair.

Since the problem happened only when the shifting is done from stop going into the first gear the mechanic may only need to adjust the clutch pedal free play, or sometimes the mechanic will recommend opening the transmission, in this case, do not always agree with the mechanic recommendation seek first for a second opinion coming from another shop, if the other shop also recommend that the transmission is necessary to tear down then that is the time to agree for the transmission overhauling.
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Grinding Sound When Shifting into Reverse Gear

When shifting into reverse gear a grinding sound is heard, the reason for this is that the clutch is not disengaging.


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