Clutch chatter what is

Sponsored by ACDelco. GM transmissions and transfer cases are unique to each individual vehicle. This video is sponsored by ACDelco. Click here to view past issues. One of the most difficult clutch-related problems is chatter. Chatter is sometimes difficult to diagnose because it has many root causes, and some of them may not seem related at first.

Chatter is most evident when engaging the clutch or launching the vehicle. The driver will sense this at any contact point they have with the vehicle, such as the seat, steering wheel or floor of the vehicle. Contamination by any lubricant will cause an uneven coefficient of friction on the disc friction material that can cause grabbing and lead to a chatter condition. While the clutch gets blamed for chatter most of the time, the suspension and driveline are often the root cause of chatter.

You can check for clutch chatter by starting the engine, depressing the clutch completely, and shifting the transmission into first gear. Rev the engine and then slowly release the clutch pedal to check for chatter as soon as the pedal begins to engage.

Do not release the pedal completely, and, depress the clutch pedal immediately and reduce engine speed or you could damage the clutch parts. Clutch drag is when the clutch disc is not completely released when the clutch pedal is fully depressed. To check for clutch drag; with the engine running depress the clutch pedal completely, and shift the transmission into first gear.

Without releasing the clutch shift the transmission into neutral, wait 5 seconds and attempt to shift smoothly into reverse. If shifting into reverse after waitng 5 seconds causes grinding of gears clutch drag is a possible culprit. This is not an exhaustive list of clutch problems but only the most common ones. All sorts of noises and vibrations can be caused by clutch problems.

Also, some cars such as the Kia Forte are prone to have clutch problems. If you suspect that you have clutch problems bring your car to Hi-Tech Car Care and we will give it a check up. No matter what problem you are having with your car, you can be sure that we will fix it right at Hi-Tech Car Care. If the noise dies away slowly, it's the first motion shaft input bearing in the front of the transmission.

RX7's do it pretty much all the time and I've heard it in other gearboxes which other than the whir continued to work just fine for a long time.

If the noise continues or gets worse when you push the pedal down, then that indicates a release bearing problem. Those will quite often fail catastrophically! Your is likley the round spring in the "Shock Hub" are not up to snuff. The shudder could accelerate the demise of other driveline parts The flywheel should almost always be machined, or replaced Subaru's are special for a number of reasons.

On certain models, they have a restrictor in the clutch line for how fast the clutch can be released. On ALL Subaru's, the input shaft which the throwout bearing rides on actually wears out. This causes the throwout bearing to catch and be a general pain in the ass. Almost every Subaru I've been in and older has this issue.

A company makes a "snout repair kit" that involves a sleeve that goes over the shaft and a new throwout bearing. Beyond all of that, I typically find chattering to happen due to a toast throwout bearing, especially if the clutch has been replaced with a cheap chinese one. You'll need to log in to post. Log in. Login Digital Edition Buy a Subscription. Forums » Grassroots Motorsports » What exactly is clutch chatter? What say ye?

Time for another clutch?