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Old 10-29-2020, 06:17 PM   #4
911monty
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Join Date: Oct 2014
Location: California Central Coast
Posts: 1,476
Garage
Quote:
Originally Posted by Smallblock454 View Post
You mean the pilot bearing of the transmission input shaft? That wasn't replaced.

But they replaced the clutch relaese bearing two times.

The vibrations in the footwell showed up first, after the workshop did the initial repair on the clutch and so on.
Hopefully not but I suspect the pilot bearing. Attached is a procedure to check wether the problem is the release or pilot bearing.
Start with a road test of the vehicle. Listen for noise with the transmission in gear and the clutch pedal to the floor. Next release the clutch with the transmission in first gear. Noise under this condition indicates a worn release bearing or a worn pilot bearing.

To isolate the two, keep the clutch pedal on the floor and shift the transmission into neutral. If the noise persists, the release bearing is bad. If the noise is gone, the pilot bearing is bad.

A bearing noise that occurs when releasing the clutch pedal to engage the clutch while in neutral, but goes away when the pedal is depressed is caused by a bad transmission input shaft bearing.

Hope this helps
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