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Re: clutch/transmission tutorial Posted by Justin VanAbrahams [Email] (#32) [Profile/Gallery] (more from Justin VanAbrahams) on Wed, 8 Aug 2007 09:39:44 In Reply to: Re: clutch/transmission tutorial, oldsaab, Tue, 7 Aug 2007 18:03:01 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I think you have it backwards:
> North of the chains is the engine, flywheel, pilot bearing, the release
> bearing and pressure plate, all moving as one when your foot is pushing
> on the clutch pedal
The pilot bearing's job is to spin at the same rate as the clutch input shaft. It's what supports the "tip" of the clutch input shaft, while the upper primary chain sprocket supports its "base." It's a bearing because it makes up the difference in speed between the engine and the transmission. If the transmission is moving, the pilot bearing is moving. If the transmission is stopped, the pilot bearing is stopped.
So, with the car physically stopped and the engine idling, the pilot bearing is "moving." With the car moving at engine speed, the pilot bearing is "stopped." That former scenario - engine moving and car stopped - is what creates the screech. Generally, the bigger the differential between engine speed and transmission speed, the more heinous that screech, which is why its worst at take-off.
posted by 207.15.18...
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