1988 Muncie GM 282 5 speed manual transmission clutch fork to release bearing fit (Page 1/1)
David Hambleton AUG 08, 11:59 AM

What should the fit be between the clutch fork arms for the release bearing: interference fit, slip fit or clearance fit (how much?)?

sanderson231 AUG 08, 06:01 PM
The throw-out bearing should not bind in the fork. I would call it a slip fit.

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formerly known as sanderson
1984 Quad 4
1886 SE 2.8L
1988 4.9L Cadillac
1988 3800 Supercharged

reinhart AUG 10, 12:54 PM
Is it just the lighting or is that release fork bent near the top of the shaft?
David Hambleton AUG 10, 05:23 PM
The light is reflecting on a machined clearance surface to the left of the lower arm.
The first pic in this thread: https://www.fiero.nl/forum/Forum2/HTML/146242.html shows the as-found condition; the upper fork bent severely.
I bent it back to show the in-service orientation of the release bearing and fork.

[This message has been edited by David Hambleton (edited 08-10-2022).]

David Hambleton AUG 10, 05:26 PM

quote
Originally posted by sanderson231:

The throw-out bearing should not bind in the fork. I would call it a slip fit.




Thanks, that's what I thought it should be. I got a second clutch fork and it provides a nice slip fit.

David Hambleton AUG 10, 09:33 PM

quote
Originally posted by reinhart:

Is it just the lighting or is that release fork bent near the top of the shaft?



The fork shaft itself is straight and fit closely but freely in both upper and lower bushings. After 44,000 km (27,000 miles) of easy use, wear is negligible.