Can anyone share there method of adjusting clutch linkage to make sure clutch is engaging and disengaging properly on a 66-427 4spd? Clutch has recently been replaced with all new GM components (disk, pressure plate, throw out bearing, fork etc). The only change was a resurface of the flywheel which was a minimal cut and the first time ever done. Linkage was not moved from before rebuild but clutch does not feel like it is releasing completely with pedal to floor. It's close, but not as smooth as before. All suggestions are appreciated. Thank you.
-
-
Re: clutch linkage adjustment
New clutch facings can be "fuzzy" and engagement can be "slow", but usually smooth. With some breakin - a little wear and compression of the friction material, disengagement/engagement is usually less progressive over a shorter range of pedal travel. Really hard, compressed, and worn old friction material can be like an on/off switch and make smooth engagement from a dead stop tough.
Set the pedal free play at no more than one inch. From idle speed depress the clutch pedal and wait several seconds for the countershaft to wind down. Then engage reverse. There should be no grind. If so, repeat the test waiting longer before attempting to engage reverse. Any grinding is an indication of clutch drag.
If this is the case, reduce freeplay to about 1/2" and redo the test.
Freeplay is easily adjustable with the two nuts at the end of the clutch pedal pushrod. Reducing the amount of exposed thread at the end of the pushrod reduces pedal freeplay, and clutch wear reduces freeplay.
Also make sure the pedal has the correct stop bumper and return spring on the pushrod. I believe total pedal travel should be about 6.5", but check your CSM.
Duke -
Re: clutch linkage adjustment
Thanks much Duke, will give it a try.
RichComment
Comment