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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: cwest on July 26, 2014, 11:15:01 am

Title: Can you adjust the clutch slave cylinder to fully relieve pressure?
Post by: cwest on July 26, 2014, 11:15:01 am
Is there a way to adjust a clutch slave cylinder to fully relieve pressure on the fork?  I just did a auto to manual swap on my 86' K20 and have taken it on a couple test runs.  I started getting a whistling noise when cruising in 3rd gear.  After getting the truck home I got underneath and the bell housing what ridiculously hot.  I think the slave cylinder rod isn't releasing all the way and continuously pressing on the fork maybe causing the TOB to whine and maybe even disengaging the clutch a little and causing it to slip slightly and heat up.  I really hope I didn't hose my TOB and clutch on the first couple outings!!

Also, The transmission itself was leaking gear oil like a sieve.  Like an idiot I assumed the people that rebuilt the transmission would torque the bolts down.  To my naive surprise I was able to torque almost every bolt a half turn with a normal wrench.  Towards the end of my drive too I was getting a lot of grinding trying to downshift into 2nd, could that be a low gear oil issue?
Title: Re: Whistling noise coming from tranny in 3rd gear
Post by: bd on July 26, 2014, 12:02:29 pm
Leaking like a sieve - excessive heat - grinding into 2nd - how low was the oil level?  It may have burned a bearing and/or damaged a synchro.

General rule of thumb: there should be 3/4" - 1" of free play at the clutch pedal if you have lever & rod linkage.  A little less with hydraulic actuation.
Title: Re: Can you adjust the clutch slave cylinder to fully relieve pressure?
Post by: cwest on July 26, 2014, 12:12:05 pm
Sorry, bd, I just revamped my post after doing some more research.  Is there a way to make the slave fully depress.  It seems to be continuously pressing against the fork.