Adjustable Clutch Fork Ball Stud
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 1,193
Likes: 176
From: Hillsborough NC
Adjustable Clutch Fork Ball Stud
I'm in the process of rebuilding my powertrain and have changed the flywheel to a lightweight aluminum one. The new flywheel is thinner than the stock flywheel, which necessitates changing the clutch fork pivot ball stud height.
I'm using the same clutch that was in the car (new, but ACDelco replacement) so the clutch/pressure plate height from the flywheel should be the same as before. Is figuring out the new height as simple as making it equal to the change in thickness of the flywheel? If so, I'm assuming it should be adjusted longer by that amount, is that a correct assumption as well?
Just don't want to have to remove the tranny after we put it all back in the car (going in as one assemble drivetrain).
Thanks
I'm using the same clutch that was in the car (new, but ACDelco replacement) so the clutch/pressure plate height from the flywheel should be the same as before. Is figuring out the new height as simple as making it equal to the change in thickness of the flywheel? If so, I'm assuming it should be adjusted longer by that amount, is that a correct assumption as well?
Just don't want to have to remove the tranny after we put it all back in the car (going in as one assemble drivetrain).
Thanks
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
GM p/n 3790556 long 1.680
At your local Chevy-GM dealer. About $13 with tax at my Pontiac dealer.
I have a thinner lightweight flywheel and the block saver plate. so I tried those adjustable wonders from Summit for $48 and figured out that GM made two Pivot ***** - the longer for a thinner flywheel
At your local Chevy-GM dealer. About $13 with tax at my Pontiac dealer.
I have a thinner lightweight flywheel and the block saver plate. so I tried those adjustable wonders from Summit for $48 and figured out that GM made two Pivot ***** - the longer for a thinner flywheel
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 1,193
Likes: 176
From: Hillsborough NC
GM p/n 3790556 long 1.680
At your local Chevy-GM dealer. About $13 with tax at my Pontiac dealer.
I have a thinner lightweight flywheel and the block saver plate. so I tried those adjustable wonders from Summit for $48 and figured out that GM made two Pivot ***** - the longer for a thinner flywheel
At your local Chevy-GM dealer. About $13 with tax at my Pontiac dealer.
I have a thinner lightweight flywheel and the block saver plate. so I tried those adjustable wonders from Summit for $48 and figured out that GM made two Pivot ***** - the longer for a thinner flywheel
Last edited by SLVRSHRK; Jan 9, 2008 at 09:08 AM.
Drifting
Joined: Apr 2002
Posts: 1,720
Likes: 19
From: Manhattan Beach Ca
Be careful. I just did this with a thinner flywheel also. The flywheel was .200 inches thinner so I thought I would adjust my adjustable stud by .200 longer than the short one that was in there. After installing, it looked like I didnt have enough play at the fork and I thought I was too long. Well after 3 tranny pulls it ended up adjusting to the longest position I could tolerate and still have some thread left at the threaded adjusting rod connection at the firewall. Point is, if you go with GM long there is no adjustment but you might get lucky if it worked out OK. If not, you'll be pulling the tranny.
I would measure the difference between flywheel thickness and extend your adjustable pivot stud a hair more than that difference. Assuming your new flywheel is thinner and you have room on the threaded rod.
I would measure the difference between flywheel thickness and extend your adjustable pivot stud a hair more than that difference. Assuming your new flywheel is thinner and you have room on the threaded rod.
Instructor
Joined: Jan 2006
Posts: 201
Likes: 0
From: michigantown IN.
Lakewood pivot ball
I've used the adjustable Lakewood pivot ball from Summit (LAK-15501) $16.95 on 2 of my C3 swaps and found it to be the hot ticket for clutch pivot issues. I adjusted it to a little over half of its possible adjustment which is significantly longer when compared next to the stock short ball. I can now back off the fire wall pushrod , and have much more adjustability under the hood. My Stingray has had this piece for 9 years of driving, it's a great product.
Last edited by vintage-racer; Jan 11, 2008 at 09:55 PM. Reason: misspelling
