Got some answeres on clutch clearances.
Thread Starter
Senior Member
Joined: Mar 2003
Posts: 523
Likes: 0
From: Marion, Iowa
Car: 92 Camaro
Engine: ZZ4 Crate Engine w/Hot Cam
Transmission: Rebuilt 700R4 with Transgo and MW 3
Axle/Gears: 3.73 Eaton Posi
Got some answeres on clutch clearances.
I was at a reputable transmission shop today shopping for some different thickness backing plates for the rear input housing.
The guy there helping me told me that I didnt really need a backing plate- he's never had to replace one in all his years there. He also told me a good rule of thumb for clutch clearance is 0.008" - 0.010" for EACH clutch, regardless of number of steels. So for 4 clutches you would want to see 0.032-0.040.
He said most guys use 0.010 per clutch - it's better to be looser than tighter. He said to throw the ATSG book out the window and go by that rule instead.
Keep in mind this wasn't a performance shop - you might want tighter clearances if you've got a high HP motor.
He also told me that it's a good idea to lightly sand the backing plates with 100 grit paper to get rid of the "mirror image" on them. Otherwise the clutches can slip.
The guy there helping me told me that I didnt really need a backing plate- he's never had to replace one in all his years there. He also told me a good rule of thumb for clutch clearance is 0.008" - 0.010" for EACH clutch, regardless of number of steels. So for 4 clutches you would want to see 0.032-0.040.
He said most guys use 0.010 per clutch - it's better to be looser than tighter. He said to throw the ATSG book out the window and go by that rule instead.
Keep in mind this wasn't a performance shop - you might want tighter clearances if you've got a high HP motor.
He also told me that it's a good idea to lightly sand the backing plates with 100 grit paper to get rid of the "mirror image" on them. Otherwise the clutches can slip.
Thread
Thread Starter
Forum
Replies
Last Post
HoosierinWA
Tech / General Engine
5
Oct 7, 2015 10:15 AM