Intermediate/2nd Clutch.
Used 1 .100" TH400 Steel, & 3 .076" 4L80E Steels to get the correct clearance of .042". GM runs this clutch way loose for some reason, Too much clearance allows the Piston to pick-up too much speed & SLAM the Clutch Pack, Which doesn't do the Case Lugs, Intermediate Snap ring, Or the Intermediate Sprag any favors!
A CK Performance Spiro Lock Intermediate Snap Ring was utilized in this build, These have been used in 1500hp TH400's without failure! The stock Snap Ring can blow out &/or blow the Case Lugs out.
I cannot believe people take chances over a $13 part!!!
http://www.ckperformance.com/View/TH...UTCH-SNAP-RING
.100" TH400 Steel first, Gives more apply support vs a .076" Steel...
Intermediate Friction, 4 total on a 4L80E vs 3 on a TH400...
Stock Intermediate Snap Ring vs a CK Spiro Lock....Way more support!...
Snap Ring & Backing Plate installed...
