[ED501]

It has a internal solenoid and decided to shim spring some and check this time , because i heard with Bigblocks and 700 hp would need atleast 200psi and was thinking Pa older brake was kinda low on PSI compared to others. I hope 40 thousands wasnt too much of a shim. It seem really to make a differance putting back in.

 

[ED501]

Forgot to mention this is a C4 tranny.

 

[Hutch]

200-210 sounds right. Any less and the brake won't hold properly.


Hutch

 

[ED501]

Ok , thanks, I know what to shoot for, so i guess i leave in the shim and check it. First time ever shimming and just dont want to blow any seal.

 

[Hutch]

I recall years ago having to get another PR spring, shimming didn't work.


Hutch

 

[Ridings Automatics]

The original PR spring is a spring out of a front clutch from a TF727. I offen thought that a direct clutch spring from a TH400 transgo -2 kit would work perfectly. C-4's love 210-220 psi. Typical P/A brake new is 180-190 psi.