Vent on the pump been plugged and relocated? Any Griner brake I ever had (3) didn’t require an accumulator piston.

....and some more tasty tidbits. http://www.tcsproducts.com/media/uploads/user-files/12-22g20_Griner_Trans_Brake1.pdf

Make sure your torque converter is built for trans brake use.
I prefer the steel front planetary, but the aluminum one will take some abuse for sure.



I’m no pro by a long shot.... but here was a fun beer night at the track in Al’s trailer using a swap meet core to get Don to 1st round of quick 16 in the am....