12200411 set up for 700R4

[Fast355]

Thanks Robert!

Back to 700R4 and lock up only in fourth gear...doesn't it need some kind of VSS from PCM to lock? This vehicle trans was controlled by ECM that has speed, no vacuum switch which IIRC only came in pre 87 Chevy Truck 700R4.

Vacuum switch was weird on those old 700r4s. It was only used for 2nd and 3rd gear lockup as a pressure switch controlled 4th gear lockup.