Need a TH 400 guru...

[Dusk Blue Z]

I talked to a good friend that has worked on GM automatics for years about your problem. He asked a couple of questions about your car.
1. What rear gear are you running?
2. Does it short shift during normal acceleration?

I'll forward your answers to him as his computer just smoked it's hard drive last night. He did think if your running a 4:88 or so the transmission might be running just like it was designed to. He thought you may have to play with the govenor springs to make it shift differently, also didn't know if there were springs you could by from the aftermarket that would work or just trial and error to get your kick down points right. He said a governor from an old school bus with a TH 400 might work as they ran a pretty steep gear.

Mike