1964 Buick Riviera Transmission

[64SFrivi]

Hello folks,

I had a question I am trying to rebuild my 64 Buick Riviera's transmission. Looking for an master overhaul kit, but when I do most sites sell a TH-400 kit, even though 64 Rivi's came with a ST-400.

What is the difference between a TH-400 vs ST-400 or is there any? I just don't want to buy a kit and find out their are a slight difference. Most places had really bad return policies. If anyone can help would greatly appreciate it.

thanks!

[Commodore]

I am to understand that you have a Super Turbine 400 transmission in your Buick Riviera? If you do it is the same transmission as a Turbo Hydra-Matic according to my Motor's repair manual.