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Drivetrain => Transmissions => Topic started by: Jim on January 03, 2022, 12:59:16 PM

Title: 400 trans
Post by: Jim on January 03, 2022, 12:59:16 PM

Hi ,just got a good running st400 (20years ago) so who makes the best overhaul kit  any real problems to look for /up grades? Jim

Title: Re: 400 trans
Post by: GS66 on January 04, 2022, 10:31:10 AM

We have one in one of the 66 GS cars. Works great, only upgrade I did was a B & M shift improver kit so it chirps the tires when shifting to second manually under heavy acceleration. Finned aluminum pan will aid cooling.

Title: Re: 400 trans
Post by: Jim on January 04, 2022, 03:30:23 PM

Hi ,it's even sitting so long I at least want check it over  all new seals anyway,clutch pack.  Jim

Title: Re: 400 trans
Post by: gssizzler on January 04, 2022, 07:32:21 PM

Oregon Performance Transmission, Cars,and Fatsco are good sources I would check current reviews ! As far as tech and questions I had the easiest time with Fatsco! Got parts for both st300 and th400 from these vendors! If you have a trans shop in town usually they can recommend vendors also! I would also post this ? On V8Buick site also!

Title: Re: 400 trans
Post by: Jim on January 17, 2022, 11:21:51 AM

Thanks ,now I can move on to the puffing  smoke when starting after its warm.Jim