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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: RebelBoy on May 19, 2021, 12:52:17 pm

Title: TH350 or TH400???
Post by: RebelBoy on May 19, 2021, 12:52:17 pm

I’m restoring a 87 Chevy and about to change the engine out to a 355 that my father gave me. Right now I have the th400 but wanna know if I should keep that or switch to the 350. Ultimate goal is to put a little money into aftermarket parts but don’t have plans of being on drag strip. Any input appreciated.


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Title: Re: TH350 or TH400???
Post by: LILT77 on May 19, 2021, 01:48:16 pm

If you already have a TH400 and it's working fine then keep that and put the money you would have spent on a 350 into the engine or rest of the truck.

Title: Re: TH350 or TH400???
Post by: VileZambonie on May 19, 2021, 03:47:27 pm

700R4

Title: Re: TH350 or TH400???
Post by: RebelBoy on May 19, 2021, 07:48:22 pm

Quote from: LILT77 on May 19, 2021, 01:48:16 pm

If you already have a TH400 and it's working fine then keep that and put the money you would have spent on a 350 into the engine or rest of the truck.

Kinda how I was feeling after talking to some today


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Title: Re: TH350 or TH400???
Post by: JohnnyPopper on May 19, 2021, 10:53:04 pm

The difference between the th350 and 400 is measurable, but if you're not into drag racing, you would benefit from the Overdrive feature of a 700R4.

They are gas guzzlers after all!!

I think there are certain year ranges that you want to select. See others for such info.

Title: Re: TH350 or TH400???
Post by: Sinister.454 on July 17, 2021, 08:42:19 pm

I'll gladly accept the fuel cost for the privilege of driving a turbo 400 powered TRUCK!
Who buys a TRUCK and wants good mpg? :-X

Title: Re: TH350 or TH400???
Post by: JohnnyPopper on July 17, 2021, 11:32:40 pm

I think the question is: Who buys an OLD truck and wants good mileage?

There was a day when it mattered.... ::)