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Mod | | | Forums66 Topics128,049 Posts1,055,698 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Dec 2003 Posts: 299 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2003 Posts: 299 | Can you use a torque converter from a 350 turbo in a 400 turbo? | | | | | Joined: May 2005 Posts: 145 Wrench Fetcher | | Wrench Fetcher Joined: May 2005 Posts: 145 | Yep, no problem. Now, what-cha up to?
mv | | | | | Joined: Oct 2005 Posts: 40 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2005 Posts: 40 | I disagree with mike. t400 torque converter is different than a t350. There is a 1/2 inch difference between the two input shafts. | | | | | Joined: May 2005 Posts: 145 Wrench Fetcher | | Wrench Fetcher Joined: May 2005 Posts: 145 | I just double checked some part numbers on the B&M site. If you check part #20480, it fits TH350, TH375, TH400 & TH425. I think there *were* infact, TH400 with a different input shaft (as mentioned) in the early 60's. Don't hold me to this, but I believe they were compatible with the early *switch-pitch* converters.
As a related sidebar, in the 80's I had a friend with a budget 427 Chevelle drag car who ran a 10-inch junkyard Vega TH350 convertor in a TH400. I don't condone using stock Vega converters behind BBCs but it works! er, for a while anyway <grin>. It stalled around 3500 RPM for 2 seasons, then started getting looser in the middle of the third summer of racing. The cars slowed at that point too.
MV | | | | | Joined: Mar 2004 Posts: 3,068 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 3,068 | A buddy of mine ran the Vega converter in a mud runner for several seasons. As long as the tires were spinning, he had no problems. The truck was not street legal so it held up well.
Scott | | | | | Joined: Oct 2005 Posts: 40 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2005 Posts: 40 | Sorry, thought you were talking about stock converters. I put a t400 into my 84 chev and it didnt work, but like you said it was an old t400 that i was using. | | | | | Joined: Dec 2003 Posts: 299 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2003 Posts: 299 | thanx guys,any other input is welcome.
Lothar
PS, the weather is great here in the lower mainland right now ,eh Motorhead?Are you going to the Langley cruise in in Sept? | | | | | Joined: Jul 2005 Posts: 25 Junior Member | | Junior Member Joined: Jul 2005 Posts: 25 | In 1984 the trans would have been a 350C which
is a 350 trans with a lockup converter. The input
shaft on the 350C is longer to supply oil to the
lockup clutch. The 350C converter will not work
with a 400 trans. From the info I've seen the switch pitch converters were not an option in Chevy models. The converters from a 350 or 400
are interchangeable.
Arnie | | | | | Joined: Oct 2005 Posts: 40 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2005 Posts: 40 | :
Are you going to the Langley cruise in in Sept? [/QB] id like to but truck wont be ready till next summer. | | | | | Joined: Dec 2003 Posts: 299 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2003 Posts: 299 | I've gone 3 out of the 9 times ,just because I look to see how other AD owners have built their trucks.It's the only run I ever go to,because they usually have about 1500 vehicles and it's free(the best part)I never go to any other shows because they rarely have any AD trucks and they charge too much.I have some spare parts,if you do too ,we could trade off some of our uneeded parts,seeing as you only live about 1/2 hour from me.
Lothar | | | | | Joined: May 2005 Posts: 145 Wrench Fetcher | | Wrench Fetcher Joined: May 2005 Posts: 145 | Thanks arnie, that makes sense re: the TH350c.
mv | | |
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