For my 72...TH350? TH400? Powerglide?
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Joined: Mar 2001
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From: Pekin, IL
Car: 91 Formula, 79 Trans Am, 72 LeMans
Engine: 305 TPI, 6.6, 350 Pontiac
Transmission: T5, 3 speed, TH350
For my 72...TH350? TH400? Powerglide?
Ok, as most of you know, I am building the LeMans up. My concern right now is what tranny should I use. The engine is a SBC 377 (destroked 400) with aprox. 550-600 HP. The rear end is a 9-inch with 4.56 gears and a spool. What would be the best for this car. Thanks.
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
To get that much HP out of a 377 you should be shifting around 7500 rpm.
How much will the car weigh? If it's over 3000 pounds then go with a TH400 no matter what you intend to use it for.
If it's going to be a strip only car go with a PG. If you intend on driving on the street a well built TH350 will do but a TH400 would be better.
How much will the car weigh? If it's over 3000 pounds then go with a TH400 no matter what you intend to use it for.
If it's going to be a strip only car go with a PG. If you intend on driving on the street a well built TH350 will do but a TH400 would be better.
Thread Starter
Supreme Member
Joined: Mar 2001
Posts: 1,754
Likes: 0
From: Pekin, IL
Car: 91 Formula, 79 Trans Am, 72 LeMans
Engine: 305 TPI, 6.6, 350 Pontiac
Transmission: T5, 3 speed, TH350
The car will be completely stock looking, so full interior and what not. So probably 3600 pounds. I have an extra TH400 availible too. So I will probably use that. Thanks
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