Want to swap th400....

[fleming442]

The guy said he had a 307; that's why I bought it up. I have a BOP 400 core I'd let go cheap, but I'm not shipping it.

I found a chevy turbo 400... Still got the stock 307...

 

[Wageslave]

I would be more worried that it takes about 35 more horsepower to turn a Turbo 400 than a TH350 or 200 metric. That 307 doesn't have a ton of power to spare to be just donating it to drivetrain losses.

 

[fleming442]

I would be more worried that it takes about 35 more horsepower to turn a Turbo 400 than a TH350 or 200 metric. That 307 doesn't have a ton of power to spare to be just donating it to drivetrain losses.

SSSSSHHHHHH!!!!

 

[lilbowtie]

I haven't seen any concrete numbers on HP but this is what they say they take -

PG 15-18 HP
350 35-36 HP
400 44-45 HP

If I could swap out my 400 for a 350 and gain 35 HP it would have been done a long time ago - It will get a PG in the near future.

 

[airboatgreg]

400 is a good trans but a gas hog. A 200 can be built to be awesome. Buy once cry once

 

[Wageslave]

I haven't seen any concrete numbers on HP but this is what they say they take -

PG 15-18 HP
350 35-36 HP
400 44-45 HP

If I could swap out my 400 for a 350 and gain 35 HP it would have been done a long time ago - It will get a PG in the near future.

35hp may have been a bit optimistic, but I was going from memory. I do remember that the TH 200 was pretty close to the Powerglide in weight and rotating mass. It obviously needs to be modified to handle much power though.

 

[olds307 and 403]

Which is why, if you can eat the cost and find a good builder, the 2004R is the best of both worlds. A better first gear, the same as his 200 and the .68 OD allows decent gearing added. There are a lot of BOP TH400 cores out there, unless he is planning big power, why? As said, the TH250/350 regular or C was the direct swap done many times in place of the weak and troublesome TH200.