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Old 03-26-2003, 01:15 PM
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Post what trans behind a big block?

I am in process of building my first big block chevy, and I will be dropping it into a 69 Chevelle that currently has a powerglide behind it's straight 6. I expect the 454 to be putting out about 450-500hp and was wondering what my best transmission choice might be. I have access to a TH350 (free), a TH400 ($200), and the PG that is in the car(free). All three transmissions will need performance rebuilds as they are all bone stock. Which one would put up with agressive street driving and the occaional weekend run to the track?

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Old 03-26-2003, 02:10 PM
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Chevrolet ALWAYS put the Turbo 400 behind BigBlock Chevrolets

What makes you believe that you should do any different? <img src="graemlins/sweat.gif" border="0" alt="[sweat]" />

.

[ March 26, 2003: Message edited by: Deuce Roadster ]</p>
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Old 03-27-2003, 08:41 AM
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"What makes you believe that you should do any different?"

Hehehe, thats why we use powerglides at the track?

--{Edited for stupidity of not reading the post completely.}--

Deuce had the idea though - go with the 400. UNLESS it's a strict drag car, then I'd go with a PG.

~Michael

[ March 27, 2003: Message edited by: lozinit ]</p>
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Old 03-27-2003, 01:06 PM
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[quote]Originally posted by Deuce Roadster:
<strong>


Chevrolet ALWAYS put the Turbo 400 behind BigBlock Chevrolets

What makes you believe that you should do any different? <img src="graemlins/sweat.gif" border="0" alt="[sweat]" />

.

[ March 26, 2003: Message edited by: Deuce Roadster ]</strong><hr></blockquote>

Really?? I guess my old '67 Impala had the wrong
engine/tranny combo from the factory then, right??
369/PG...yes, it was a #'s matching car...

[ March 27, 2003: Message edited by: Canzus ]</p>
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Old 03-27-2003, 07:25 PM
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I should have said :

Chevrolet ALWAYS put the Turbo 400 behind all 454 BigBlocks.

What makes you believe that you should do any different?

I know that drag cars use the PG a lot. He is going on the street with a occasional weelend at the track.

Some early BigBlock (pre 454) cars did have the PG also. Corvettes did too. This is NOT a numbers matching deal........with a 454 .......

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Old 03-28-2003, 06:57 AM
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The reason I was asking was to see if anyone thought that Chevy's stock configuration could be improved on with today's high performance rebuilds. I had a stock PG in a Chevelle behind a small block and it was a real dog. Thanks for your comments guys.
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Old 03-29-2003, 04:34 AM
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It really might just depend on how much money you are going spend on a rebuild. I have had a stock th350 rebuilt with every heavy duty part you can put in it, installed by a very knowledgeable tranny man. I used it in my 3/4 ton suburban with a 454/ 400 horse, for pulling in competition. The sled weighs 29,000 pounds, and I beat the hell out it and never havehad a problem. I don't know if that is much of a comparison, but the idea is to help you make a decision. right?
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Old 03-29-2003, 09:40 AM
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You'll get the biggest bang for your buck with a TH400 - FOR SURE!

Why do you think they put 'em in the early big block Cameros - just for the fun of it?
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Old 03-29-2003, 10:16 AM
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You would be lucky to see anything other than a th-400 in ANY GM powered monster truck.
Have you considered the option of selling your PG and using the money to build the 350 and in the process coming out ahead.
There are so many opinions out there that sometimes you have to ignore them all and use your own judgement, I have all three transmissions here in my shop plus some manuals and it all depends on what the owner wants and the vehicle needs.
I know a guy that put a chevy truck 292 straight six with a 465 granny low 4 speed truck trans in his monte carlo because he pulled trailer, and around here it's all hills.
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Old 04-01-2003, 09:33 AM
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Mark,
TH400, I have a 68 Camaro w/a mild dependable 520hp 454. I have a th400 w/ a B&M kit and TC1 2000 stall and a ford 9" w/3:50. Been driving it for 3yrs now, about 5,000 mi. and to the track 2-3 times a summer. Even running slicks the th400 is holding great. The only thing I'd change is a little more stall and alter the valve body to hold it in low. But hey, this is a street fun car first, then a racer.
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