Quote:
Originally Posted by Bob Mulry
You could almost get away with an AAMCO rebuilt TH-350 trans for 700HP if all you want is strong........
Bob
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I'll just assume that your statement is just an exaggeration. When I got my 1st 455 Pontiac engine I was not aware that 500ft lbs of torque would tear up a bunch of stuff.
A local racer had an 11 sec sbc Nova, with a TH350. He decided to switch to a Glide. So I bought his TH350. The TH350 had worked just fine behind his sbc. But that was because it had very little low end torque. But my 455 had about 500ft lbs @ 3000-3500rpm.
So, on the first 1-2 shift, it broke the int sprag race.
So, I checked around and was told that big blocks needed a hardened sprag race. So, I bought one from TCI. I figured that would fix the problem. But apparently the hardened race was just more brittle. It broke into several pieces on the first 1-2 shift.
So, I had a another stock race put in it and sold it to another sbc racer. So to say a stock rebuilt TH350 will hold up behind a race engine with 700ft lbs of torque is ridiculous. If you can do it, fine. But 99 & 9/10 % of other racers can not get by with a stock rebuilt TH350.
There are several tranny guys who advertise TH350's good to 800hp or a little over. But I decided to ask some of you class racers about it. I assume that some of you guys with big block engines are making over 500ft lbs of torque and are using a TH350 to run a little quicker than with a TH400.
http://www.atiracing.com/products/trans/350/
http://www.atfspeed.com/store/index....x&cPath=193_53
http://www.coanracing.com/Catalog.as...uctDetail=1585
http://www.jakesperformance.com/TH350.html
On another site someone ask what tranny would hold up behind his 700hp long stroke Pontiac engine that will also have around 700ft lbs of torque. When I mentioned a TH350, several guys jumped on it saying "no way". Since I'd read on this site about you guys using TH200's and TH350's, I decided to ask about it.
The common upgrade I read about online is a 36 element sprag and drum assembly. Some even advertise a spagless set-up. So I just assumed that you guys would know who builds these HD TH350 for most of the SS racers that will survive high torque race conditions.
http://www.summitracing.com/parts/tci-327900/overview/
http://www.ckperformance.com/List/GM...missions/TH350