Ok guys, got all the details on the 700R4!!!

[sam's 72]

OK, I went and talked to my tranny guy today about this 700r4, the 1st thing he told me was to go talk to the guy that built it, ( I am going to do this ) he knows the guy that built it and said he is damn good! Now this is what he said about the 700r4, they are a pile of sh!t, yes they can be built to stand up behind a lot of HP, but are very costly to build one for that, ( around here anyways) he told me that if he was in my shoes, that he would go with a 3:23 or 3:55 gear in the rear, then build the th350 with a set of lower 1st and 2nd gears, and that it would come out the gate as if it had a 4:56 that is if going with 3:23 rear gear, or it would come out the gate like it had a 4:88 gear if going with the 3:55, then when it goes into 3rd, it would be 1 to 1 with either 3:23 or 3:55 depending on what I go with, he said that the th350 will with stand a whole lot more abuse then the 700r4, and that it take a lot more money and know how to build the 700r4. so with this said, I am going to go over and talk to the guy that built this 700r4 and see what he thinks, I know I need to get my decision made soon, cause my tranny is out! I will keep you guys posted with more details later!
Sam

[ty1295]

As a person who also owns a GMC Typhoon (4.3 L turbo, AWD, LOTS of torque stock ~450ft lbs). In the typhoon world, we have mastered blowing up 700r4's, and making them last.

The biggest thing that will kill a 700, is heat. Any tranny can't handle heat, but 700 is worse. The newer 700's are better ) 88 and on. It is generally considered that corvette 700's are the best (syclone/typhoon is even better but rare) as they have bigger servo's and I think more clutchs. Without getting in too much detail, to make a 700 last when rebuilding add clutchs, add remote cooler and filter, and you should be fine.

Mine in my typhoon is a stock rebuild, with 2800 stall 9" convertor, I have spent the last 40k miles trying to blow it up. Knock on wood, it is still holding in for me.

I have a spare that is going in my 70. I think the bad name given to them, is because of other outside bad experiences or conditions, not necc. the bad design of tranny.



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Jeff Scott
'70 GMC Stepside, Short box
'67 Camaro
'63 Nova
'92 GMC typhoon

[Dean23]

Another killer of the 700's in hotrod's is an imprpoerly adjusted tv cable it causes the tranny to destruct pretty quickly. Not sure why I remember reading it in superchevy though.

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Dean
edmonton,canada
68 c10, project in works,350, th350, plain jane.
SLOW AND STEADY GETS THE PANELS READY
http://communities.msn.ca/MyChevytruckpage