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Re: OT GM 700R4 Tranny problem
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Posted by jdemaris on March 02, 2007 at 13:50:30 from (66.218.15.19):
In Reply to: Re: OT GM 700R4 Tranny problem posted by Allan In NE on March 02, 2007 at 13:32:10:
My local Chevy dealer (probably the smallest dealership in the country) refused to sell any trucks - gas or diesel - with a 700R4 and a tow hitch until after 1985. If any towing was threatened, he pulled the 700R4 and stuck a TH400 in - along with an different shaft in the 205 transfer-case.
I can remember - just barely- when the TH350 first came out - it had just as high a failure rate. The 700R4 IS, more-or-less a TH350 with an added gear and lockup converter. I think (but I wouldn't swear to it), the "350" stands for a 350 lb. ft. torque rating, just as the "400" from the TH400 denotes a 400 lb. ft. rating. I've had a few TH400s in high-torque engines - but they were technically TH475s.
GM now claims the numbers in the new metric-designated transmissions denote the max. torque ratings. If so, I've been wondering 60-what from a 4L60, nad 80-what from a 4L80? I assume the 4L80 is the old TH400 with an added gear and lockup - and if so - what is 80? Can't be lb. ft, can't be Newton Meters, so what the heck is it?
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