[Edahall]

Originally Posted by kikkegek

thank you thank you thank you....that makes me very happy...

funny though that my tranny comes of a 87 K5 Blazer. So it must have been replaced...still would like to know what the rest of the numbers mean

It was common for these transmissions to be replaced behind a V8 engine or even more so behind a diesel engine. They were just not very strong (in stock form) when coupled to a powerful engine. There were many variations of this transmission made and many different applications as well. They were used behind small V6 engines all the way to high torque 6.2L diesel engines. They were very reliable behind V6's and it was common for them to last 200k+ miles, but behind a diesel, they often were very short lived. The last 700R4 on my 1982 Suburban lasted 10k miles so that's when I upgraded to a newer 1989 700R4. I had all the upgrades done to it at a very reputable shop and so far, it has lasted admirably well. It's wonderful that the aftermarket took a hold of this transmission and developed upgrades that make it much better than in stock form.