700R4 / 4L60
At approximately the same time as the 200-4R's release, the Hydramatic 700R4 was introduced 1982 for use in Chevrolet/GMC vehicles.
The gearing for the 700 is (commonly rounded off to 3.06, 1.63, 1.00, 0.70, and 2.29):
First - 3.059
Second - 1.625
Third - 1.000
Fourth - 0.696
Reverse - 2.294
Initially, the 700R4 was not considered a strong transmission, since the torque of a 350 in³ V8 would lead to transmission failure. The original version of the transmission had a 27 spline input shaft - this was but one of many possible and common failure points with the early transmission. However, the design was continually refined and upgraded, and in 1987, the 700 was used behind a 350 small block V8 (from IROC-Z Camaros to pickup trucks).
Without pictures, the 700 can be identified by the oilpan having a rectangular shape being longer front-to-rear than side-to-side and held to the transmission by 16 bolts, 3 bolts front, 3 bolts rear, 5 bolts left side, and 5 bolts right side.
wikipedia.com
there are billions that many of you have probably not heard of that are out there
including 200c 250c 375b 375a 425 475
and so forth, theres more
we could be here all year discussing what each one is and the differences
and to make it even more confusing GM decided to start changing tranny model names in the late 80's
but you can search on google and find out for yourself, its not difficult, theres tons of this info out there all over the place to learn you GM transmissions
however here is a REALLY good start:
http://en.wikipedia.org/wiki/List_of_GM_transmissions
i have owned one of each except for either variation of the 375
A= appearance of a th400
B= appearance of a th350
the 425 was the front wheel drive in the olds toronados and im pretty sure one of the caddies, but ive forgotten now for sure, i might be thinking of the later FWD caddies in which is when the 425 would not have existed
the 475 is the heaviest for light duty use and is a 400 but with straight cut teeth in it
i have a couple pics of one i pulled from an 87, in my pics galleries if you want to see, but its identical in appearance to a 400 except its a hair longer, in 87 it was called the 3L80HD and has HD cast on the bellhousing
im saving it for a rainy day when im bored with a th350 or 700 or 400 or something else and want to cut a driveshaft down and throw it in
we could spend all year discussing GM transmissions
it is a huge area of discussion
http://www.s10blazers.com/transmission.htm
http://www.nastyz28.com/transid.html
good luck
