LS1GN said:The 4L60 and the 700 R4 are one and the same. The 91-92 or maybe 93 are the best, have the most updates before GM converted them to electronic/computer assist. These newer electronic ones are called "4L60E" and need a brain to run them. The older ones (up to 93) just use a simple throttle valve cable.
IIRC the early ones (early 80s) had weaker input shafts and other little gremlins. I have a built one that originally came out of a 1992 Roadmaster. Some people (on this board) will suggest that a 200-4R is inherently better, but based on my research they are about the same, and both need to be strengthened before put to extreme use. 700s and their parts are much more common and less expensive than 200 parts. A 700 also has a removable tailshaft housing and two or three choices for mounting to a X member. The 200 4R has an integrated T/S housing and consequently no mounting choices.
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