Originally Posted by 1Gary
If you do make a move to a 700R4 get a V8 one from the early 90's.The V8's have better clutches in them than the V6's.The one down fall of the 700R4's is the first to second shift where second is that much lower(numerically lower)you see a drop in RPM.I read somewhere a fix for that where you can get a closer ratio second.
Dont buy a used trans. Get a rebuilt one like one this guy sells.
Level 1 Rebuilt 700R4 4L60 Transmission 2WD or 4x4 | eBay
Its a good deal for a great trans he will also work with you to get it installed right with the correct linkage and lockup options.
He can do the close ratio upgrade but its not needed. The low first gear is great pulls you out the whole and second is your power gear. Usally works great with torque build. It is also only a little off not a major change like granny gear truck trans.
Also will let you run 1500 rpm on the highway. Really helps on fuel and noise on the road. Also makes your engine last a little longer if you need to drive it on the highway for any length of time.