hey folks.... its been a while since I've been on... WAY to long to read through all the old posts. I moved to northern Cali where no broadband is available, so I haven't been online for the past 2 months.
Anyway, just wanted to post some info I just got on late model transmissions. If any of you guys remember, I had a new tranny (4L60E) put in my truck when I bought it (@ 39k miles). Well, its only been 19,000 miles on the new tranny and my the clutch packs (3 and 4) in overdrive AND 3rd are already virtually non-existant. Had to drive 35 miles in 2nd (40 MPH @ 3000 RPM, painfull) Anyway, the 3rd tranny is going in my Tahoe as we speak. Those of you folks with late model half-tons should consider a tranny build-up (corvette servos, clutch packs, trans shift kit, etc...) before 50k miles (BTW: that will void any transmission related warranties).
Anyway, the info I wanted to share was for anyone considering/researching a 4L60E to 4L80E conversion - unfortunatly, its' probably an impossibility >> IF << you want a street/smog legal truck. The 4L80E not only has different connectors, requiring a different wiring harness, but the computers are also incompatible. Furthermore, the 80 is a little longer than the 60, therefor modifications to the yoke/drive shaft would be required. This was all according to a very helpfull GM Service Rep. I was speaking with today while I was in search of a long term, reliable tranny. The conversion can be done, but it probably would not be able to be smogged - especially in the more strict states.
Just thought I would share the info I found... I finally broke down and bought a modem until broadband is available so hopefully I'll be able to swing by the board a little more often than I have been.