Quote Originally Posted by CowboyErik View Post
There is a reason so many of us are having tranny problems, AND we don't know why. The General Motors 4L30E was never designed for HEAVY DUTY service of ANY KIND let alone 4 wheel drive all the time! 2WD at most on a light car/chasis! I mean never! It is not rated for that; we WILL all lose our transmission soon, everyone, no matter what year we have.
Epic failure to use the search function if this is really a new discovery for you. And I whole-heartedly disagree with the need to rebuild the transmission every 75K miles; that's just nuts IMHO. Perform transmission maintenance according to the more aggressive recommended schedule and then rebuild when needed. There are a lot of folks on this site who have gone much farther than 75K before needing a rebuild (and many still don't need them at double your recommended miles or more). You're talking a ton of unnecessary expense. Can you imagine if deermagnet, at nearly 300K miles, was about to do his 4th rebuild?