Originally Posted by tempest411

It's a little too late for that; I own the thing. I know this is a bit of a gamble, but if it needs a new transmission after all, so be it. While I'm trying to be reasonably intelligent with how I spend money on this, I'm not afraid to do so. Right now I'm thinking if a new valve body (well, rebuilt from Sonnax..) doesn't do it, I'll pull it and get it rebuilt. I may even try it myself.

With all the issues that these transmissions suffer from, has anyone fitted a GM 4L80E into one of these? It would also require a transfer case swap along with it.