I have been having the same issue with my Bravada as well as having VERY poor MPGs. The first thing I did was check the transfer case fluid, and it already had the correct blue stuff, but I changed it just to be safe. It helped a little with the wheel binding, but not much and did nothing for my mpgs. So today, I pulled the encoder motor off to see if it was sticking. It was so corroded, that the housing was rotted through and the gears were all full of junk. So i assumed that it has been stuck in all wheel drive. I drove it with the front drive shaft removed, it feels soo much more peppy, but did nothing for the mpgs. im going to pick up a new encoder motor on monday and hope for the best. any ideas on why im only getting 11 mpg when i know i should be getting closer to 18.