[mohrds]

Plug in the FWD fuse and test the turns.

I had that problem and it was solved by replacing the external tranny filter and tranny cooler.

There was much debate over why it worked or if it was a coincedence. I think we finally came to the conclusion that a clogged line increases the pressure in the tranny and it is enough to push past the solenoid C and partially engage the rear wheels at times it shouldn't, like slow speed turns. The further it clogs, the more rear wheel power is in place at slow speeds.

Doug