3 year ordeal is OVER! I have 4x4 in forward and reverse. Over the last 3 years my truck had 4x4 in forward but not reverse. The shop that rebuilt the transfer case twice and took it apart 4 more times was unable to fix it. GM dealer charged $400 for a speed sensor, but did not fix it. Finally, in the last storm I lost 4x4 totally and took it to Wayne Transmission. Turns out it was rebuilt with the wrong parts. Each one only 1/1000th of an inch off, but added up to failure. If you need transmission work I highly recommend Wayne Transmission. I do not recommend any shop in Madison. read more