Hi guys I have a question, I am a bit confused on how the Quadra Drive system works. I have a 2004 Jeep grand Cherokee Quadra drive and last year they replaced my rear differential with another one. Now that I’ve gone off roading going through twist only my front driver and rear passenger works, or vice versa depending on the twist. I’ve been thinking either they did not put a Quadra drive rear differential with a vari lock or the clutches went out. I’m inclining more that the clutches did go out, because lets say they did not install a Quadra drive rear differential, the front one is a Quadra Drive differential and both front tires should be spinning correct?