i just bought a 2006 XK limited 4.7 with a QD1. from what i have read it seems its not the optimum chosie of t-cases but it was priced right. im still getting used to the ride after selling my 01 xj wow what a differance. this is going to be my DD for now, my fun truck is a 87 MJ. i will most likely be putting a lift on the XK come spring or early summer. not sure what direction ill take it but i want to be able to wheel it lightly anyhow. there is lots to read here and am looking forward to getting some good advice.