I have a question, maybe someone can help. I recently had my rear drive shaft apart to replace the u joints. It is the two piece shaft with the carrier bearing over the transmission connected shaft. The problem is I had the nut that holds the yoke which goes over the splines removed by a shop and Im not sure they put it back on the same splines. Right now when i bolt up the drive line and get the u joint on the transmission side sitting like a cross (+), the yolk and u joint on the differential are sitting like an ( x ). My question, if anyone has 5 minutes to spare, is on your rear driveline when your transmission end u joint is vertical like a cross, is the u joint on your differential also vertical? Or do the front and rear joints not sit square with each other? If anyone could let me know it would help me a lot in getting this vibration to go away.