[Ant]

I have mounted my 8.8 on the same angle as the engine/trans, so if the engine is pointing down slightly the diff should point up the same angle, so in effect both centrelines are parrallel. Also driveshafts should never be straight as the needle roller bearings will wear in one place and brinelling or excessive wear in one spot will occur.

The operating angles on each end of the driveshaft should be equal to or within 1 degree of each other, have a 3 degree maximum operating angle and have at least 1/2 of a degree continuous operating angle.

When the transmission output shaft centerline and axle input shaft centerline are parallel, the u-joint operating angle permissible is length of driveshaft divided by five. Example: A short coupled driveshaft with a 15" length would be limited to 3 degrees maximum operating angle. A 30" shaft would be limited to 6 degrees.