You need to use a dial type torque wrench when taking it loose and see how much torque is required to turn the pinion, so you know how much to put on it going back together. If it is already off, the only proper way to re install it is to replace the pinion bearing crush sleeve and set the rear end up all over again.
Important: Observe and mark the positions of all the driveline components relative to the propeller shaft and the axles prior to disassembly. These components include the propeller shafts, drive axles, pinion flanges, output shafts, etc. Assemble all the components in the exact places in which you removed the parts. Follow any specifications, torque values, and measurements made prior to disassembly.
Important: Do not damage the axle housing sealing surface.
Important: When replacing the pinion oil seal and/or the pinion flange/yoke, observe the following guidelines:
Important: Install the pinion gear flange/yoke to the pinion gear shaft in the same position as marked during removal in order to maintain correct driveline balance.
Notice: Do not hammer the pinion flange/yoke onto the pinion shaft. Pinion components may be damaged if the pinion flange/yoke is hammered onto the pinion shaft.
Important: If the rotating torque is exceeded, the pinion will have to be removed and a new collapsible spacer installed.
Tighten Tighten the nut until the pinion end play is removed. Rotate the pinion while tightening the nut to seat the bearings.
Tighten Tighten the nut in small increments, as needed, until the rotating torque is 0.40-0.57 N·m (3-5 lb in) greater than the rotating torque recorded during removal.