Begin by installing a new front pinion bearing cup and a new rear pinion bearing cup, both using Installer 8960, Handle C-4171 and Installer 8959. Then, slide the pinion depth shim onto the pinion gear shaft and immediately attach the rear pinion bearing to the pinion with the press and an Installer MD-998805. Put a new collapsible spacer on the pinion gear and apply oil to the pinion and the bearings. Put the pinion into the housing, making sure the front pinion bearing is on the shaft and use Installer 8981 to pull the shaft into the front bearing. Use Installer 8896 and Handle C-4171 to put in a new pinion seal, then apply a little teflon sealant on the pinion flange splines. Press the pinion and gently strike the flange on until you see a few threads, then set the washer for the pinion flange and tighten the pinion nut. Clamp the flange with Flange Wrench 8979 and turn the pinion nut tight until the pinion end play is removed. Rotoate the pinion numerous times to position the bearings, measure the Pinion Torque To Rotate with a torque wrench and tighten the pinion nut by approximately 6.8 Nm at each step until the desired torque is reached for new bearings (1.7 - 2.8 Nm) or original bearings (1.1 - 2.2 Nm). With the pinion torque working properly, place the ring gear onto the differential case and install two new bolts in the ring gear. After that, insert the remaining bolts and alternate in tightening them to 237 Nm. Should the exciter ring be absent, install the differential assembly on differential Plug 8888 and hit the exciter ring on the case with a hammer and brass punch to secure it, not damaging the teeth. Set the differential inside the housing, inspect the ring gear to confirm backlash and gear pattern, measure the Total Torque to Rotate with an inch pound torque wrench using a target of 3.4 to 5.6 Nm for brand-new bearings or 2.8 to 5.1 Nm for old bearings. Should the TTTR exceed the goal, gently run one serpentine belt loose to see if you get to the target. Secure all your bearings in place, verify that the reference marks on the propeller shaft are aligned and then add the differential cover with its gasket and secure the bolts to 40 Nm. When the differential is full, tighten the fill plug to 32 Nm.