Let this long bar carry through and come to rest on the bottom of the battery box. Place a socket on the pinion nut and some type of long bar, bolted to the diff flange. It is nearly impossible to judge the resistance to turn because as soon as you begin to rotate the pinion, the crown wheel begins to turn, too.

The pinion can become loose - it should have some resistance to turn - a preload of about 12 lb-ft. Two of these involve you: Tightening the pinion bearing, and replacing the washers behind the spider gears. There are only several easy repairs you can make to a differential - after that, it's best to replace the entire diff unit. I know this information arrives later than you had hoped. How hard is it to replace the pinion bearings? Is there a good source of instructions for this? I can feel pinion bearing slop in the rear flange. If I let off the throttle I get no noise until it starts to decel. I get a whine when I accelerate that increase in pitch from 35 to 40 MPH I get a different whine when I decelerate. I am experiencing what I think is pinion bearing noise in my 77B. You can also use the search bar below to find answers to technical questions!

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