Well, the rear axle bearings on my '81 TD were a royal PITA. I bunged up the threads on the inside of the axle assembly on one side when I pounded it out. Had to file them true and even then the locking nut turned real hard. To top it off, I over tightened the crush washer, had to order another one and take it apart. Again.

After it was all done, I realized that it was a stuck brake pad that overheated the rotor, not the bearings.

R&R the starter was also alot of fun. That top bolt is a bear. Why did the German engineers use Allen head bolts? Regular hex head bolts would have made the job much easier.