I believe the differential gear (bevel drive gear) in the &quot;bad&quot; rear end is good. What is not good is the &quot;bevel pinion gear shaft&quot;. When someone failed at their attempt to repair the chipped second gear they welded the nut that retains bearing and the shaft at the front end, essentially ruining the bevel pinion shaft. 

The rearend would be good except for the bevel shaft, &quot;second gear&quot; (teeth ground off), and the mating gear on the countershaft (chipped teeth). I was planning on breaking it apart and potentially selling the stuff to recover some of my expense in purchasing the replacement rear.

I think I can get it apart without having to pull the pinion shaft. Its finding the time to do so that may be difficult for me right now. If your in a hurry I would suggest locating it from someone else. 

I do know there is a source for parts that posts here on the forum. He's in Texas and parts out 55's and 550's.  

Jeff