Rear Differential color..

[Deezal Man]

When my mag-hytec cover wouldn't stop dripping, I decided to take it off and see what was wrong. The answer was obviously due to the stampings on the case itself. So I filed them off and all is well.



Anyway, I noticed the housing that holds the spider gears was discolored in the area where the spider gear shafts are held in place. Discolored in a way that looked like it had seen some really intense heat at some point.



Why didn't I notice this last week when I installed the cover??

Doubt I put 25 miles on the truck total this week ?...



Considering the truck has a posi rear... . How could those spider gears turn enough to create that kind of heat? The ring and pinion gear look fine. The magnet didn't have chips on it... . just the usual metal dust. .



I showed the neighbor and he thought it might have been that way from factory. Possibly from the manufacturing process.



Can anyone confirm?

 

[EMDDIESEL]

Have not had the cover off mine, so i cant say if mine has it too. My best guess would be heat treating?. They do alot of stuff to strengthen metals these days, so it could be that, all though it seems strange that you would need that area treated in such a way.

 

[Pete Peterson]

Just the tempering on the parts, Mine was that way when I had the Mag-Hytec cover put on and the factory fluid changed out. The fluid wasn't burned up and the factory fluid is not the best in the world, so I think your okay... ... ... ... ... ... Pete