What diff is this?

[Aussie Coronet]

I just pulled this from my 69 Coronet. It does not match anything on my mopar diff ID guide, closest is maybe an 8 1/4?

Some people have said its a Chev 10 bolt?????

I have checked on a Chev Differential ID page and where the Chev 10 bolt is supposed to have casting numbers, this diff has none, so maybe it isnt a Chev 10 bolt after all?

It may be an Australian Chrysler Valiant diff as the car has been here for 4 years but I doubt it as the diff U-bolts needed to be replaced a few months ago and they were rusted on so bad a plasma cutter was required to get them off, they looked every bit of being there for decades!

I checked the stud pattern, same on front and rear.....but of course that just means the front disk rotors might also be off a Chev knowing my luck...

Anyway, if you are certain you know what it is please let me know. If its Mopar I can at least hold onto it until I can afford an 8 3/4 but if its a Chev diff then its gone!! The little tag on the bottom of the cover appears to read 2.71

 

[Deleted member 214]

Built by the Dana Corporation, the housing is cast iron with tubular steel axle tubes pressed and welded in to form a complete carrier and tube assembly. The gear assembly is accessed by removing an inspection cover having 10 bolts. 8.25" axles use either the "7260" or "7290" style U-joints. All 8.25" rears had 3" axle tubes with large bolt pattern (5 X 4.5" bolt circle) axles. The 8-1/4" has 10 bolts holding an inspection plate to the rear of the housing. The 8-1/4" rear can handle most 340/360 applications. NOTE: removal of axles requires pulling the rear inspection cover, removing the spider gears, pushing the axles inward, and pulling out the C-clip axle retainers. Looks like they were used in a variety of cars from the late 60s through the 70s and even Jeeps later on - http://www.jeep4x4center.com/jeep-axle-differential-parts/chrysler814-rear-cherokee.htm. Maybe that is what you have.

 

[Aussie Coronet]

I think you're right, Greg! Thx

 

[moparmarks]

Plus the pinion snubber is a Mopar give away, right? Can't think of any other make that used it.

 

[arizona satellite]

I was thinking old AMC, def nothing MoPar ever put in a B body. looks something like a dana 20.

 

[65 Dartman]

2 things tell me this is a Mopar 8.25 rear end - the flat area on the bottom of the housing and the vent tube. I have an A Body 8.25 built that's the same (except for the actual width) that I'm converting to Jeep Grand Cherokee disc brakes.