Can you help identify this differential?

[jedi420]

can any1 identify what differential this is? gearing? looking for a diff for my m20swap

Edited January 29, 2018 by jedi420

[AceAndrew]

No, you need to make more of an effort.

 

 

Here's a quickie on how to tell diff ratio.  If it's stock and early (going off of the rear cover) it's a 3.64, which is nice for an M20 swap.

 

 

 

[Conserv]

 

 

Lots of meaty threads on this topic.  Try search.

 

The only (currently) useless numbers are the ones cast into the bottom of the housing!  Yours is a short-neck differential with four-bolt side covers, so 1968-1978.  The large gaps between the side covers and the output flanges further suggest it is an ‘02 diff (1968-1976), not an early e21 diff (1975-1978).  And Andrew’s comment regarding the rear cover, assuming it’s wearing the original rear cover, further narrows the likely date range to 1968-1973.  Dollars to doughnuts, as Andrew says, it’s a 3.64 open diff.

 

Regards,

 

Steve

 

 

Regards,

 

Steve

 

 

[TobyB]

....and using my psychonic powers, I think that the spider gears are at least a little galled, if not really whacked.

 

The 168 diff is relatively stout, but the center section of it is not.   Burnouts cause it to... no, not burn out, chunk up.

 

For a swap, the later E21 diff is significantly more durable- and it's usually a 3.91, which might make an M20 wind a bit.

 

Andrew has a biggie thread that has all the dee- tails.

 

t

 

[Buckeye]

Not a bad thing, but looks like the diff has been worked on before.