Is there any way of knowing what exact code a rear diff is going by the numbers written on it? I had heard there was a way of de-ciphering the numbers but cant find anything on the net. I have about 6 diffs all in a big pile on my garage floor, mixture of 5 and 6 speeds both uk and jdm and really need to sort them out.
Cheers

 

Anyone??

 

Only way I know is removing the rear cover and the ratio is stamped onto the pinion gear.

Apart from that I really don`t know.

 

As jimbob says

 

Ok thanks guys, there is a thread suggesting it is possible somewhere on NASIOC but I can't find it again. Nice trick with removing the cover tho, will get me out of trouble.

 

The uk spec r160 diff in my garage is 3.545 code is BJ if theres one of those