Need help identifying 8.25 SG diff

[JoePole]

Hey all,
I bought an 8.25 sure grip differential last year. It's a 27 spline and I was told it came out of a Duster. The numbers on it are 18-05-039-901. It's a spring type and it looks like a factory piece from an web search but I can only find info ending in 903.
Need to know who makes it and what gear can be used with it.

Thanks.

 

[wyrmrider]

how many teeth on the gear that it came with, that will tell you what range gear you can install
one is only for the low 2 series gear so you realistically have two choices high ratios or low ratios

 

[JoePole]

It did not come with a gear. Was the SG unit only.

 

[wyrmrider]

http://www.drivetrain.com/parts_catalog/ring_and_pinions/chrysler_8.25_ring_and_pinion_sets.html
says 2.71 and up cases are the same so it depends on the case not the posi
I have a 92 V8 Dakota with a posi but would have to check the FSM to see which one I have 3:54 gears
site has a list of posis how many splines?

 

[JoePole]

http://www.drivetrain.com/parts_catalog/ring_and_pinions/chrysler_8.25_ring_and_pinion_sets.html
says 2.71 and up cases are the same so it depends on the case not the posi
I have a 92 V8 Dakota with a posi but would have to check the FSM to see which one I have 3:54 gears
site has a list of posis how many splines?

 

[JoePole]

Mine has 27 spines which is the pre 1996 sure grip. That also matches what the seller told me but I have no way to contact him. Not sure how accurate that site is because they say the 8.25 was first used in 73 and that is not correct.