Help determining a differential
 

Hey all,

I have two differentials that are already removed from the cars. I thought they were both open, but one might be posi/lsd and i wanted help determining. The reason I ask is one spins in the same direction while the other spines in opposite directions. No S on either.

The one in question is a 4.44 from a 97 auto. The tag reads 444v7092

When you spin one side, the other sides spin in the same direction.

From the previous differentials I sold, this should indicate that this is posi/lsd. I dont have the vin of the car anymore, its been awhile since I had it.

The other is a 3.45 from a 96 manual, and it spins in opposite directions.

Any reason why these too differentials act different but neither indicate why? Is there a way to tell the difference if I open them? if so, what am I looking for? thanks in advance

Excellent post by CoolJess about what the different diffs look like when you take the cover off. That'd be the easiest way to be certain.

http://www.318ti.org/forum/showpost....4&postcount=91

Thank you, this is exactly what I was looking for.

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Update:

Despite the two differentials turning different, opening them reveled that they are both open. I would say that that the direction of the shafts spinning is NOT a good way to determine if a differential is open or LSD. The lack of any attached wheels, which causes resistance, could have played a factor in this but everyone should keep this in mind while buying an LSD. If the differential is removed from the car, you should look for an S or open the case.

Thanks a lot