guys, i need help iding a "posi id" i bought on t.c. it is supposed to be a 12 bolt 3 series(chevy). i cant find any info on this chunk , please advise here is all the id i can see on it "703", b13AA , 31aou, r 2. it doesent have the big springs like the eaton ones just some sprung latches. any info would be appreciated. i think i got taken for a ride :mad:

What does it look like? Anything like in this link? http://www.canadiandriver.com/articles/jk/070912.htm

From the description it sounds like a more modern "gov lock" locking diff. Very different than the old clutch style units. From another source:

"Eaton locking differentials use small spring loaded weights that spin when one of the axles spins. The weights fly out and catch on a locking dog. This causes a cam plate located behind one side gear to turn and force the clutch plates together, causing both axles to turn at the same speed. Put too much torque through the clutch plates, and the teeth sheer off one of the plates and the differential then operates like an open unit. For this reason, the Eaton locker is designed for low speed operation and slow acceleration. If you want acceleration performance, you would be better to use a cone or clutch type unit. Locker type differentials use regular gear oils. Do not use limited slip additives or the clutches will not work properly."

truck 12 bolt?

For a 14 bolt but is a Gov-Loc posi.

http://www.betperformance.com/ebay/072401.jpg

You bought that from someone here ? Before assuming you got hosed have you considered maybe the guy didn't know what he had ? Have you tried to contact him about a refund ? It's obviously not what you paid for. If he refuses to make things right then you got hosed...

Thanks guys, doug you got it on the head . Gov-lock, that's exactly what it is! Bandit I did try to contact him several times. Al did reach him. He hasn't been back on t c since 12/27/08'. Doug , can I use the gov- lock in my 1st gen 12 bolt ?

I did get hosed, guy won't return e-mails

If its a car 12 bolt carrier and going in a 12 bolt car housing, then yes, but it's prone to breakage (lots of small parts inside).

I really hope you didn't pay a lot and/or you get your money back.

It really helps to ask a lot of questions,get pics,do your research,know what you're looking at,and still got to have faith in the person you're dealing with.

true words doug, I did do my research & asked specific questions , made 1 bad decision tho trusting that guy! All of my purchaces on T.C. have been good experiences, I even made a freind or two....

Gotta trust someone some time. :rolleyes: