just wondered what this posi unit fits. can anyone tell me FOR SURE how to tell if it will go in the 68 Camaro/Firebird rear i have??? or is it a new "metric" unit????
I'm not an "expert" but I belive thats a ratchet type from a newer rear like 80's and Im pretty sure yours will need from 72 or so and older to work. you also didnt say if its a 10 or 12 bolt
ooops! 10 bolt. i've got another GM 10 bolt with this same style unit already in it. not sure what year it is either. did'nt think it was metric but i suppose it could be.
That(68 Camaro) should be a 8.2 10 bolt. The one you have pictured wont work and are a poor design for any kind of performance use anyways.
Late model stuff is either 7.5 or 8.5 10 bolt and won't interchange with your early 8.2. 8.2 is kinda the redheaded stepchild of chevy diffs. Not a lot of performance options. For what it's worth, used posi units that fit are 30 years old now. Don't think I'd be installing any used ones without a refresh, cause it'd be a shame to waste the setup work only to discover it's been one-legging since 1985. good luck
That would be a grenade with the pin pulled. They came optional in the 7.5, 8.5, and 9.5 GM rearends. I've seen better than ten 8.5" GM 10 bolt rearends blown up because of the flyweight shafts and small parts breaking in that style of diff. Money would be better spent on an Eaton performance posi. They make one for the 8.2" 10 bolt GM. I've sold Eatons for all sizes of GM automotive/pickup rearends. I have one in my 9.5" 14 GM pickup rearend, love it.
yes those things are junk! they are usually found in late modle chev trucks and suv's get an eaton you wont be disapointed and they are fully rebuildable.
so this late model carrier AND the early Chevy rears (like the 10 bolt in my 68 Firebird) are ALL junk from what i'm gathering?? i know they are not interchangeable but seperately they are junk so neither one is a good option?? that is what i'm getting out of this. what would be a good alternative? 12 bolt?
I may stand corrected, but I think Eaton was building positracs for GM back in the real performance days. The old GM positracs with cluster of coil springs were pretty stout units, and can possibly be rebuilt. In the light duty rearend repair business, the most seen failures are the "gov-lock" posi, and everything related to the Dana 35 in Jeeps. Some of the GM cars had the "BOP" rearend. The parts didn't interchange with the Chevy rearend. Easiest identifier, pressed on wheel bearings intead of c-clip axles. Almost all the replacement parts are more expensive than the Chevy style stuff. I personally don't have a real high opinion of the 8.2 10 bolt. They will do the job just fine as long as the car isn't too heavy or having too much motor in front. It just isn't a 12 bolt. The biggest problem, today it's 2008. The good stuff was produced until roughly 1973, and folks have been tearing the stuff up on the dragstrip and dirt track for years which dwindles the supply.
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