Rear Axel Info ?

[martin.ca]

No idea what the Spline # is on your axles.

http://minneapolis.craigslist.org/csw/p ... 85580.html

"For sale is a good used 3.42 ratio GM G80 posi unit from a 1998 Chevrolet Camaro 7.5 inch rear end.The ring and pinion surfaces look good. Will need new bearings, crush sleeve, and races when you put it into your vehicle. Call Terry at: 320-491-3773. Located in Alexandria. Thanks."

 

[CHRIS.O]

I would buy that 8.5. If you rebuild your rearend, bearings, gears, buy a posi and then have to have to pay to have the gears set up your half way or more to the price of that rearend which is already rebuilt. If the brakes are good on the 8.5 thats another bonus. Good Luck.

 

[cutty651]

thanks guys but ya chris i gonna do that if he still got it i call twice today no answer so try again tommarro but ya i agree allready done and ready to go sounds good to me after watchin the video on youtibe on how to change gears and pinion def gonna need sum special tools to know how many shims are needed and a press for bearings so with all that would be much easier even though would like to learn but mabe later 8.5 g/n is wat i wanted anyways and its only about 3 hr ride i let ya know wat i get and martin wat u want for that posi unit and will that go right into my 7.5 ? thanks for replying everybody much appreciated

 

[cutty651]

oh ya and its a 28 spline 2.41 7.5 martin and chris are the brrakes etc the same as the cutlass cause i bought all new callipers brakes slotted rotors drums master cylynder etc all the fixins new lines everything for my cutlass so couldnt i just swith them over to the 8.5 if i get it or they different ? cause if so man i got already over 500 prob into all my brakes already not even used yet ?

 

[cutty651]

although most money is in the front brakes so the only lost would be drums and all the inside acc. so i guess not that big deal

 

[cutty651]

dang chris u got me thinkin on that 8.5 12 bolt will that fit right in to a 1981 cutlass and u saying to just get that posi unit and throw that into it i here alot on hear guys sayin 12 bolt is the way to go but wat do i know about rear ends so or is the g/n a 12 bolt too thanks

 

[CHRIS.O]

The Gn rear end should be a 10 bolt 8.5. Which is plenty strong enough for all but the all out race cars and even then some people still run it. I am not sure about the brakes. I doubt they are the same but like you said it is not a big deal. The gn rear end will swap right over. No other 8.5 or that I KNOW of will swap over without some modification. If that gn rear end is gone keep looking for another or for a 7.5 that is already posi and ready to go. You will find that most of the time stuff is cheaper to buy already to go as opposed to rebuilding it all your own. Good Luck.

 

[cutty651]

Thanks Chris Going To Call Today So Hope He Answers And Ya It Will Never See Track Just INTOWN Racine lol no but if i ever change motors witch prob wont i just want the right rear for that option just to be curious wat modifaction is needed longer control arms or and hers on hear that umni makes a swap kit for sum like that not sure if its the same rear they tallkin about but ya prob wont go that route just curious how much work is actually needed to be done to make that 12 bolt work but ya hopefully the guy answers cause like u say that would drop right in now that i like cause i aint no rear end mechanic god knows that thanks again chris u been alot of help to me very very much appreciated i dont know what i would do half the time with guys like u in this forum very helpfull thanks. oh and again what gear ratio would i be lookin for they say 3.73 or 4.10 ? or is that not a big deal unless u at the track it has 20" rims if that makes a difference in ratio dont know ?