84 Camaro z28, 3.73 gears, what do i need to do to get Posi? By a new/used carrier and axles? If so what kind? can i get them used? from where?
any information would be appreciated! thanks!

 

The FAQ should be somewhat helpful:

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC

 

go to a junk yard and pull a rear off of a camaro that already has one in it. Much easier and requires no special tools : )

 

True, but finding one with 3.73's might be difficult--if that's a ratio that's important to 10second.

JamesC

 

Ya, i would like to keep my 3.73's. I read the article, it was helpful, i was wondering what all parts would i need. Say i get a 3 series carrier with 3.73s (?) and 28 spline axles, what else would i need to complete the conversion?

 

hey 10secondhopeful.. your going to need different axel if ur hoping for a 10 second car. haha What kind of tires are you running on that ride in the pic?

 

I bought my posi carrier from ebay rebuilt. I have had no trouble out of it at all. This is the seller I purchased mine from and also had it in 2 days.http://cgi.ebay.com/ebaymotors/GM-7-...Q5fAccessories

 

haha, this isn't going into the 10 second range, high 13's with headers and posi if i'm lucky. 265/50/r15 radial T/A's that are bald and are harder than hell to find new ones lol. I'm just going to upgrade to 28 spline from my 26 spline.

 

thats a damn good price. just out of curiousity, could i use the 28 spline axles out of a 91 rs 305 tbi?

 

Yes you can it states 28 spline axles. I know for sure they will work on a 91 due to mine bein a 92 with the same exact drivetrain. The 26 spline axles are smaller in dia. than the 28 splines. I do not believe there is any difference in the axle housings themselves from 26 to 28.

 

okay, another question, if i were to offer some one cash for the axles, what would be a good price?

and does that eaton posi on ebay come with bearings?

 

Last time I looked you could buy a new set of axles for around 250, Here is a set from summit for 239.00..http://cgi.ebay.com/ebaymotors/Moser...Q5fAccessories

 

Also if you like doing burnouts and just playin around another good investment would be some C-clip eliminators. That way if you break something the axles will not come out of the housing. Yes the posi carrier comes with new carrier bearings and races, C-clips, new cross shaft bolt and new ring gear bolts.

 

whew, thats alot pricier than i figured. i'd rather just go with the used ones. its a friend than has a 91 parts car, idk if he'll sell cause i think he wants to be able to move the car lol

 

Those axles would work granted the rear end has never been swapped out.

 

never heard of the eliminators, you know where i could get some?

 

no its stock, i'll see if he's willing to part with them

 

Take care that the used axles aren't unduly worn where the bearing rides or eventually the seals will leak. You could install off-set bearings, however, to avoid that situation, at least for a while.

JamesC

 

Here is a set summit sells.http://store.summitracing.com/partde...5&autoview=sku

 

I'll see what it looks like when i take it out, so they make off set bearings that would prevent leaking if they were a bit worn down?

 

Okay thanks, those would definatly make me feel better with them installed, i'm not crazy rough with my car, but i do race a lot, (we have a abandon stretch of highway we use), and would rather not have my axles coming off lol

 

If they are worn why waste the time, just get replacements and do the job 1 time. It is costly to rebuild an axle assembly and time consuming. Not to mention you by the offset bearings and new seals they may work for a while then you will end up buying new bearings and seals a second time when they go to leaking again along with new axles.

 

True, if they are worn i will buy new axles. Those C-clip eliminators are recommended on Strange axles only, is that true, if so what do strang axles run? What about a Strange 12 bolt rear end?

 

If the origanal bearing and seal surface of the axel lasted 15 years, then just relocating the bearing and seal to a fresh spot of the axel will last a good longtime! The offset bearings are just barely any more than regular new bearings and seals, and you should put new bearings in it weather or not you buy used or new axels.

aftermarket axels for a 7.5 10 bolt seem a little silly to me, considering that a good 28 spline axel is about 10 times stouter than a 7.5 inch ring gear.

 

A strange 12 bolt is pretty damn costly! You are looking at 2479.99 for a complete unit minus the backer plates and brake assemblies and those come with the 33 spline axles (super strength) the standard 12 housing with axles and bearings and seals are 1495.00 but that is no carrier or ring and pinion.

 

Ya, ..., i'll wait on the 12 bolt lol. I'm not pushing near enough power for something like that lol. thanks for the information guys

 

Yes, off-set or axle savers.

JamesC

 

Most c clip eliminators are not recommended for street use. They are designed for a car that will be drag raced. The bearings are small and not able to handle much side loads from corners. They also tend to leak oil onto the brakes.

I would get a good set of 28 spline axles and a new Eaton posi. The Eaton posi is $435. A set of bearings and shims are $45. That's all that you need to add it to your rear end. I also have instructions for installing it. If the car won't be getting into the 11s then c clip eliminators are not needed. That rebuilt posi on ebay is a Governor Lock. I don't recommend using one of those in a performance car. They have a loty of small parts in them that break easily and cause it to quit working. They are fine in a stock Gm truck, which is what they came out of.

As for the 12 bolt, I can get you a new Moser for $2225. I know that's still high, but cheaper than $2400.

 

Ya, with my headers and true dual AND posi i might make it into the high 13's but idk. thanks for the advice, but i'm going to have to find a used eaton posi, i know auburn is crap, but i don't have the money coming in for a brand new eaton. i wish.

 

Finding a used Eaton Posi is going to be hard becasue GM didn't install them in any of the 7.5 rear ends.

 

So i've heard, i'm not in a huge hurry to get it at the moment, the headers and exhaust will take up the next week or so in time, and next paycheck is going to tires. After that i am tinting the windows and possibly repainting the trim so the cars all black, and blacking out the rims. after that though i was hoping to find some posi, what about a 4 gen posi unit??

 

i didnt do the swap myself i had a mechanic do it bought a full rear axel 4th gen with posi for 300 installed car only had about 40,000 on it when the guy took it out

 

Sure, but you'll need 28-spline axles.

JamesC

 

So the posi unit would fit in the 10 bolt? i can get the 28 spline axles... thirdgen axles will work right?

 

Yes. As long as the axles are 28, yes. You might wish to reread the link in post #2 where all this is covered.

JamesC

 

I did, just really quickly lol, thanks though.

 

This will help with a swap from a standard differential to a posi. http://www.nastyz28.com/forum/showth...t=install+posi This is for the 8.5 rear end, but the 7.5 is the same.