72 Nova posi question

Does anyone know for sure what kind of posi carrier would fit in my 72 Nova? I know it a 8.5" 10 bolt but some websites say it a 28 spline and some show it being a 30 spline axle. Any info would help me. even part number's,etc
Thanks Brandon:confused:

In my 8.5 i have a 3.08 and higher carier for the posi unit. Hope that helps

Rennskii

I dont have any part numbers for ya, i have a 28 spline axels as well.

If it's the stock/correct rear, it's a 10 Bolt 8.5" rear, with 28 spline count.

Eaton/Auburn/and all the rest make Posi units for this rear. Just make sure you get the correct spline count.

I'm using a stock GM S-Spring type unit out of late 70's/Early 80's camaro in my '72 Nova. If you plan to buy a used unit, be sure to factor in the cost of a rebuilt. I got my unit for $36, but put $150 into it for a clutch pack, shims, bearings, races, and a new S-spring.

I got mine out of a late 70's, 79 i think, Trans am. With rear discs setup. Got it for 400.... Needed total rebuild, new everything for the discs, cept mounting brackets, And to boot i had to trade the housing straight over for a 8.5 out of a 74 nova?? i think....been a while... But it was beacuse the wheelbase was two inches wide with the trans am rear. But there are many factors to consider. I had mine professionally done, Seals, the works and it came up to almost 2 grand for that damn thing. Wish i would have just bought a shortened 12 bolt for that much... Live and learn. And whats another 2 grand anyway? :beer: :o

Rennskii

Does anyone know for sure what kind of posi carrier would fit in my 72 Nova? I know it a 8.5" 10 bolt but some websites say it a 28 spline and some show it being a 30 spline axle. Any info would help me. even part number's,etc
Thanks Brandon:confused:

Assuming you Nova has the original rear. 28 spline 8.5. BTW 30 spline? thats a 89 and up truck carrier.
If you want to replace the axles @ the same time you replace the carrier. then you can upgrade to a 30 spline carrier and use 69 camaro 12 bolt axles, and Viola you have 30 spline.

The 30 spline carrier requires adapter bearings available from you supplier of choice and is a direct bolt in.

I know this cause I did it my self. My 72 has 69 Camaro 12 bolt axles because they are 30 spline and the Exact same length as my 10 bolt axles. so in a word 12 bolt axles are the exact same as 10 bolt axles except for the spline count.

Assuming you Nova has the original rear. 28 spline 8.5. BTW 30 spline? thats a 89 and up truck carrier.
If you want to replace the axles @ the same time you replace the carrier. then you can upgrade to a 30 spline carrier and use 69 camaro 12 bolt axles, and Viola you have 30 spline.

The 30 spline carrier requires adapter bearings available from you supplier of choice and is a direct bolt in.

I know this cause I did it my self. My 72 has 69 Camaro 12 bolt axles because they are 30 spline and the Exact same length as my 10 bolt axles. so in a word 12 bolt axles are the exact same as 10 bolt axles except for the spline count.

Very good info, thanks for sharing. :)

heres a pic

another pic

Thanks for the info guys. I'm going to buy one tomorrow from a 79 trans am.

Thanks for the info guys. I'm going to buy one tomorrow from a 79 trans am.

be sure it is @ least a 2:79 ratio..... higher and the 3;42 wont fit