Yukon positraction for GM 10-bolt ?

[COPO_Anders]

Hi,I have a Yukon 10-bolt positraction made for 30 spline axles. The measuring I did in the pic showed 5 inches, but how can I tell for sure what it fits ?
I thought I could use it in a 10-bolt rearend from the 60´s but they are 28 bolt, aren´t they ?

[PxTx]

The 8.5" Ten bolt is the most popular and strongest. It came with 28 spline axles until around 1988- then it had 30 spline. It continued to evolve to somewhere around 2000 I think with an 8.6 ring gear.

The 8.2 Ten bolt from the 1960's stopped around 1971 or so. It has a much weaker pinion than the 8.5 rears. I never tried to put the 8.5 in a 8.2 housing. It wouldn't be a bolt in, but I'm not sure it couldn't be made to work by a determined guy. The axles you could upgrade to new or used 12 bolt axles.

[PxTx]

http://www.camaros.net/forums/27-tra...2-housing.html

Seems like some have done it.

[COPO_Anders]

Thanks Paul,
even though it probably could be used in a early 10-bolt axle, I guess the best (strongest) thing would be to use a 8.5 housing and 12-bolt 30 spline axles. Right ?

[earntaz]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: COPO_Anders</div><div class="ubbcode-body">
Thanks Paul,
even though it probably could be used in a early 10-bolt axle, I guess the best (strongest) thing would be to use a 8.5 housing and 12-bolt 30 spline axles. Right ?</div></div>

Thats what I did on the 10 bolt 8.5 in my 71 Nova. Used a truck 8.6 w/3:42 gear, 12 bolt 30 spline axles and installed the correct bearings to make it work ... TAZ

[PxTx]

I sheared the pinion on an 8.2 once. When you compare the pinion sizes, the 8.5 makes so much more sense- it's like a 12 bolt!

Yes, if you can get a 8.5 housing and some good aftermarket 30 spline axles, I would say it is a wise upgrade.