Auburn 30 spline to 28

Post Reply
Newbie Poster
Posts: 3
Joined: Fri Feb 17, 2012 10:15 am

Auburn 30 spline to 28

Post by LSJM1 » Sun Feb 19, 2012 8:27 am

On a 8.5 Auburn posi unit can you change the side gears from 30 to 28 spline
Will the side/pinion gears from a 28 spline auburn 7.5/7.625 work in the 8.5 unit I found a 98 firebird in the yard with an auburn
going to upgrade my axles down the road to 30 spline just can't afford it right now trying to get it rolling as cheap as possible

User avatar
Average Poster
Posts: 847
Joined: Tue Nov 13, 2007 7:56 pm

Re: Auburn 30 spline to 28

Post by monzaz » Mon Feb 20, 2012 4:02 pm

No , No and No.

Sorry all things are not going to work.

7.5/7.625 to 8.5 will never work

After market 8.5 to 8.5 30 spliner Auburn could work BUT you need to be sure the hub is drilled big enough to get a 30 spline axle through the carrier hub stub.

GM auburn 26 -28 spline will not work. Period. @ totally different designed spider gear set-ups.

Seems as if it would be an easy deal...But not so. At least you asked before wasting time and money. Jim
J D Race

Post Reply