Are 10 bolts 8.5 30 spline?
 

I'm looking for a posi unit, and someone said they have one for a 10 bolt 8.5 30 spline they'd let me have for cheap. My truck has a stock 10 bolt in it, would this work for me?

Re: Are 10 bolts 8.5 30 spline?
 

some are 28 some are 30 I think depends on the year. i would get it and change out the axels to 30-spline axels. stronger imo. dont quote me tho lol

Re: Are 10 bolts 8.5 30 spline?
 

Any way to tell if you have 28 or 30?
My truck's an 86 that came stock with a 305. Probably 28 spline being my luck.

Re: Are 10 bolts 8.5 30 spline?
 

I believe the 30 spline started in 88 with the new body style

Re: Are 10 bolts 8.5 30 spline?
 

28 spline carried into the early part of the '89 production year then they switched to 30 spline.dont quote me tho lol

Re: Are 10 bolts 8.5 30 spline?
 

"
'88 and older 8.5" 10 Bolts including some early '89s have 28 spline axles. "

Re: Are 10 bolts 8.5 30 spline?
 

Thanks.

Re: Are 10 bolts 8.5 30 spline?
 

2WD=28 spline, except on the 88-98 trucks. 4WD were 30 spline and 6 lug, except the 10 bolt front, which is also a 28 spline.

Re: Are 10 bolts 8.5 30 spline?
 

remember suburbans and blazers has the same 10 bolts up till 1992

Re: Are 10 bolts 8.5 30 spline?
 

are 2wd suburbans what most look for when trying to find a posi unit or more desireable gear?