Determining correct aftermarket differential

[SILV]

Hey guys, I'm looking at getting a set of gears and a limited slip differential for my 82 c10. It has a 10 bolt rear end which I think is the 8.5". How many axle splines did these trucks have? Anyway to determine this without pulling axles. I'm seeing 28 & 30 spline applications.

We did swap the rear ends like 15 years ago. So I have no idea what exaxtly it came out of. If it boils down to it, I will pull the axles if I have to.

Anyone have any ideas?

[Gregski]

unless I am reading that chart wrong LMC Truck says 10 bolt rear had 28 splines, and assuming C10 being a two wheel drive so x 31 - 3/8" OL

http://www.lmctruck.com/icatalog/cc/full.aspx?Page=161

but a lot can change on a truck in 34 years, as you said yourself

just trying to help

[nonstop]

Hate to say it.....pull an axle. It's the only way to be sure, especially since it's not original to the truck.

[andrewmp6]

Yeah i would pull the axles and see how big the ring gear is in it to know im ordering the right parts.Worse case it cost you gear oil.