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Thread: rear end questions
08-10-2012, 08:20 AM #1
- Join Date
- Aug 2012
rear end questions
hows it goin guys i'm new to this fourm.
so i have an 87 GMC cabilero and i've been lookin for a posi unit so i can actually get somewhat of a good launch at the drag strip.
yesterday i came across a chevy 1500 4.3 vortec pickup and the salvage yard i'mnot sure of the year cause the doors were gone but i'm asuming that it was a 96 or newer. but anyway i spun the pasinger side tire and clunk the posi ingaged. but thats not the issue. I have no idea wether or not it has an 8.5 in ring gear. it's a 10 bolt and i stupedly forgot to look at the id tag.
and how do i tell if it has 28 splines of 30 spline axles?
also my car has a fore link suspension system that the upper control arms connecto to the top of the pumpkin case so i would need to weld the upper control arm mounts on. is the pumpkin case on that diff cast iron? and if so how could i attach the upper control arms so they wont come flying off on a hard launch?
p.s. i know this rear end is too wide, i've shortened axle widths before but i've always worked on leaf spring trucks never anything with a fore link
thanks for any info you can give me
08-14-2012, 01:36 PM #2
You're barking up the wrong tree. GM used the Eaton G80 Gov-Loc in 1973 and newer trucks. This diff is not a good choice for a vehicle used on the dragstrip. It has many small parts inside, and they have been known to chuck those small parts with normal street use. On a strip it won't last long. You need a clutch type limited slip like the Eaton Posi or the Auburn
97 Chevrolet Suburban K1500 5.7L
78 GMC High Sierra K1500
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