rear end gear ratio 82 pick up

[ed dillard]

i have a 82 gm pick u p6.2 diesel with turbo 400 trans what is the factory rear end gear ratio??

[catmandoo]

jack up one rear wheel,mark the tire then grab the driveshaft and start turning,count turns til tire gets back around to where you started,(example)if it takes just over 4 turns its 4:10,if it's about 3 3/4 turns it's 3:73,if it's just under 3 1/2 turns it's 3:42,if just a hair over 3 turns it's 3:08,and if by chance the wheel doesn't spin,it's a posi rear end then jack both wheels off the ground and turn the shaft and count revolutions.

[catmandoo]

sorry about that you have to go 2 revolutions of the tire on the non posi units

[BobND]

Look on the build sheet sticker for the axle code (assuming it's as-original).

Codes will likely be GT* or GU*.

http://www.drivetrain.com/GMtrkratio_posidata.html