Posi questions

[88leadsled]

Now that I've been to the track and driven the truck for a while I realize a posi or locker is definitly necessary. I was wondering if the stock posi is decent and maybe I could save some money by grabbing a posi rear out of a junkyard. Or is the stock posi on obs 1-tons any good?

If I don't go that route what is the best unit to get?

[L82gofast]

The stock G80 is no good for racing. It unlocks to a one wheel peel over 20mph. Eaton or Auburn is what you need. I have had no problems with my Auburn and you can definetly tell the differance in grip.

[88leadsled]

I've heard the G80 is no good for racing but just wasn't sure if it was the same thing that the general used back in 88 on the obs 1 ton trucks or if it is more of a true posi?

[L82gofast]

You are right. The G80 showed up in the late 90's I'm pretty sure. I have a '93 blazer that has the true clutch posi in it. So I bet the 88 is ok as long as the clutches still grip.
I think Eaton came up with the G80 for GM for cost reduction....

[rckrzy1]

Originally posted by 88leadsled@Apr 30 2004, 12:07 PM
I've heard the G80 is no good for racing but just wasn't sure if it was the same thing that the general used back in 88 on the obs 1 ton trucks or if it is more of a true posi?

all G80's are not the same. the g80 option in my F body is a
true limited slip posi with clutchs and will spin street tires a
good 330' if I wanted too. And the new G80 locker is made
by Eaton.

[onyx]

i would say go aftermarket on a posi and get OEM gears... thats the way i did it, and no problems here...

but as with any install of that sort, having a reputable installer is most important...