Hey guys. I currently have an open diff 3.42. With the new engine a month or so away, I'm wanting to get a posi into the truck to get the power to the road. I know a guy with a whole rearend with 3.73 gears and a factory G80 posi from a Tahoe that would swap right into my Yukon.

What is everyone's experience with the G80 regarding smoothness of operation, noise, reliability and longevity?

 

With what I see planned in your sig, I would recomend you getting something better like an Eaton or Auburn Pro. My G80 hung in there as long as it could but it just couldnt hold the power. I think they are fine for a stock or mildly moded truck but not a performance carrier by any means.

btw.. this is what happens to a G80 when you spray a 100 shot with a yank 3000, et streets and a sticky track...


More carnage HERE

 

D'oh.


I agree, if your going to swap, go with the Eaton. Spend the extra now, and you wont have to spend more in the future.

 

When you say 'Eaton', do you mean the E-Locker? Because I know the G80 is made by Eaton as well...

 

I got mine recently off ebay for $300

You want 8.5 10 bolt 30 spline (at least thats what I needed, Yukon should be the same?)

http://search.ebay.com/eaton-posi-8-...nQ20posiQ208.5

 

No, we normally just say Eaton when we are refering to thier posi unit. Posi's are much better for performance street applications than lockers.

 

Is the posi unit always locked? I mean, when you make a slow, sharp U-turn with a posi unit, do you hear tires squealing in the rear?

 

That's exactly what I needed to know! Appreciate the sharing of experience...

 

No, the posi is NOT always locked. It only locks when you start to spin. In the rain you have to be careful, because your *** will slide smooth around on ya.

 

Demon.. you are a little confused on how a posi works. What you described is a mechanical locker, just like the G80 unit. A posi uses clutches/springs and is torque sensitive. When it senses over a certian amount of torque, it will engage the clutches to spin both wheels. This is in cases such as launches or high throttle instances. Otherwise it operates normally like and open differential.