GM 14-bolt FF Rear End with 149k miles
Hi to all, Our TV is a GMT400 1997 GMC K2500 7.4L Burb with 149k miles. It is 8-lug, 3.73, GVWR 8,600, with GAWR RR of 6,000 lbs for the full floater rear axle. We believe the rear end also has 149...
Forum Discussion
MartyW wrote:
Ok, now I'm still confused.
We have a 2000 half ton Chevy Astro with G80 (semi floater) and we had rear end clutch chatter in that vehicle because the rear diff fluid was changed without the additive. I was told by my Chevy tech friend that the Astro G80 needed the additive and he then added it and over the past couple years the chatter has been getting better with the additive.
So if the 3/4 ton full floater G80 has clutches, why wouldn't we need the additive?
Thanks
I had a '97 Astro with the G 80 locker. This locker is made by Eaton. Years ago, I recall the Service Manager telling me that the G 80 axle is a locking system used in the GM truck line and is not the posi traction, which was a limited slip system used in the older GM car line.
The Posi traction, limited slip required additive. But the GM G 80, Eaton locker did not use, nor was it recommended by the service manager to use additive.
