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Thread: "96 Tahoe Rear Axle Confusion
10-19-2013, 04:15 PM #1
"96 Tahoe Rear Axle Confusion
So around Thanksgiving time I plan to do some work on my truck including replacing the rear diff fluid, but I keep finding conflicting information about the '96 G80 axle. On the GM dealer order catalog for Tahoe in 96 it specifically says the G80 is a locker, but on RPO decoders it says its a limited slip and even in the owners manual it lists it as one. So before replacing the fluid I want to try to figure out what is the preferred fluid for my rear and if anything else should be done to the rear at this time. I also will be replacing the factory cover with one that has a drain plug so fluid changes will be easier in the future.
I know that on the newer trucks the G80 is the locker, but in the 90's there seems to be a lot of conflicting information.
1996 Chevy Tahoe LT 5.7L V8 4X4 202,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.
Check out my other mods in My Garage: http://www.gmtruckclub.com/forum/sho...t-Tahoe-4-Door
10-19-2013, 07:08 PM #2
I believe the G80 is a limited slip for the gmt400s. I may be wrong though.
10-19-2013, 07:26 PM #3
That is my understanding, but I want to make sure because Limited slips use different fluid then lockers and my fluid options change. I think I'll post a screen shot of the GM doc I have.
10-19-2013, 07:29 PM #4
10-19-2013, 07:32 PM #5
10-19-2013, 08:14 PM #6
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Really? I've never heard this before. That would be fairly confusing if they changed from a limited slip to a locker and kept the same name.
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10-19-2013, 08:25 PM #7
10-19-2013, 08:43 PM #8
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- Grand Prairie, Texas
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Considering Eaton has been providing lockers for GM light duty trucks since 1973 its possible this truck has a locker, the only way to determine whats installed might be to crack open the differential if you no longer have the tag.
At one point many automotive mfgrs used the term "locker" mutually for a locker or an LSD.
In the late 90's when Land Rover and Toyota began offering selectable lockers mfgrs were forced to better define what exact type of differential they were installing.
10-19-2013, 09:08 PM #9
Guess that is the only way to tell. I was just hoping I would be able to buy the fluid before I opened the rear up. I tired to look around the casing to see if there were any other markings but the only one I found was the GM logo. I know AAM made the limited slips I was hoping to see if they had their letters imprinted. I think there was an indiscernible serial number but I couldn't see it and any pic i tried to take came out blurry or too bright.