90halfton
I'm Awesome
Why is it every time there's a good thread with good info from experienced people some c### sucker has to come out and say some c### sucker **** that is in no way helpful.
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Wow, you sure are losing your mind over my post. Relax buddy. You made a lot of assumptions that have nothing to do with what I said..WTF do you think a GM dealer parts counter is going to do? They're going to look up your vehicle, by VIN, and give you the GM recommended gear oil for the specific rear end installed in your vehicle.
As for synthetic, what are you, one of those "all oil is the same" Luddites? Or did you just not know that synthetics weren't in wide use other than in the Corvette two decades ago when that truck was produced? Just because it wasn't factory then doesn't mean you shouldn't or can't use it. They didn't sell the trucks with premium tires either, do you tell people that putting better tires on their truck is stupid? Or should they only use all season Uniroyals made in 1999?
The fact is that synthetic gear oil is proven better in hot, cold, towing, and performance conditions. Period. And considering how seldom you actually have to change it, it's stupid not to upgrade to it.
WOW, someone's panties are in a bunch... hopefully your just having a bad day... please reread the post you replied to. You both are saying the same thing. BUT, you are saying it like you are the end decision here..WTF do you think a GM dealer parts counter is going to do? They're going to look up your vehicle, by VIN, and give you the GM recommended gear oil for the specific rear end installed in your vehicle.
As for synthetic, what are you, one of those "all oil is the same" Luddites? Or did you just not know that synthetics weren't in wide use other than in the Corvette two decades ago when that truck was produced? Just because it wasn't factory then doesn't mean you shouldn't or can't use it. They didn't sell the trucks with premium tires either, do you tell people that putting better tires on their truck is stupid? Or should they only use all season Uniroyals made in 1999?
The fact is that synthetic gear oil is proven better in hot, cold, towing, and performance conditions. Period. And considering how seldom you actually have to change it, it's stupid not to upgrade to it.
So to recap,
#1 Skin a cat
#2 Kick a dog
#3 Replace diff fluid with GL-5 80w-90.
Approx how much does the diff take?
Not sure if I can ship AC Delco oil over here...
(That 11.5" being the Dana 80 in the 3500HD which takes the synth 75w140 as I mentioned earlier.)Looks as though 3 quarts is what you should get
For the Rear Differential Capacity.....
Rear Drive Axle (8.6") 2.03 liters (2.15 quarts)
Rear Drive Axle (9.5") 2.60 liters (2.75 quarts)
Rear Drive Axle (9.75") 2.84 liters (3.00 quarts)
Rear Drive Axle (10.5") 2.60 liters (2.75 quarts)
Rear Drive Axle (11.5") 3.00 liters (3.17 quarts)