I have a 95 yj with what I believe to be a Dana 35c. What weight lube do I use. I have been told by a mech that it should use 75/140, but Chiltons says 75w90. Do I have a limited slip? Do I need an additive? I'm lost
Thanks,
Greg
Dana 35c gear oil used
Dec 20, 2006
21 Replies
The synthetic 75w-140 will protect the gears from additional heat and stress such as operation off-road driving or when towing over the dino derived
80w-90.Both should have anti-foaming additives.
It sounds like you have bad or incompatible oil or a bad mix of oil. The manual for this vehicle, which I have, recommends Mopar Gear Oil (yeah, whatever), 75W90 API-GL5 or 80W140 for towing. I am pretty sure I have some kind of 80W90 in mine. They recommend a level one half inch below the fill hole. I recommend a synthetic if you live where it is real cold. I can't imagine why 75w140 vs 80w90 would cause foaming, unless your local oil change place found a real cheap supplier.
I think maybe it is time to call them, and ask nicely what the hell they did to your car.
Earle
There is a limited slip additive that is used for limited slip differentials only. They would know by the tag on the cover, or by the look of the differential carrier if they took the cover off, that it was limited slip. If you don't have limited slip, and they put this additive in, it wouldn't hurt anything. It's not supposed to anyway. The 75w140 won't hurt anything either. I am thinking that they used a real cheap oil, that has a tendency to foam.
The chances of getting a 95 YJ with limited slip from the factory are pretty low, but sometimes people have them put in after they buy the vehicle.
Maybe they used a different type of additive? I have no idea what that might be.
Earle
Are you sure you are seeing gear oil?
Are you sure the tube you are seeing is the high water vent?
Are you even seeing this mysterious drip's source?
You said you checked it and it wasn't over full.
Was it purple?
Has the level dropped? If leaking it 'must' drop the level in the diff.
Are you 'sure' you are seeing gear oil?
What does this stuff that is leaking out smell like?
WHY are you changing the fluid again?
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail >
Was the back of the tire wet? How about the rim?
Welcome to the DIY club!
Earle
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