What gear oil do you guys use in your Dana 30/Dana 35? Conventional or synthetic? From what I'm reading it's just over 1 quart for the Dana 30 and 2 quarts for the Dana 35. 80/90 is the suggested weight. I'm changing the gear fluids on a 1996 Jeep Grand Cherokee Laredo. Did any of them come with a trac-lok? Just wondering if I needed to pick up some additive for it. Thanks!
Differential gear oil change.
- Thread starter kofat
- Start date
77GreenMachine
Phillip Talton
- Joined
- Mar 30, 2010
- Location
- Trinity, NC
It should be a typical open diff with no additive needed. I just throw whatever brand orielly has on the shelf in.
untchabl
I like rocks
- Joined
- Mar 30, 2009
- Location
- Bear Creek, NC 27207
Lucas non-synthetic 80/90 was what I ran in my Jeeps.
rodney eppes
Well-Known Member
- Joined
- Feb 3, 2010
- Location
- Mt.Holly NC 28120
It's a matter of choice. I run 75/85 [depending on brand] - 140, synthetic. For years, my Jeep has been parked on a concrete floor. Just the difference in trying to push it with standard 90W vs. synthetic, is convincing for me. Synthetic will give you more protection if you get water or moisture pollution, in the housing, & hopefully a little more if you spring a leak & run low. If you decide to splurge for syn, might as well go up to the 140 weight. I think it's still the same or near same cost, even if the gears get hot enough to make the 140. I busted open a diff cover on night, in a river crossing, without knowing it. Drove 15 - 20 miles back to the Hotel. Saw it the next morning. JB Weld & 2 qt of 90, got me home & drove it for two more weeks, before the bearing started making noise. The ring & pinion, were blued, from the heat, but were not making noise. I feel like the synthetic, got me back home & then some. Just my opinion.
Jeff B
Thanos was right
- Joined
- Dec 23, 2006
- Location
- Lincolnton N.C.
ECGS Gear Oil Recommendation
ECGS recommends Dino (Non-Synthetic) 85w140 Lucas oil with a Ford or Dana limited slip additive for clutch style posi's. The gear oil question is an age old debate that comes down to opinion. We base our opinion on differentials we have seen. Scientifically it has been proven that when measuring...
eastcoastgearsupply.com
ckruzer
Infidel
- Joined
- Jul 2, 2015
- Location
- asheville nc