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Old 04-02-2013, 09:00 AM   #1
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Differential Fluid Suggestions

1997 Sport w/ Manual Transmission - Dana 30 (Front) Dana 35 (Rear)

Never changed the differential fluid before but looks to be a pretty simple process via youtube searches. Also planning on putting new covers on since I gotta take the old ones off.

What differential fluid should I use? Brand? Weight?

Thanks

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Old 04-02-2013, 09:09 AM   #2
Knows a couple things...

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Any GL-5 gear lube will be fine inside your axles. If your Dana 35 has a Tracloc limited slip differential inside, just make sure the gear lube you use includes words on the back label like "Compatible with limited slip differentials" which means it has the additive required by a Tracloc.

The exact viscosity is not as important in an axle as it is in the engine. A 75W-90 is a good choice, so is 70W-80 or 80W-90. If you tow, use a heavier viscosity like 80W-120, 85W-140, etc.

I doubt there is a brand of gear lube I wouldn't use but I normally use Valvoline, Castrol, or Torco. Personally, I prefer a conventional gear lube in the axles though for most of us, a synthetic is ok too.

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Old 04-02-2013, 09:49 AM   #3
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Awesome, thanks for the info Jerry
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Old 04-02-2013, 11:33 AM   #4
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Also here is a good write-up:

Jeep Axle Differential Fluid Change Service

I did mine a couple weeks ago and used the Valvoline 80W-90.


I have the D44 with limited slip. I also used a pump that makes it much easier to refill the axle:
Powerbuilt Oil Fluid Pump | Product Details | Pep Boys
If I tried to use a funnel in that small space I would probably have more oil in the driveway than in the axle.
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Old 04-02-2013, 12:05 PM   #5
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Awesome, dunno how I missed that write up. I check 4x4xplor before I do anything usually, lol.

Gottcha on the bottle pump. Plan to pick one up when I get the fluid. Thanks for the help gents.
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