Just wondering if anyone has any experiance with differential fluid. I got home from Auto Zone and noticed I had picked up a synthetic gear lubricant that had a "LS" on the bottle which made me worry I got the wrong kind. Anyone give me some input on this and tell me I'm just being over'ly worried and it I'll be okay using this on my Rubicon with 35's and 5.38's. About once a month I'll pull a 3200 lb camping trailer. I was told the weight is good but didn't notice the LS and cant recal if there was a non "LS" kind that would have suited my needs better. From mobile ones website product description it sounds like it will be fine.

http://www.mobil.com/USA-English/Lub...LS_75W-140.asp

This is what I got

 

The LS is limited slip. At the bottom of the Mobil page that you linked, there is a mention of limited slip. If you have the limited slip in your diffs, you should be fine. If you don't, I would go with the non LS version.

Just my $.02 - I'm sure that there is someone more knowledgeable out there who can give you a more "scientific" answer.

JD

 

you are fine, this from your owners manual
Axle Differential (Front) Mopart Gear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent.
Axle Differential (Rear) 198 RBI (Model 35) and 226 RBI (Model 44) - Mopart Gear & Axle Lubricant
(SAE 80W-90) (API GL-5) or equivalent. For trailer towing, use Mopart
Synthetic Gear & Axle Lubricant (SAE 75W-140) or equivalent. Models
equipped with Trac-Lok require an additive

Mobil 1 meets API GL-5

also I believe ALL synthetic gear oil has some LS additive

 

Awesome, thanks for that. I thought it would be fine but since I don't think I have a limited slip differential. (Its just the stock axles that comes on the Rubicons but I did upgrade from 4.1 to 5.38s which I wouldn't think would matter) But since the bottle said "LS" I thought I'd ask the experts from the forum. You guys rock! Thanks