What Gear Oil
02-20-2009, 04:40 PM
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What Gear Oil
I have an 07 sahara with factory 4.10s and 35's. Im not sure what diff oil i need. The jeep sealership advised me to go with 75w 140 front and back and sold me a limmited slip additive. I went to the parts store to buy the oil and all the 75w 140 said it had the additive for Limmited slip in it. So What do i really need to be getting?? Also is all 75w 140 synthetic?
02-20-2009, 04:52 PM
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The additive for limited slip on Chrysler/Jeep is specific and not included in the oils at other stores - pay the small price, or pay the large price when they don't honor your warranty (they could do an oil analysis if they wanted).
Edit - I should check the owner manual this info comes from previous jeeps I've owned.
Edit - I should check the owner manual this info comes from previous jeeps I've owned.
Last edited by foxcasper; 02-20-2009 at 05:15 PM.
02-20-2009, 05:03 PM
#3
JK Jedi Master
75W-140 recommended for rear axle only. It is the one that needs it for towing.
From the Owner's Manual:
Axle Differential (Front) Mopar Gear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent.
Axle Differential (Rear) 198 RBI (Model 35) and 226 RBI (Model 44) - Mopar Gear & Axle Lubricant
(SAE 80W-90) (API GL-5) or equivalent. For trailer towing, use Mopar
Synthetic Gear & Axle Lubricant (SAE 75W-140) or equivalent. Models
equipped with Trac-Lok require an additive.
Nothing here says it has to be MOPAR oil or additive.
Look at a bottle of Mobil 1 synthetic 75W-140. I believe it states it has the limited slip additive.
From the Owner's Manual:
Axle Differential (Front) Mopar Gear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent.
Axle Differential (Rear) 198 RBI (Model 35) and 226 RBI (Model 44) - Mopar Gear & Axle Lubricant
(SAE 80W-90) (API GL-5) or equivalent. For trailer towing, use Mopar
Synthetic Gear & Axle Lubricant (SAE 75W-140) or equivalent. Models
equipped with Trac-Lok require an additive.
Nothing here says it has to be MOPAR oil or additive.
Look at a bottle of Mobil 1 synthetic 75W-140. I believe it states it has the limited slip additive.
Last edited by ronjenx; 02-20-2009 at 06:34 PM.
02-20-2009, 07:30 PM
#4
JK Jedi Master
The Mobil 1 75W-140 says it has LS friction modifiers. It also says you can add the OEM stuff if you want to.
But, like I quoted, the manual doesn't even say a MOPAR additive; it just says "an additive". Wouldn't hurt to add whatever stuff the dealer has.
But, like I quoted, the manual doesn't even say a MOPAR additive; it just says "an additive". Wouldn't hurt to add whatever stuff the dealer has.
02-21-2009, 08:10 AM
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02-21-2009, 08:26 AM
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i thought only the dana 44's had the limited slip in them so wouldnt you only need the additive for the rear?
im kinda lost and am getting close to changing my diff oil
im kinda lost and am getting close to changing my diff oil
02-21-2009, 09:33 AM
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IM pretty sue I have LS diff. I had the dealership pull up my vin number and they said i needed the friction mod and 75w 140 in both front and rear(Friction mod only in rear) sence i have heaver tires.