Differential Fluid

[JDLouisville]

Someone above asked about fluid volume in F&R Diffs.

JL Wranger Differential capacity:
186 FBI - Front Axle 1.82 Pints 80w-90
210 FBI - Front Axle 2.18 Pints
200 RBI - Rear Axle 2.43 Pints 80w-90, if towing 75w-140
220 RBI - Rear Axle w/ EDL 3.06 Pints
220 RBI - Rear Axle w/ T/L 3.02 Pints

186 FBI (Model 30) - Front Axle
MOPAR Gear & Axle Lubricant (SAE 80W-90) (API GL-5)
1.82 Pints/0.86 Liters

210 FBI (Model 44) - Front Axle
MOPAR Gear & Axle Lubricant (SAE 80W-90) (API GL-5)
2.18 Pints/1.03 Liters

200 RBI (Model 44) - Rear Axle
MOPAR Gear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent.
For trailer towing, use MOPAR Synthetic Gear & Axle Lubricant (SAE 75W-140).
Models equipped with Trac-Lok require an additive.
2.43 Pints/1.15 Liters

220 RBI (Model 44) Rear Axle – EDL
MOPAR Gear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent.
For trailer towing, use MOPAR Synthetic Gear & Axle Lubricant (SAE 75W-140).
Models equipped with Trac-Lok require an additive.
3.06 Pints/1.45 Liters

220 RBI (Model 44) Rear Axle – T/L
MOPAR Gear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent.
For trailer towing, use MOPAR Synthetic Gear & Axle Lubricant (SAE 75W-140).
Models equipped with Trac-Lok require an additive.
3.02 Pints/1.43 Liters

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[BLACKMOAB]

Someone above asked about fluid volume in F&R Diffs.

JL Wranger Differential capacity:
186 FBI - Front Axle 1.82 Pints 80w-90
210 FBI - Front Axle 2.18 Pints
200 RBI - Rear Axle 2.43 Pints 80w-90, if towing 75w-140
220 RBI - Rear Axle w/ EDL 3.06 Pints
220 RBI - Rear Axle w/ T/L 3.02 Pints

186 FBI (Model 30) - Front Axle
MOPAR Gear & Axle Lubricant (SAE 80W-90) (API GL-5)
1.82 Pints/0.86 Liters

210 FBI (Model 44) - Front Axle
MOPAR Gear & Axle Lubricant (SAE 80W-90) (API GL-5)
2.18 Pints/1.03 Liters

200 RBI (Model 44) - Rear Axle
MOPAR Gear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent.
For trailer towing, use MOPAR Synthetic Gear & Axle Lubricant (SAE 75W-140).
Models equipped with Trac-Lok require an additive.
2.43 Pints/1.15 Liters

220 RBI (Model 44) Rear Axle – EDL
MOPAR Gear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent.
For trailer towing, use MOPAR Synthetic Gear & Axle Lubricant (SAE 75W-140).
Models equipped with Trac-Lok require an additive.
3.06 Pints/1.45 Liters

220 RBI (Model 44) Rear Axle – T/L
MOPAR Gear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent.
For trailer towing, use MOPAR Synthetic Gear & Axle Lubricant (SAE 75W-140).
Models equipped with Trac-Lok require an additive.
3.02 Pints/1.43 Liters

How do you determine which model of differentials your JLU has? It doesn't indicate which you have on the window sticker. Mine just says Trac Lok differential rear axle.

 

[INCRHULK]

How do you determine which model of differentials your JLU has? It doesn't indicate which you have on the window sticker. Mine just says Trac Lok differential rear axle.

Trac Lok is the rear 220 with LSD. 80-90 and friction additive. EDIT: unless you have the tow package. 75w-140 and additive.

 

[Rufus]

I always use VALVOLINE 75W-140 SYNTHETIC for all my jeep differentials--

It was recommended for my '08 JKUR and that's what i use in my JL-

W.E.

JIMBO

If you don’t add an FM with the Valvoline have you noticed any chattering?

 

[JIMBOX]

If you don’t add an FM with the Valvoline have you noticed any chattering?

Nope, I've used the 75w-140 for years and It's labelled LIMITED SLIP--

Works great, very quiet !
Good luck

JIMBO

 

[Rufus]

Nope, I've used the 75w-140 for years and It's labelled LIMITED SLIP--

Works great, very quiet !
Good luck

JIMBO

Thanks! I ordered 2L!

 

[PyrPatriot]

So not wanting to spend $150 to replace differential fluid for both axles (need slightly 5.25pts, so need to buy 3qts to get the needed 2.625pts), what SAE 75W85 API GL-5 Gear and Axle Oil/Lubricant is good?

I was looking at the Red Line 50105 75W85 GL-5 Gear Oil, $60 for 1gal, but the label states it is for hypoid limited slip diffs, and my Sport has open diffs.

Will that work or is there an alternative I should use?

Here is the list of fluids from my dealership's part department, provided to me when I gave them my VIN.

The Mopar stuff is over $50/qt. Even online after shipping 3qts is about $120. I am ok with $60-70 per gal for alternative stuff, the concern is the "for hypoid limited slip differentials" on the Red Line bottle, which on their website expands to "Contains additional friction modifiers for suitability with clutch-type limited slip differentials - for most LSDs, no additional friction modifiers are required " My JT has open diffs, don't need the friction modifier, I am concerned this one having the friction addative would harm something.

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