Symptoms
Unknown history, a deep water crossing, or towing. You may hear whine or chatter in tight turns from the electronic LSD.
The fix, step by step
- Both axles take synthetic 75W-85 GL-5.
- AMSOIL lists the 215FD front at 2.3 pints and the 260RDU rear at 3 pints on Hurricane and 6.4 trucks (its 2022 5.7 entry shows 2.3 pints without ELSD and 2.7 with).
- Remove the fill plug first so you know you can refill, then drain, refit the drain plug and fill to the bottom of the fill hole.
- The owner's manual calls for friction-modified 75W-85 in the rear, whether it has the electronic LSD or a mechanical LSD.
- AMSOIL's lookups cite Mopar 75W-85 with modifier (P/N 68083381AA), but its entries disagree on which rear axle needs it, so check the part number with the dealer.
Tools & part numbers
- Fluid pump
- sockets or hex bits for the plugs
- drain pan
- torque wrench
Where to buy the parts
Gear oil, 2022 Wagoneer 5.7RockAuto ↗Amazon ↗
Mopar 68083381AA gear and axle lubricant with modifierAllMoparParts ↗Amazon ↗
Differential pinion seal, 2024 Wagoneer 3.0RockAuto ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Jeep Wagoneer & Grand Wagoneer (WS) parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.