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2018 Jeep Wrangler
2018 Wrangler JL automatic fluid is Mopar ZF 8&9 Speed ATF. The manual transmission and transfer case use ATF+4. Axle oil is 75W-85 GL-5.
Difficulty, time, and cost are estimates when this guide gives them. Torque is a cited figure, or it is left off.
Main source: 2018 Jeep Wrangler JL Owner's Manual, publication 18JL-126-AC, fluids and lubricants (opens in a new tab), FCA US LLC, published 2018-01-01, read 2026-10-15.
Numbers on this page come from the cited source. Match the engine before you use a capacity or a torque. Do not work under a vehicle held only by a jack.
The fluid named for that unit
The chassis table names the fluids. It does not print a fill quantity or a drain procedure.
| Item | Figure | Where it comes from |
|---|---|---|
| Automatic transmission, if equipped | Mopar ZF 8&9 Speed ATF or equivalent. No capacity is printed. | Fluids and lubricants, chassis |
| Manual transmission, if equipped | Mopar ATF+4. No capacity is printed. | Fluids and lubricants, chassis |
| Transfer case | Mopar ATF+4. No capacity is printed. | Fluids and lubricants, chassis |
| Front axle | Mopar Gear and Axle Lubricant SAE 75W-85, API GL-5. No capacity is printed. | Axle differential, front |
| Rear axle | Mopar Gear and Axle Lubricant SAE 75W-85, API GL-5. Trac-Lok limited-slip models require a friction modifier. No amount is printed. | Axle differential, rear |
| Power steering reservoir | Mopar Electric Steering Pump Fluid. This is not ATF. | Power steering reservoir |
The automatic-transmission row says to use only Mopar ZF 8&9 Speed ATF or equivalent. It does not print a quart capacity.
Both of those rows recommend Mopar ATF+4. Neither row prints a capacity.
Front and rear axle lubricant is Mopar Gear and Axle Lubricant SAE 75W-85, API GL-5. Trac-Lok rear axles also require a friction modifier additive.
No fill quantities are printed for the transmission, transfer case, or axles, so none are added. Electric steering pump fluid stays on its own row.
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Tool
The fluid named for that unit
The chassis table names the fluids. It does not print a fill quantity or a drain procedure.
2018 Wrangler JL owner's manual (opens in a new tab)Search Amazon.com (affiliate link) (opens in a new tab)
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These guides cover the same kind of work. Their numbers belong to those vehicles, not to this one.