Revolution Gear & Axle 2018+ Jeep JL Rubicon/JT Dana 44 220mm/210mm 4.56 Ratio 2-Cut Gear Package
If you put 35s or 37s on a 2018-up Jeep Wrangler JL Rubicon or a Gladiator JT and the truck now hunts between gears on the highway, feels lazy pulling away and drops out of seventh and eighth gear on every grade, the axle ratio is the problem. This Revolution Gear & Axle package (part number REV-JL-220/210-456DC) re-gears both Dana 44 axles to 4.56 in one order: a front and rear ring and pinion set plus a master install kit for each axle.
The JL Rubicon and the Gladiator use two different Dana 44 housings. The rear is the 220 mm axle and the front is the 210 mm reverse-rotation axle, and Revolution lists a 28-spline pinion for both. The ring and pinion is the final reduction between the driveshaft and the axle shafts. With the factory ratio and much taller tires, the engine turns fewer RPM for a given road speed, so the eight-speed automatic has to downshift to find power. Going to a numerically higher 4.56 ratio puts the engine back in its torque range and lets the transmission hold its top gears again.
These gears are face hobbed, which Revolution calls 2-cut. You can spot that style by the tooth height, which stays the same from heel to toe. Revolution states this cutting method, followed by lapping, runs quieter and carries more load than traditional face-milled gears, and the sets are made from 8620 steel.
Make sure the noise or performance loss is really the axles and not the transmission. Our 8HP gear ratio and specs guide explains how the eight-speed's ratios interact with final drive, which helps you work out what your current setup is doing at highway speed. Revolution's ratio tool divides ring gear teeth by pinion teeth, so if the axle tag is missing you can count teeth with the cover off. A whine that changes on coast versus drive, and grows with road speed rather than engine speed, points at the ring and pinion.
This listing is for 2018-up Wrangler JL Rubicon and Gladiator JT with the Dana 44 front (210 mm) and Dana 44 rear (220 mm). Non-Rubicon JL models use a different front axle, so they need a different package such as the JL non-Rubicon Dana 44 rear 4.56 package. Both axles must end up on the same ratio. Before ordering, confirm the axle tag or send us your year and VIN and we will check it. You can browse other axle kits in our rebuild kits category.
Gear setup is precision work. Pinion depth, pinion bearing preload, backlash and carrier preload all have to be set and checked with marking compound, so this is a job for an experienced differential installer. With both axles apart, it is a good time to inspect seals and shafts; the JL front intermediate axle shaft kit is worth having on hand if the front shaft seal is weeping, and a nodular iron rear cover protects the new gears on the trail.
Revolution's break-in procedure calls for 80W-90 or 85W-140 non-synthetic GL5 gear oil, several 15 to 20 mile cycles with cool-downs, staying under 60 mph for the first 100 miles, no off-roading or towing before 500 miles, and a gear oil change at 500 miles. After the swap, update the vehicle's tire size and axle ratio settings with a suitable programmer so the speedometer and shift schedule match the new gearing.
| Brand | Revolution Gear & Axle |
| Part number | REV-JL-220/210-456DC |
| Fits | Revolution Gear & Axle 2018+ Jeep JL Rubicon/JT Dana 44 220mm/210mm 4.56 Ratio 2-Cut Gear Package |
| Vehicle fitment | Jeep Jl Rubicon/Jt (2018) |
| Type | Differential Install Kits |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. Non-Rubicon JLs use a different front axle, so this front-and-rear Dana 44 package will not match. Use a package built for the non-Rubicon axles and confirm with your axle tag or VIN.
A 4.56 front ring and pinion for the Dana 44 210 mm axle, a 4.56 rear ring and pinion for the Dana 44 220 mm axle, and a master install kit for each axle with bearings and the parts needed to set up the gears.
Taller tires lower engine RPM at a given speed, so the eight-speed downshifts to make power. Re-gearing to 4.56 brings the RPM back up so the transmission can hold its top gears.
Revolution recommends 80W-90 or 85W-140 non-synthetic GL5 gear oil from a name brand, then a gear oil change at 500 miles to flush out break-in material.
Yes. Set the new tire size and axle ratio in the vehicle with a programmer so speedometer readings and shift points are correct.
