Eaton Detroit Truetrac Differential Dana 44 M210 / M220 32 Spline
If your 2018-up Jeep Wrangler JL or 2020-up Gladiator JT has the Dana 44 axles and you are tired of one tire spinning on wet rock, sand or a snowy driveway, the Eaton Detroit Truetrac 917A736 is the bolt-in gear-type limited slip built for those axles. It is cataloged for the Dana 44 M210 (210 mm ring gear, front) and M220 (220 mm ring gear, rear) with 32-spline, 1.41 inch axle shafts, and it covers every ring gear ratio, so one part number works whether you kept the factory gears or regeared for bigger tires.
The Truetrac replaces the open or factory locking carrier with a steel case holding helical side gears and pinions in machined pockets. Under normal driving it behaves like an open differential, so it turns quietly in parking lots and does not fight the steering on the front axle. When one tire loses grip, the helical gears load against the case and send more torque to the tire that still has traction. There are no clutch plates to wear and no air or electric actuator to fail, and it works the same in forward and reverse. The tradeoff is that a tire hanging completely in the air carries almost no load, so the Truetrac biases very little torque in that moment; a light touch on the brake pedal brings it back.
The JL and JT were built with several axle combinations, so first prove you have the Dana 44 and not the Dana 30 (M186) front or Dana 35 (M200) rear. Read the axle tag or the gear code on the window sticker, and measure the ring gear if the cover is off. If your Rubicon locker is the reason you are shopping, read our JL axle locker actuator guide first; a failed JL locker actuator is a much cheaper fix if you want to keep a selectable locker. If you want selectable lockup instead of automatic bias, the Eaton ELocker for the JL/JT Dana 44 is the alternative. Our Detroit Locker vs Truetrac comparison explains how each one drives.
Eaton's selector lists 917A736 for the 2018-2021 Wrangler JL rear Dana 44 M220 and the 2020-2021 Gladiator JT rear M220 and front M210; Revolution Gear catalogs the same part for 2018-2025 Wrangler, 2020-2025 Gladiator and 2021-2024 Ford Bronco. Eaton adds two catalog notes worth reading carefully. Broncos built with factory 3.73 gears use an open differential with the ring gear welded on, so those trucks need a new M220 ring and pinion to complete the swap. A JL or JT front installation requires an aftermarket front axle disconnect (FAD) removal or elimination kit. Spline count must be 32; the 35-spline M220 unit is a different part number. Match the axle model and spline count, or send us your year and VIN and we will confirm it. You can also browse our axle and differential hard parts.
Swapping a carrier means pulling the axle shafts, removing the carrier, pressing the bearings off and moving the ring gear to the Truetrac with new ring gear bolts and thread locker. Use new carrier bearings rather than reusing pressed-off ones; the Revolution JL/JT Dana 44 rear master install kit and the matching front kit carry the bearings, shims and seals. Re-check backlash after the swap: Yukon's setup chart lists 0.006-0.011 inch for a five-cut gear set on both the D44 JL 210 mm front and 220 mm rear, and 0.004-0.007 inch for a two-cut rear set. Fill with a quality GL-5 gear oil and do not add friction modifier, because the Truetrac has no clutches. If you are regearing at the same time, this is the moment to do it, since the ring gear is already off.
| Brand | Eaton |
| Part number | 917A736 |
| Fits | Eaton Detroit Truetrac Differential Dana 44 M210 / M220 32 Spline |
| Type | Differentials |
| 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. 917A736 is for the Dana 44 M220 rear and M210 front only. The JL Dana 35 (M200) rear uses a smaller 29-spline carrier, so it needs a different unit.
Yes, Eaton lists the M210 front, and a Truetrac is a common front choice because it does not lock solid and fight the steering. Eaton notes that JL and JT front installs need an aftermarket front axle disconnect elimination kit.
Not by itself. Eaton says factory 3.73 Broncos use a welded ring gear and open differential, so you also need a replacement M220 ring and pinion to complete the installation.
No friction modifier. The Truetrac is all gears with no clutch packs. Use a quality GL-5 gear oil in the viscosity your axle calls for.
No, it is the carrier only. Plan on new carrier bearings, ring gear bolts and a gasket or sealant, which are included in a master install kit for your axle.
Once the factory locking carrier is replaced, that axle no longer locks from the switch. If you want to keep selectable lockup on one axle, install the Truetrac in the other and leave that factory locker in place.
