Eaton ELocker Differential Dana 44 (M220) 35 Spline
Built a Jeep Wrangler JL or Gladiator JT rear axle around 35-spline chromoly shafts and still want a switch on the dash to lock it? The Eaton ELocker 14313-2 is the selectable electric locker for the Dana 44 M220 rear axle in that configuration. It drives like an open differential on pavement, and one press of the included rocker switch locks both rear tires together for rocks, ledges and mud. It is not a drop-in for a stock axle: the factory M220 shafts are 32-spline, and this case is cut for 35.
The M220 is the 220 mm (about 8.7 inch) ring gear version of the Dana 44 used as the rear axle under Gladiators and many JL Wranglers. Inside the ELocker is a four-pinion, net-forged gear set that works as a normal open differential until you energize it. Power from the switch feeds an electromagnetic stator that pulls a locking collar into the side gear, so both axle shafts turn at the same speed and each tire gets the full available torque. Turn the switch off and a return spring releases the lock. Because it is electric, there is no compressor or air line to route, and it locks in forward and reverse. The 35-spline version uses a 1.50 inch shaft with 24/48 diametral pitch, 30 degree pressure angle splines, and it accepts all gear ratios.
If a factory or Eaton locker simply will not engage, check wiring and the stator first; our ELocker not engaging guide walks through it, and JL locker actuator problems covers the Rubicon system.
Read the axle tag to confirm a Dana 44 M220 rear, then confirm your shafts are 35-spline. If you still run stock 32-spline shafts, this is the wrong case; the 32-spline JL/JT ELocker is built for those. Our Dana 44 problems and rebuild cost guide covers what else to inspect while the carrier is out.
Retail application lists put the 14313-2 on the rear Dana 44 M220 in 2018-up Jeep Wrangler JL two-door and four-door models and 2020-up Gladiator JT, all gear ratios, with aftermarket 35-spline axle shafts required. Eaton's catalog note adds that Rubicon models need an aftermarket locker control harness to tie into the factory locker switch. A JL without the M220 rear may have a smaller Dana 35 instead, so check the tag, or send us your year and VIN. Other JL and JT axle parts are on our Wrangler JK and JL page and in the hard parts category.
Eaton rates this a level 3 advanced job, roughly six to eight hours. The stator must come off the case before the ring gear goes on, then goes back in this order: ring gear, stator assembly, carrier bearing. Fit new carrier bearings, check backlash and pattern, and route the stator wire out of the housing where it cannot rub on the ring gear. If you are changing ratio at the same time, the Revolution JL/JT Dana 44 rear ring and pinion with master install kit covers gears and bearings in one box, and the Yukon M220 rear axle bearing and seal kit is cheap insurance while the shafts are out. Eaton recommends a quality petroleum GL-5 gear oil, with synthetic acceptable where the axle maker allows; the ELocker has no clutch packs, so it does not need friction modifier. Cycle the locker a few times on a stand before the first trail run.
| Brand | Eaton |
| Part number | 14313-2 |
| Fits | Eaton ELocker Differential Dana 44 (M220) 35 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. The factory M220 rear shafts are 32-spline and the 14313-2 is cut for 35-spline shafts. Use the 32-spline JL/JT ELocker with stock shafts, or install 35-spline aftermarket shafts with this one.
Yes. Eaton includes its locking rocker switch and wiring harness. Rubicon owners who want to use the factory locker button need an aftermarket locker control harness.
All ratios. There is no carrier break on this unit, so it works with stock gears or a re-gear.
Eaton recommends a quality petroleum GL-5 gear oil; synthetic is fine if the axle maker allows it. No friction modifier is needed because the ELocker has no clutch packs.
Expect six to eight hours with a press and a setup gauge. The stator must be removed before the ring gear is bolted on, then reinstalled before the carrier bearing, and backlash must be checked.
