Eaton ELocker4 Differential Dana 44 Front 30 Spline 3.92 & Up Ratio
Regearing a Dana 44 to 4.10, 4.56 or 4.88 for bigger tires is the moment most owners also decide to add a locker, and a 30-spline Dana 44 with 3.92 or deeper gears takes the Eaton ELocker4 19969-010. It is a switchable full locker that drives like an open differential until you need it. Jeep CJ, YJ and TJ owners use it most, along with International Scout, older Ford, Dodge and GM 4x4 trucks and Dana 44 swaps under all kinds of trail rigs.
On the road the 19969-010 differentiates like a stock open carrier, so the axle turns smoothly and does not scrub tires. When the switch is pressed, a 12 volt electromagnet locks the differential and both 30-spline shafts turn as one, so the tire that has traction keeps the rig moving. The 4 in ELocker4 refers to four pinion gears, which share the load across more teeth than a two-pinion carrier. Eaton specs it for an 8.5 inch ring gear and 1.31 inch shafts, and the unit weighs about 27 pounds.
Whine from worn ring and pinion bearings and leaking axle seals are common Dana 44 problems too; our Dana 44 axle problems guide covers what to inspect while the axle is apart.
Standard Dana 44 axles use two carrier sizes split by gear ratio. Gears of 3.92 and numerically higher, such as the Yukon Dana 44 4.56 gear set, mount on this case. Ratios of 3.73 and lower need the ELocker4 19977-010 for 3.73 and down. One exception trips people up: the 2007-2018 JK rear Dana 44 uses thick ring gears that mount on the 3.73-down carrier at any ratio, so a regeared JK rear does not take this unit. Read the ring gear tag or count driveshaft turns, and count the shaft splines; 19969-010 is 30-spline only. The carrier break guide explains why the split exists.
The listing title says front, but Eaton catalogs 19969-010 for Dana 44 front and rear axles. Eaton's application list includes 1970-2009 Jeep front Dana 44s and 1971-2006 Jeep rear Dana 44s, 1967-1980 International Harvester pickups, Scout I and II and Travelers, 1967-1996 Ford three-quarter-ton fronts, 1970-1982 Ford half-ton fronts and 1977-1979 Ford half-ton rears, 1969-2001 Dodge half-ton fronts, GM half and three-quarter-ton fronts through 1980, and 1993-2000 Isuzu Rodeo rears. Quadratec notes it is not compatible with the 1997-2006 Wrangler Rubicon axles. Many of these vehicles came with 3.73 or lower gears or different spline counts, so confirm the tag, ratio and splines, or send us the year and VIN. More axle parts are on our hard parts page.
| Brand | Eaton |
| Part number | 19969-010 |
| Fits | Eaton ELocker4 Differential Dana 44 Front 30 Spline 3.92 & Up Ratio |
| 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.
Yes. Eaton catalogs it for Dana 44 front and rear axles, including 1971-2006 Jeep rear Dana 44s, as long as the axle has 30-spline shafts and 3.92 or deeper gears.
No. The 2007-2018 JK rear Dana 44 uses thick ring gears that mount on the 3.73-and-down carrier regardless of ratio, so a JK rear takes 19977-010 instead.
Quadratec lists it as not compatible with the 1997-2006 Wrangler Rubicon axles. Rubicons came with factory selectable lockers.
Order by the new ratio. At 4.56 a standard Dana 44 uses the 3.92-and-up case, which is this unit.
New carrier bearings and shims, ring gear bolts, gear oil, and new gears if you are regearing. The locker includes Eaton's switch and wiring harness but not bearings.
