Eaton Dana 44 30 Spline 3.73 Down 4 Pinion E-Locker - 19977-010

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  • Eaton | Part Number: EAT19977-010
  • Popular Axle Manufacture:Dana
  • Axle Location:Rear|Front
  • Axle Type:Dana 44
  • Fitment:Universal Fit
  • Axle Spline:30 Splines
  • Differential Type:Selectable Locker


The Eaton ELocker4 is an electronic, selectable differential designed for drivers that need traction on-demand. At the flip of a switch, drivers can go from open to 100-percent locked and back again. The 4 pinion gear design provides added strength and capability for more extreme vehicles, and features the fastest engagement (.14 seconds).

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Question & Answers

17 Answered questions

Q: whill this locker fit 2019 Chevrolet silverado custom. RWD Answer this question

A: This a Eaton Dana 44 30 Spline 3.73 Down 4 Pinion E-Locker - 19977-010 2019 Chevrolet Silverado custom. RWD -See: 2014 - Current GM | Axle Desc: 12 Bolt | Ring Gear Dia: 9.5"/9.76" | Spline: 33 | Gear Ratio: 3.42, 3.73 | PN: 917A732 (Detroit Truetrac) Note: Factory oil drain plug may require relief grinding for correct fitment.

Answered by Dave from 4WP HQ on 12/23/2021

Q: Will this work with 488 gears  Answer this question

A: No, the Eaton | Dana 44 | 30 Spline | is 3.73 Down - PN: 19977-010 - use: Eaton | Dana 44 | 30 Spline | 3.92 Up R&P | E-Locker - PN: 19969-010 to work with 4.88 R&P

Answered by Dave from 4WP HQ on 12/10/2021

Q: Will this locker work in the front as well or is this specifically for the rear? Planning to install it on a 97 XJ Answer this question

A: The Eaton Dana 44 30 Spline 3.73 Down 4 Pinion E-Locker - PN: EAT19977-010 will fit in the front or rear Dana 44 w/ 30 spline axles.

Answered by Dave from 4WP HQ on 10/27/2021

Q: Does this locker come with a wiring harness and shims? Answer this question

A: Wiring and switch included, PN: 19977-010 for all gear ratios and does not require special bearings.

Answered by Dave from 4WP HQ on 10/04/2021

Q: Would this product fit a dana 44 ifs (ttb)from a 1995 f-150 . Im concern about the c-clip on the passenger side . Answer this question

A: Here is the Front Differential available from Eaton. Model Year: 1983 - 1997 | Axle: Dana 44 C-Clip IFS | Gear Dia: 8.5" | Axle Shaft Dia: 1.31" | Spline Count: 30 | Gear Ratio: 3.73 & dn | TrueTrac PN: 913A591

Answered by Dave from 4WP HQ on 09/08/2021


The Eaton Corporation has enjoyed over a century of innovation and is in the business of powering Jeeps with a top-rate lineup of lockers, open differentials and limited slips. Traction performance is critical while jeeping and we carry Eaton components for upgrading vehicle traction. Compatible with different axle splines and various gears, these parts are often rebuildable and are top performers on and off-road. Eaton's rich tradition of engineering innovative, dependable products extends to off-road parts and accessories for 4x4s and they have evolved to become the industry standard in differentials, lockers and limited slips. Shop Eaton Now