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
  • Fitment:Universal Fit
  • Axle Type:Dana 44
  • Availability:In Stock
  • 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).

Customer Reviews

5.0 5.0
3 Customer ratings
5.0 Good Locker

Worked great as a replacement for my stock 2004 Rubicon locker with 4.56 thick cut gears

from Texas |
5.0 2004 TJ Rubicon factory locker replacement

On the 2003 through 2006 TJ rubicon you have to get the 3.92 and down even though you have 4.10 gears. The factory gears are thick cut.



Question & Answers

25 Answered questions

Q: Will it fit 2500 GMC Sierra Denali 2020 Answer this question

A: Call Eaton.  They are extremely helpful and they have the answer.  

Answered by Chris from Hensley, AR. on 02/22/2023

Q: I have a 2004 TJ Rubicon with stock locker and 4.56 thick gears will the E-Locker - 19977-010 work as a replacement for the stock locker or do I need E-Locker 19969-010? Answer this question

A: I do not know.  Call eatons tech department and they can tell you.  They are extremely helpful.  

Answered by Chris on 12/01/2022

Q: I'm having a hard time getting a clear answer on which Eaton E-locker to buy for my 2004 Jeep Wrangler Rubicon with the thick cut 4:10 ring gear. The 19969-010 is apparently for the thin cut ring gears. The other choice is the 19977-010. Can't get an answ Answer this question

A: Even though you have 4:10 gears you have to get the one for 3:73 and under.  It’s because the rubicon has the thick cut gears. You can call Eaton and they will verify this. I have had mine for several months now and works fine. It’s the 19977.  I have a 2004 rubicon. 

Answered by Chris on 08/27/2022

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


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


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