EATON 19977-010 Performance 4 Pinion ELocker for 30 Spline Dana 44 with 3.73 & Numerically Lower Gear Ratio
Quadratec Part #:
16100-1017
EATON Part #:
19977-010
MSRP
$1,606.37
Discount
-$247.38
In Cart Price
$1,358.99
Guaranteed Best Price
$1,358.99
In Stock
Ships tomorrow if you order within 15 hours 1 min.
Description
When you need On-Demand control of your Jeeps traction, the Eaton 4-Pinion E Locker employs and electromagnetic locking mechanism, for the next generation of differential technology. Performing as an open differential for daily driving and choice conditions, you decide when to flip the switch and lock the axles, delivering equal torque to both wheels. Designed for 30-spline Dana 44 Rear axles, you can upgrade your Sport or Sahara model Wrangler using 19977-010 with stock or aftermarket gear ratios.
JK Wrangler Rear Axle Only! Fits All Gear Ratios
Not For Rubicon Front Axle Applications
Not For Rubicon Front Axle Applications
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Details
ELocker 4 Differential Specifications:
- Axle Fitment - Dana 44
- 4 Pinion Design
- Spline Count - 30 Spline
- Ratio Fitment - 3.73 & numerically lower
- Ring Gear Diameter - 8.5"
- Axle shaft diameter - 1.31"
- Double Drilled - 7/16" & 1/2" Holes
- Axle Model: Dana 44
- Axle Position: Front, Rear
- Shipping Weight: 30lb
- Shipping Dimensions: 10in x 10in x 10in (L x W x H)
Jeep CJ-5
- 1975 Jeep CJ-5
- 1974 Jeep CJ-5
- 1973 Jeep CJ-5
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- 1971 Jeep CJ-5
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Jeep CJ-7
- 1986 Jeep CJ-7
Jeep Wrangler (TJ)
- 2006 Jeep Wrangler (TJ)
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Jeep Wrangler 2-Door (JK)
- 2018 Jeep Wrangler 2-Door (JK)
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Jeep Wrangler Unlimited 4-Door (JK)
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- 2010 Jeep Wrangler Unlimited 4-Door (JK)
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EATON Performance 4 Pinion ELocker Reviews
Daryl E.
3/22/2024
I replaced the open diff in my '08 JKU Sahara with this locker two years ago. Engages and disengages smoothly. Has been wheeled hard a handful of times with no issues. Paired with Yukon chrome moly axel shafts and 4.88 gears on 35s. I have full confidence in this unit with this setup.
Thomas W.
12/22/2021
Good product
Clay K.
10/6/2021
Mechanic got the locker installed, and it won't lock at below 20mph. Eaton was great to troubleshoot with the mechanic and say the would warrant the part. Quadratec was super easy to deal with on it, and got a replacement out the same day. I am still stuck paying the labor to swap the defective part. Confident it will he a great addition to the Jeep when we get it squared away.
Questions
Michael H.
I’ve a 2026 Gladiator Sahara which is an optioned sport, I think. I’m looking to add rear axel lock and use an ORM switch. I want to make sure the kit works with both with the 2026 Sahara and that I can leverage the 68359091AA switch? I realize I will have to also get a programmer.
Yes, that locker works with your 2026 Gladiator, but there is a major fitment detail to check regarding your axles and gear ratio:
Axle Spline Mismatch: The EATON 19977-010 Performance 4 Pinion ELocker is built for 30-spline axle shafts. However, a 2026 Gladiator non-Rubicon (Sport or Sahara) rear axle typically utilizes 32-spline shafts (M220 housing), meaning this 30-spline unit will not drop onto your factory shafts without upgrading to aftermarket 30-spline axle shafts.
Switch Compatibility: You can leverage the Mopar Off-Road Switch 68359091AA (or an auxiliary switch bank setup) to trigger the locker, but you are correct that a digital programmer/OBD flash (such as a Tazer JL or similar tool) will be required to enable the locker circuit in your Gladiator's Body Control Module.
Axle Spline Mismatch: The EATON 19977-010 Performance 4 Pinion ELocker is built for 30-spline axle shafts. However, a 2026 Gladiator non-Rubicon (Sport or Sahara) rear axle typically utilizes 32-spline shafts (M220 housing), meaning this 30-spline unit will not drop onto your factory shafts without upgrading to aftermarket 30-spline axle shafts.
Switch Compatibility: You can leverage the Mopar Off-Road Switch 68359091AA (or an auxiliary switch bank setup) to trigger the locker, but you are correct that a digital programmer/OBD flash (such as a Tazer JL or similar tool) will be required to enable the locker circuit in your Gladiator's Body Control Module.
Roland L.
Does the EATON 19977-010 work in the Dana 44 30spline rear diff, non-rubicon with 3.21:1 gear ratio? Also, what all comes with the kit?
Yes, the EATON 19977-010 Performance 4 Pinion ELocker is fully compatible with a non-Rubicon Dana 44 rear differential running a 3.21:1 gear ratio and 30-spline axle shafts. Because 3.21 is numerically lower than 3.73, this specific -010 model is designed precisely for your gear ratio bracket (3.73 and down).
What Comes in the Kit
Eaton ELocker Differential Assembly: The complete 4-pinion electronic locking differential unit, which is double-drilled to accept both 7/16-inch and 1/2-inch ring gear bolts.
Wiring Harness & Switch: Pre-wired harness, relay, and a dash-mounted activation switch to control the 12V electromagnetic locking mechanism.
Coil Assembly & Retaining Clip: The electromagnetic coil and necessary mounting hardware that secure inside the differential housing.
Instruction Manual: Installation guide and wiring diagrams.
(Note: Master installation bearing kits, carrier bearings like Timken LM102949/LM102911, and gear oil are typically sold separately.)
What Comes in the Kit
Eaton ELocker Differential Assembly: The complete 4-pinion electronic locking differential unit, which is double-drilled to accept both 7/16-inch and 1/2-inch ring gear bolts.
Wiring Harness & Switch: Pre-wired harness, relay, and a dash-mounted activation switch to control the 12V electromagnetic locking mechanism.
Coil Assembly & Retaining Clip: The electromagnetic coil and necessary mounting hardware that secure inside the differential housing.
Instruction Manual: Installation guide and wiring diagrams.
(Note: Master installation bearing kits, carrier bearings like Timken LM102949/LM102911, and gear oil are typically sold separately.)
Curtis/Marsha A.
I have a 1969 cj5. I’m planning to install this in the open diff What about the spline count?
The EATON 19977-010 Performance 4 Pinion ELocker is specifically built for 30-spline axle shafts (with a 1.31-inch diameter shaft design).
However, there is an important fitment consideration for your 1969 Jeep CJ5:
Factory Spline Count Mismatch: A stock 1969 CJ5 typically came equipped with a Dana 44 rear axle featuring 19-spline axle shafts (or a Dana 30 front / Dana 27/44 variation depending on exact build).
What This Means: While this ELocker drops into a Dana 44 carrier housing and replaces an open differential, it will not accept your factory 19-spline axle shafts. To install this 30-spline locker into your 1969 CJ5, you will also need to upgrade your axle shafts to aftermarket 30-spline shafts (such as Chromoly shafts designed for early CJ Dana 44s) so that the spline counts match.
However, there is an important fitment consideration for your 1969 Jeep CJ5:
Factory Spline Count Mismatch: A stock 1969 CJ5 typically came equipped with a Dana 44 rear axle featuring 19-spline axle shafts (or a Dana 30 front / Dana 27/44 variation depending on exact build).
What This Means: While this ELocker drops into a Dana 44 carrier housing and replaces an open differential, it will not accept your factory 19-spline axle shafts. To install this 30-spline locker into your 1969 CJ5, you will also need to upgrade your axle shafts to aftermarket 30-spline shafts (such as Chromoly shafts designed for early CJ Dana 44s) so that the spline counts match.
