Eaton ELocker Front Differential Fitment Confirmed for 6th Gen Toyota 4Runner

[Trail4R]

Good news for anyone planning a front locker upgrade on the 6th Gen 4Runner. Eaton ELocker front differential fitment is now confirmed (ON THE FRONT), and the part numbers are straightforward depending on whether you stay on factory gears or plan to regear.

Factory Gear Ratio Overview

To the best of current knowledge, all 6th Gen 4Runners run a 3.58 factory gear ratio, regardless of hybrid or non-hybrid drivetrain. That simplifies things for anyone staying stock or upgrading later.

Eaton ELocker Front Part Numbers

• Factory gears (3.58) Use Eaton ELocker 3.73 ratio and down
• Part number: 14219-1

This will apply to the majority of owners running factory gearing.

Regeared setups

Expected common ratios after regear will likely be 4.56, 4.88, and possibly 5.29 as the platform develops

• Use Eaton ELocker 3.91 and up
• Part number: 14221-1

If you are planning a gear swap now or down the road, this is the correct option.

Important Notes

• This confirmation is for the front differential only
• Rear ELocker options are not confirmed yet

There is an indication that a rear solution is coming or already in development, but no official details or part numbers are available at this time

If you are building a 6th Gen for technical terrain, this opens the door for a true selectable front locker solution with factory-style engagement. Rear fitment updates will be posted once confirmed.

And a few shots on the Rubicon after we installed the locker. Confirmed fitment and confirmed functionality.

The Eaton front e-locker is by far one of the best mods you can do to your 6th Gen if you're looking to wheel harder.