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TRE 4x4

8" IFS Clamshell, 53mm Electric Locker, Front 3.73 Down, 53mm, Toyota 03-23 by TRE 4x4

8" IFS Clamshell, 53mm Electric Locker, Front 3.73 Down, 53mm, Toyota 03-23 by TRE 4x4

$1,273.95 USD
$1,273.95 USD
Sale Sold out

ELEC-LOCKER

Designed expressly for 4-wheel drive systems off road adventure to give you the ability to lock or unlock the differentials when necessary, electromagnetic operated keeps you away from malfunctions. It is engaged by electric. The working principle of ELEC-LOCKER is controlled by energizing the magnet, when vehicles get stuck in some obstacles, driver just turn on the button of ELEC-LOCKER, the magnet in the ELEC-LOCKER is powered, pushing the gear to lock both axles, engaing the half axles together, provide 100% of available torque and sending it equally to both ends of the axle.

TRE ELEC-LOCKER equipped with the developed gear, the locking depth has been increased from 2mm for ordinary products to 5mm, which fundamentally solves the problems of automatic unlocking or insufficient locking effect in similar products. The gear adopts a nickel-plated design, which is fully rust-proof and greatly improves the degree of wear resistance, significantly improve the service life and locking efficiency of the product.

TRE Wave Spring equipped makes locking and unlocking elasticity more stable and endurable because of wave spring fit tight radial and axial spaces. Most importantly, Wave spring reducing the spring height by 50% than the ordinary coil / compression springs, so there is no need to drill the spring holes too deep on the clutch gear, this increased clutch gear strength tremendously. 


Features
Driver-selectable electronic locker — open under normal conditions, full-lock on demand.
Net-forged internal gears for high strength & durability.
30 spline axle shafts, compatible with 8″ ring gear IFS Toyota front axles.
Works with 3.73 & down gear ratios—tight clearance for numerically higher gear ratios.
Clamshell style housing design for structural rigidity and easier mechanical integration.
Sealed electromagnet locking mechanism, relatively low maintenance.
OEM-grade materials, designed for trail, rock crawl, towing or off-road hardships.
Weight ~23.04 lb for the assembly—manageable for front axle replacement. 

Specifications
Part Number: TRETE121
Differential Type: Selectable Locking (Electronic ELocker)
Ring Gear Size: 8.0‑inch front IFS Toyota axle
Spline Count: 30 splines
Compatible Gear Ratio: 3.73 & down (numerically lower) only
Weight: approx. 23.04 lb (≈10.45 kg)
Product Note: housing may require relief grinding to properly seat electromagnet; fits clamshell style housing only.

Included Components
1x TRE4x4 ELocker Differential Carrier Assembly (PN TRETE121)
1x Electromagnet locking module included with carrier (built in) — verify OEM wiring and switch compatibility
1x Mounting hardware kit typical for front IFS installation (bolts, seals, gaskets) — check kit contents with vendor 

Product Description
The TRE4x4 TRETE121 ELocker is a front selectable locking differential built for Toyota 8‑inch independent front suspension (IFS) applications with 30‑spline axle shafts. Under normal driving, it behaves like an open differential for smooth turns, tire longevity, and lower noise. When traction is lost—on rocks, mud, snow, or steep inclines—the driver flips a switch and the electromagnet locks the differential, sending full torque equally to both front wheels.

This product is engineered specifically for front IFS spindles of the Toyota models listed above, provided the ring & pinion gear ratio is 3.73 or numerically lower (i.e. 3.73 & down). It will not function properly with higher numerical gear ratios (3.91 & up), nor with housings not matching the clamshell style or with different bore/spline counts. For 2025 models, fitment is confirmed through the application guide up to 2025 for Toyota 4Runner and Tacoma front IFS with the stated specifications.


TRE4x4 provides a stable 5-year warranty with extensive distribution network and high-quality after-sales service to provide 100% after-sale protection
Strongest 4320 chromoly alloy steel gears provide the most rugged quality and the most stable work efficiency
Under the continuous research and development of TRE4x4 , more available models for more popular models are constantly being updated
The hardest hardness and increased thickness to make it provide the best working efficiency and stability when locked

Common Differential Specs:

  • Type: 8" IFS Clamshell Housing

  • Axle Spline: 30-spline

  • Pinion Spline: 29-spline (varies slightly by gear set)

  • Carrier Break: 3.91 and up vs. 3.73 and down

Fitment Notes

  • Only fits *clamshell style housing.*
  • Housing may require **relief grinding** to properly seat the electromagnet. 
  • Fits only 8" IFS front axle with **30‑spline** axle shafts.
  • Ring & pinion gear ratio must be **3.73 or numerically lower (3.73 & down)**. 
  • Does *not* fit 8″ IFS with 3.91 & up gear ratios—other Eaton models (e.g. 14221‑1) cover those. 
  • Some models (e.g., GX470, GX460) may have multiple housing & bearing variants; confirmation advised.

Vehicle Fitment Chart – Toyota 8" IFS Front Differential

Vehicle Model Years Engine Suspension Notes
Toyota 4Runner 2003–2025 4.0L V6 Front IFS Compatible with 8" IFS, 30-spline axles
Toyota Tacoma 2005–2023 2.7L I4, 3.5L V6 Front IFS Compatible with 8" IFS, 30-spline axles
Toyota FJ Cruiser 2005–2014 4.0L V6 Front IFS Direct fit for 8" IFS differential
Toyota Land Cruiser Prado 120 2002–2009 4.0L V6 Front IFS Overseas model; matches 8" IFS spec
Toyota Land Cruiser Prado 150 2010–2018 4.0L V6 Front IFS Overseas model; confirmed 8" IFS fitment
Lexus GX470 2003–2009 4.7L V8 Front IFS Verify 8" IFS housing and 30-spline axle compatibility
Lexus GX460 2003–2024 4.6L V8 Front IFS Confirm 8" IFS and 30-spline axle match

 

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