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Toyota 8.4" T100 and Tacoma Eaton Detroit TrueTrac | Rear 30 Spline
Eaton Detroit TrueTrac
Photo is for illustration purposes only and may
not be an accurate depiction of this product.

Price: $599.95

Status: Contact Us for Availability
Product Code: EAT-913A541

Description Compatibility Part Numbers

Eaton Model: Application: Axle Shafts: Gear Ratios:
913A541 Toyota 8.4"
T100 / Tacoma
30 Spline 3.54 - 5.29

This Eaton TrueTrac locker fits Toyota 8.4" T100, Tacoma, and Tundra rear axles with 30 spline axle shafts.

This differential fits 3.54 to 5.29 gears only.

How Does The Eaton TrueTrac Compare To Other Lockers?

[ Jump To Eaton TrueTrac Section Of Video | Crawlpedia Differential Locker Comparison ]

(To skip ahead to the Eaton TrueTrac section of the video, go to minute 6:05 or click here.)

Detroit TrueTrac lockers are Torsen style limited slip differentials that use helical gears instead of clutch packs to offer automatic torque biased traction to both drive wheels at all times. The ingenious design limits the speed of each wheel to 1.5 times faster or slower than the opposite wheel to provide full-time traction while still allowing for wheel speed differentiation in turns. The heavy duty all-gear design not only makes for quite and smooth operation, it requires no maintenance and will never weaken or wear out like a typical limited slip differential. These unique features make the Detroit TrueTrac ideal for race cars, rally cars, trail rigs, full size trucks, and daily drivers.

The Detroit Truetrac is a Torsen style differential that provides constant power to both drive wheels at all times while still allowing for wheel speed differentiation. The design works so well that the US military chose the Torsen differential as standard equipment on the Hummer H1.

Eaton specifically designed and built the Detroit TrueTrac locker for use in 4x4 vehicles and to withstand the abuses of off-roading. Precision forged gears, high strength materials, and high-tech manufacturing procedures make the TrueTrac one of the most durable and reliable limited slip lockers on the market today. They are easy to install and maintenance free.

Eaton images are © Copyright Eaton Corporation, used with permission.
Additional images and product descriptions are © Copyright Filthy Motorsports, LLC.
  • Torque biasing helical gear design
  • Smooth, quiet, and automatic operation
  • Works in front or real axle applications
  • Maintenance free limited-slip locker
  • Heavy duty construction
  • ABS Compatible

Average Customer Review: Average Customer Review: 5 of 5 5 of 5 Total Reviews: 1 Write a review.

  2 of 2 people found the following review helpful:
5 of 5 100% Satisfied January 15, 2020
Reviewer: Brad C  
I purchased this Eaton TrueTrac for my 2006 Toyota Tacoma, I am so pleased with my purchase I am now in the process of ordering the same thing for my 2000 Jeep XJ. I had the good fortune to speak with Ben prior to my purchase. I was never rushed, all my novice questions were answered with time and patience. The web site is easy to navigate yet with my lack of experience in what I needed I wanted to make sure I would order correctly the first time , thus the reason for the call. All in all I couldn't be happier. Great communication, great recommendation on what I needed and probably the best possible diff for my life style. 100% satisfied. Keep up the good work!

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