What is a helical-gear limited-slip differential?

A helical-gear limited-slip differential, like the Eaton Truetrac, uses a series of gears to automatically distribute torque between the two wheels on an axle. When one wheel loses traction, the gears engage to send more power to the wheel that has grip, improving overall traction without the need for special fluids.

Does this differential require special fluids or additives?

No, the Eaton Detroit Truetrac is designed to be maintenance-free and does not require any special lubrication or friction modifiers. You can use standard gear oil compatible with your vehicle's differential.

What else might I need to install this differential?

While this differential is a direct replacement for the factory unit in many applications, you will typically need a gear installation kit, which includes bearings, seals, and shims, as well as the appropriate ring and pinion gears if you are changing the gear ratio. It's recommended to consult your vehicle's service manual or a professional mechanic for a complete parts list.

Eaton Detroit Truetrac Differential 913A477 - 34 Spline

Name: Eaton Detroit Truetrac Differential 34 Spline 1.37in Axle Shaft Diameter Rear 9.75in
Brand: Eaton
Price: 889.18 USD
Availability: InStock

Eaton Detroit Truetrac Differential 34 Spline 1.37in Axle Shaft Diameter Rear 9.75in

$889.18

Only 4 left in stock

Eaton Detroit Truetrac Differential 34 Spline 1.37in Axle Shaft Diameter Rear 9.75in. Maximizes wheel traction and enhances driving characteristics.

Key Features

Fits 31+ vehicle make/model combinations including Ford, Lincoln, and Mercury.
Helical-gear limited-slip differential maximizes wheel traction.
Smooth, quiet, and automatic operation in forward and reverse.
Maintenance-free design requires no special lubrication or friction modifiers.
Optimized torque bias ratios enhance acceleration and handling.
Features 34 splines and a 1.37-inch axle shaft diameter for strength.

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Product Details

What you get with this Eaton Detroit Truetrac differential is a well-built, helical-gear limited-slip unit designed to significantly improve traction for a wide range of vehicles. This isn't a clutch-based system; instead, it uses gears to automatically send power to the wheel with more grip, making it ideal for everything from daily drivers to off-road adventures. It works smoothly and quietly in both forward and reverse, and it's maintenance-free, meaning no special fluids or friction modifiers are needed, which simplifies installation and ownership.

The Truetrac's design is all about maximizing acceleration and handling by optimizing torque bias ratios. This means when one wheel starts to slip, the differential instantly engages to send power to the other wheel, helping you maintain control and momentum. With 34 splines and a 1.37-inch axle shaft diameter, this unit is built for strength and durability, ready to handle the demands of various Ford, Lincoln, and Mercury models. Its automatic engagement means you don't have to do anything; it just works, providing a more confident driving experience whether you're on the highway or tackling tougher terrain.

This differential is designed to fit a broad spectrum of vehicles, including popular models like the Ford F-150, Ford Expedition, and Ford Explorer, among many others. It's a solid option if you're looking to upgrade your vehicle's drivetrain for better performance and control in various conditions. Installation typically involves removing the old differential and installing the Truetrac in its place, often requiring a gear set and installation kit, which are usually sold separately.