What makes the Detroit Truetrac a limited-slip differential?

The Detroit Truetrac uses a system of helical gears that automatically bias torque to the wheel with more traction. When one wheel starts to slip, the gears engage to transfer power to the wheel that still has grip, improving overall traction without requiring driver input.

Does this differential require special fluids or additives?

No, the 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 axle and differential setup.

What else might I need to install this differential?

Besides the differential itself, you will typically need a new ring and pinion gear set, differential bearings, and a master installation kit which includes necessary seals, gaskets, and hardware. It's recommended to consult the manufacturer's installation guide for a complete list of required components.

Eaton Detroit Truetrac Differential 916A427 - 37 Spline

Name: Eaton Detroit Truetrac Differential 37 Spline 1.60in Axle Shaft Diameter 4.10 & Up Ratio
Brand: Eaton
Price: 1090.57 USD
Availability: InStock

Eaton Detroit Truetrac Differential 37 Spline 1.60in Axle Shaft Diameter 4.10 & Up Ratio

$1090.57

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Eaton Detroit Truetrac Differential. Maximizes traction with smooth, automatic operation for improved acceleration and handling.

Key Features

Fits vehicles with Dana 80 rear axles and 37 spline, 1.60-inch diameter axle shafts.
Designed for vehicles with 4.10 and numerically lower ring and pinion gear ratios.
Helical-gear limited-slip differential maximizes traction for improved acceleration and handling.
Smooth, quiet, and maintenance-free operation with no special lubrication required.
Works automatically in both forward and reverse for consistent performance.
Durable construction ensures long-lasting use in various driving conditions.

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Will this fit your vehicle?

Product Details

If you're looking to get more grip from your truck or van, especially when towing or hauling, the Eaton Detroit Truetrac differential is a solid choice. This helical-gear limited-slip unit works automatically to send power to the wheel with the most traction, improving acceleration and handling whether you're on the street, trail, or pulling a heavy load. It's designed to work seamlessly in both forward and reverse, providing consistent performance without any fuss.

What sets the Truetrac apart is its maintenance-free design. Unlike some other limited-slip differentials, it doesn't require special lubrication or friction modifiers, making it a straightforward upgrade. The helical gears are well-built for durability and operate smoothly and quietly, so you won't deal with the chattering or noise that can come with other traction systems. This differential is a popular choice for a wide range of vehicles, including many Ford E-Series vans, Chevrolet C/K3500 trucks, and even some Ford F-350 models, fitting vehicles with Dana 80 axles and a 4.10 or numerically lower gear ratio.

When installing this differential, ensure your vehicle is equipped with a Dana 80 rear axle and that your axle shafts are 37 spline with a 1.60-inch diameter. It's designed for ring and pinion gear ratios of 4.10 and numerically lower. This unit is a direct replacement for your factory open differential, offering a significant improvement in traction without compromising daily drivability. You'll want to have the appropriate ring and pinion gears, bearings, and installation kit ready for the job.