Eaton Detroit Truetrac Differential for Ford F-150 Rear Axle, 34-Spline, 3.31 and Up Gear Ratio

The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Maintenance-free, it features smooth, automatic operation in forward and reverse. Its versatility makes Detroit Truetrac the ideal traction solution for almost any type of vehicle. Detroit Truetrac® Differential; 34 Spline; 1.36 in. Axle Shaft Diameter; 8.80 in. Ring Gear Dia.; 3.31 and Up Gear Ratio;

• Optimized Torque Bias Ratios Deliver Max Acceleration And Handling
• No Special Lubrication Or Friction Modifiers Needed
• Helical Gear Limited Slip Differential
• Durable; Smooth; Quiet Operation
• Works In Forward And Reverse
• Ideal For Most Vehicles
• Automatic Engagement

The Eaton Detroit Truetrac is a helical-gear limited-slip differential designed to improve traction, acceleration, and handling in compatible Ford F-150 rear axle applications. Its automatic operation transfers torque to the wheel with greater traction without requiring driver input, helping maintain controlled power delivery in changing road conditions.

Built for smooth, quiet, and durable performance, the Detroit Truetrac operates in both forward and reverse. Its maintenance-free design requires no special lubrication or friction modifiers, simplifying installation and long-term service. Optimized torque-bias performance makes it a practical traction solution for daily driving, towing, performance use, and other demanding applications.

This Eaton Detroit Truetrac differential is designed for compatible 2015–2016 Ford F-150 applications and uses a 34-spline configuration with a 3.31-and-up gear ratio. Confirm the original axle configuration, spline count, ring gear size, and gear ratio before ordering to ensure proper fitment. The differential is intended for rear axle use and should be installed according to the vehicle and axle manufacturer’s service procedures.

Key Product Specifications & Technical Data

• Brand: Eaton Detroit Truetrac
• Part Number: EAT917A739
• Differential Type: Helical-gear limited-slip differential
• Application: Rear axle
• Spline Count: 34 spline
• Axle Shaft Diameter: 1.36 inches
• Ring Gear Diameter: 8.80 inches
• Compatible Gear Ratio: 3.31 and up

What's Included

• One Eaton Detroit Truetrac limited-slip differential

Fitment: Compatible with select 2015–2016 Ford F-150 rear axle applications. Verify vehicle-specific axle and drivetrain specifications before installation.

Features:

• Automatic engagement distributes torque to the wheel with greater traction without driver input.
• Optimized torque-bias ratios support improved acceleration and handling.
• Maintenance-free helical-gear design requires no special lubrication or friction modifiers.
• Smooth, quiet, and durable operation works in both forward and reverse.

Fitments:
2015 Ford F-150 King Ranch
2015 Ford F-150 Lariat
2015 Ford F-150 Platinum
2015 Ford F-150 XL
2015 Ford F-150 XLT
2016 Ford F-150 King Ranch
2016 Ford F-150 Lariat
2016 Ford F-150 Limited
2016 Ford F-150 Platinum
2016 Ford F-150 SSV
2016 Ford F-150 XL
2016 Ford F-150 XLT
2017 Ford F-150 King Ranch
2017 Ford F-150 Lariat
2017 Ford F-150 Limited
2017 Ford F-150 Platinum
2017 Ford F-150 SSV
2017 Ford F-150 XL
2017 Ford F-150 XLT
2018 Ford F-150 King Ranch
2018 Ford F-150 Lariat
2018 Ford F-150 Limited
2018 Ford F-150 Platinum
2018 Ford F-150 Police Responder
2018 Ford F-150 SSV
2018 Ford F-150 XL
2018 Ford F-150 XLT
2019 Ford F-150 King Ranch
2019 Ford F-150 Lariat
2019 Ford F-150 Limited
2019 Ford F-150 Platinum
2019 Ford F-150 Police Responder
2019 Ford F-150 SSV
2019 Ford F-150 XL
2019 Ford F-150 XLT
2020 Ford F-150 King Ranch
2020 Ford F-150 Lariat
2020 Ford F-150 Limited
2020 Ford F-150 Platinum
2020 Ford F-150 Police Responder
2020 Ford F-150 SSV
2020 Ford F-150 XL
2020 Ford F-150 XLT
2021 Ford F-150 King Ranch
2021 Ford F-150 Lariat
2021 Ford F-150 Limited
2021 Ford F-150 Platinum
2021 Ford F-150 Police Responder
2021 Ford F-150 SSV
2021 Ford F-150 Tremor
2021 Ford F-150 XL
2021 Ford F-150 XLT
2022 Ford F-150 King Ranch
2022 Ford F-150 Lariat
2022 Ford F-150 Limited
2022 Ford F-150 Platinum
2022 Ford F-150 Police Responder
2022 Ford F-150 SSV
2022 Ford F-150 Tremor
2022 Ford F-150 XL
2022 Ford F-150 XLT
2023 Ford F-150 King Ranch
2023 Ford F-150 Lariat
2023 Ford F-150 Limited
2023 Ford F-150 Platinum
2023 Ford F-150 Police Responder
2023 Ford F-150 SSV
2023 Ford F-150 Tremor
2023 Ford F-150 XL
2023 Ford F-150 XLT

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1