TRC Detroit Differential Part No: RT40-4NR-R3.42L

$2,361.92

The TRC RT40-4NR-R3.42L Detroit Differential is designed to deliver reliable power transfer and improved traction in heavy-duty commercial trucks. Engineered to OEM standards, this differential efficiently distributes torque across the axle, helping maintain stability and performance under load. Its robust construction supports long service intervals and dependable operation in fleet and vocational applications. Available from Wofford Truck Parts, this Detroit differential is ideal for axle rebuilds, replacements, and professional drivetrain repairs where quality and proper fitment matter.

Specifications

The TRC RT40-4NR-R3.42L Detroit Differential is a durable, OEM-grade axle differential built for high-torque commercial truck applications. Designed to enhance traction and ensure smooth power delivery to the drive wheels, it plays a critical role in overall drivetrain performance. Manufactured to strict quality standards, this Detroit differential offers strength, reliability, and long-term durability in demanding operating conditions. It is well suited for fleet vehicles, regional haul trucks, and vocational equipment. Sold by Wofford Truck Parts, it provides a trusted solution for axle service and drivetrain maintenance.

Weight

430

Compatibility

Freightliner Cascadia — 2008–2019

Freightliner Columbia — 2003–2009

Kenworth T660 — 2008–2016

Kenworth T680 — 2013–2020

Peterbilt 386 — 2006–2015

Peterbilt 389 — 2008–2021

Western Star 4900 — 2004–2018