Peterbilt Window Regulator R21-1018

The R21-1018 (or R21-1018R) is an electric (power) window regulator for the right-hand (passenger) side of Kenworth trucks. It is part of the modern Paccar power window system.

Key Specifications

Part Number: R21-1018 (Right-Hand)

Left-Hand Equivalent: R21-1017 (or R21-1017L)

Operation: Electric (Power)

Mechanism: High-torque motor with a scissor-style or cable lift assembly (depending on the specific door generation)

Vehicle Fitment

This Kenworth window regulator R21-1018 (or R21-1018R) is a standard replacement for several Kenworth heavy-duty models, typically from the 2010s to the early 2020s:

Kenworth T680 / T880: Often used in the aerodynamic "Next Gen" cabs.

Kenworth W900 / T800: Used in newer builds equipped with factory power windows.

Kenworth T660: Late-model versions.

Quality and Testing

TinzerMotor produces these window regulators and window motors with a focus on long-term high quality and mechanical reliability:

Heavy-Duty Construction: Uses thickened steel plate components and reinforced pivot points to prevent the "sagging" or jamming common in lower-quality aftermarket parts.

Extensive Testing: Each unit undergoes rigorous cycle testing, involving thousands of manual rotations under simulated glass weight to ensure the internal gears do not strip or slip over time.

Precision Fit: Designed to align perfectly with the original door mounting holes, ensuring a "bolt-on" installation without the need for drilling or modification.

Please contact: 

Ms Riva  

Wechat/WhatsApp +86 15355970956 

Email: riva@ruishuoautoparts.com