Peterbilt Window Regulator R21-1022

• Peterbilt: 579, 567, 389, 388, 386, 384, 367, and 365.

• Kenworth: T680, T880, W900 (modern versions), T800, T660, and T440/T470.

• Part Number: R21-1022 (LH / Driver Side).

• Mechanism: Electric power cable-driven system.

• Components: Typically includes the metal regulator track and cable assembly; the motor may be sold separately or as a pre-installed unit depending on the supplier.

• Manufacturer: TinzerMotor

  Right-Hand Equivalent: The matching passenger-side part is R21-1022R.

  Key Features

• Direct Fit: Engineered to match factory mounting points for a "bolt-on" installation.

• Heavy Duty: Designed for the high-frequency use typical in commercial fleet and long-haul operations.

• Compatibility: Directly replaces and upgrades older units like the R21-1019 to improve window travel and reliability.

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

Alibaba Shop linkage:

Peterbilt Window Regulator R21-1022