Peterbilt 375/377 Brake Parts & Acc.

Frequently Asked Questions About Peterbilt 375/377 Brake Parts & Acc.

Will these brake parts fit my specific Peterbilt 375 or 377 model year?

Most of our brake components are designed to fit Peterbilt 375 and 377 models from 1987 through 2007. However, there can be variations based on your truck's configuration, especially between early models (1987-1999) and later models (2000-2007). We recommend checking your VIN or contacting our support team with your truck's year and any special specifications like axle configuration or brake system type (air disc vs. drum) to ensure proper fitment.

What's the difference between OEM and aftermarket brake parts for my Peterbilt?

OEM brake parts are manufactured to exact Peterbilt specifications and typically come with a higher price point but guaranteed fitment. Our aftermarket options from brands like Bendix, Meritor, and Gunite offer comparable quality at 30-50% less cost. These parts meet or exceed DOT standards and often feature improvements like better heat dissipation or longer wear life. For critical components like brake chambers and ABS modules, many drivers prefer OEM, while brake pads, rotors, and drums perform excellently in quality aftermarket versions.

How difficult is it to install brake components on a Peterbilt 375/377?

Installation difficulty varies by component. Brake pads and shoes can typically be replaced in 1-2 hours per axle with basic tools and mechanical knowledge. Air brake chambers and slack adjusters require more expertise and proper adjustment tools. ABS sensors and modules should be installed by experienced technicians due to calibration requirements. Always ensure you have the proper spring brake caging tools and follow OSHA lockout procedures when working on air brake systems.

How do I know when my Peterbilt 375/377 brake parts need replacement?

Key indicators include: brake shoes or pads worn to 1/4 inch or less, excessive slack adjuster travel (more than 2 inches), air leaks from brake chambers, cracked or heat-checked brake drums/rotors, or contaminated brake linings. During pre-trip inspections, check for proper pushrod travel and listen for air leaks. Most drivers replace brake linings every 200,000-300,000 miles depending on application, while drums and rotors typically last 400,000-600,000 miles with proper maintenance.

Can I mix different brands of brake components on my Peterbilt?

While it's technically possible to mix brands, we strongly recommend keeping the same brand and friction material across each axle for balanced braking performance. Never mix different friction ratings (like FF and GG rated materials) on the same axle. For best results, replace components in axle sets and use the same manufacturer for critical matching parts like brake chambers and slack adjusters. This ensures consistent braking force and helps prevent uneven wear or pulling issues.