Frequently Asked Questions About Kenworth T660 Disc Brake Parts

Will these disc brake parts fit my specific year Kenworth T660?

Our disc brake components are designed to fit Kenworth T660 models from 2008 to 2017. However, brake specifications can vary based on your truck's axle configuration and GAWR (Gross Axle Weight Rating). We recommend checking your VIN or calling our parts specialists at 1-888-875-7787 with your truck's details to ensure proper fitment. Most T660s use either Bendix or Meritor brake systems, and knowing which system you have is crucial for ordering the correct parts.

What's the difference between OEM and aftermarket brake rotors for my T660?

OEM rotors typically cost 30-40% more but offer exact factory specifications and proven durability. Quality aftermarket options like Gunite or Webb provide comparable performance at a lower price point, often featuring improved ventilation designs for better heat dissipation. Both options generally last 150,000-200,000 miles under normal operating conditions. The key is ensuring the rotor meets or exceeds your truck's minimum thickness specifications and matches your hub pilot diameter (typically 8.78" for most T660s).

Can I replace just the brake pads, or should I always replace rotors too?

You can replace pads independently if your rotors measure above the minimum thickness (usually stamped on the rotor edge) and show no heat cracks, scoring deeper than 0.060", or excessive runout. Most T660 rotors have a service limit around 1.535" thickness. As a general rule, rotors typically last through 2-3 pad changes. Always replace rotors in axle sets to maintain balanced braking. Using a micrometer to check rotor thickness at multiple points is essential for making this decision.

What tools and skills do I need to install disc brake parts on my T660?

Basic installation requires a 3/4" drive socket set, torque wrench capable of 450-500 ft-lbs for wheel bearings, brake spring tools, and a dial indicator for checking runout. The job typically takes 3-4 hours per axle for experienced mechanics. Critical steps include proper wheel bearing adjustment, correct caliper alignment, and achieving specified rotor runout (less than 0.005"). Many drivers choose professional installation due to DOT requirements and the specialized tools needed. Improper installation can lead to premature wear or brake failure.

How do I know when my T660's disc brakes need replacement?

Key indicators include brake pad thickness below 1/4", metal-on-metal grinding sounds, increased stopping distances, or air pressure dropping more than 3 PSI during brake applications. Visual inspection should reveal any heat discoloration (blueing) on rotors, which indicates overheating. The T660's dash warning light will typically activate when pads reach 1/8" thickness. During pre-trip inspections, check for uneven pad wear, which often indicates caliper or suspension issues that need addressing before installing new parts.