Frequently Asked Questions About Peterbilt 330/335/337 Disc Brake Parts
Will these disc brake parts fit my specific Peterbilt 330, 335, or 337 model year?
Our disc brake parts are designed to fit Peterbilt 330, 335, and 337 models from 2005 to present. However, there are variations between model years, particularly in rotor diameter (12.75" vs 15" depending on GVWR) and caliper mounting configurations. We recommend checking your OEM or existing brake specifications before ordering. If you're unsure, our team can help verify compatibility - just provide your truck's year, model, and OEM number when contacting us.
What's the difference between OEM and aftermarket brake rotors and pads for these models?
OEM brake components meet Peterbilt's exact specifications and typically last 80,000-120,000 miles under normal conditions. Aftermarket options vary in quality - premium aftermarket brands like Bendix and Meritor often match OEM performance at 20-30% less cost. Budget aftermarket parts may save 40-50% but typically wear faster and may cause brake noise. We carry both OEM and trusted aftermarket brands, clearly labeled with expected lifespan and warranty coverage.
Can I replace just the brake pads, or should I replace rotors at the same time?
You can replace pads alone if your rotors measure above minimum thickness (typically 1.18" for 330/335 models, 1.42" for 337 models with heavier GVWR). However, installing new pads on worn rotors can reduce pad life by up to 50% and cause uneven braking. We recommend rotor replacement if they show heat checking, scoring deeper than 0.060", or are within 0.10" of minimum thickness. Most customers find replacing both together more cost-effective long-term.
What tools and experience level are needed to install these disc brake parts?
Basic disc brake replacement requires standard mechanics tools plus a few specifics: 3/4" and 13/16" sockets for caliper bolts, a C-clamp or brake piston tool, and torque wrench capable of 250 ft-lbs. The job typically takes 2-3 hours per axle for experienced mechanics. Critical steps include proper torque specifications (typically 165-185 ft-lbs for caliper mounting bolts) and brake bleeding if replacing calipers. We provide detailed torque specs with each part and recommend professional installation if you're not comfortable with air brake systems.
Why are there different brake pad materials available, and which should I choose?
Semi-metallic pads are standard for most applications, offering good all-around performance and 40,000-60,000 mile life. Ceramic pads run cooler and produce less dust, ideal for stop-and-go delivery routes, but cost 20-30% more. Severe-duty pads handle high heat better for mountain driving or heavy loads but wear rotors faster. For typical regional hauling with 330/335 models, semi-metallic works well. For 337 models doing heavy vocational work or steep grade operation, consider severe-duty compounds for better fade resistance.
