Frequently Asked Questions About Kenworth T300-T450 Disc Brake Parts

Will these disc brake parts fit my specific Kenworth T300, T400, or T450 model year?

Our disc brake parts are designed to fit Kenworth T300, T400, and T450 models typically ranging from 1997 to 2010. However, brake configurations can vary based on your truck's specific build specifications, GVWR, and whether it has air or hydraulic brakes. We recommend checking your VIN or contacting our parts specialists with your truck's model year and VIN to ensure proper fitment. Most parts will indicate compatible model years in the product description.

What's the difference between OEM and aftermarket brake rotors, and which should I choose?

OEM rotors are manufactured to exact factory specifications and typically cost 30-50% more than aftermarket options. Quality aftermarket rotors from brands like Gunite, Webb, and Accuride meet or exceed OEM standards and often feature improved metallurgy for better heat dissipation and longer life. For daily commercial use, premium aftermarket rotors provide excellent value. Choose OEM if you require exact factory specifications for warranty purposes or fleet standardization.

Do I need special tools to replace disc brake pads and rotors on my T300-T450?

Yes, you'll need several specialized tools including a brake caliper piston compressor, torque wrench capable of 450-500 ft-lbs for wheel bearings, and proper jack stands rated for commercial vehicles. Air brake systems require caging bolts for spring brakes and proper lockout procedures. Many technicians also recommend a dial indicator to check rotor runout. If you lack these tools or experience, professional installation is strongly recommended for safety reasons.

How do I know when my brake rotors need replacement versus resurfacing?

Check your rotor thickness against the minimum specification stamped on the rotor (typically around 1.5 inches for these models). If the rotor is within 0.060 inches of the minimum thickness, replacement is recommended. Also replace if you notice heat cracks extending more than 75% across the friction surface, deep scoring over 0.060 inches, or excessive blue discoloration from overheating. Most T300-T450 rotors can be resurfaced once or twice if they're thick enough and show only minor wear.

Are ceramic brake pads worth the extra cost for my Kenworth medium-duty truck?

Ceramic pads typically cost 20-40% more but offer significant advantages for certain applications. They produce less dust, operate quieter, and maintain more consistent performance across temperature ranges. However, for heavy-duty commercial use with frequent stops or heavy loads, semi-metallic pads often provide better initial bite and heat dissipation. Ceramic pads work best for highway driving and lighter-duty applications. Consider your typical routes and loads when choosing pad material.