Peterbilt 379 Rear Fenders
Direct-Fit Rear Fenders for Peterbilt 379 Axle Setups
Keep your rear axles protected and compliant with heavy-duty replacement fenders engineered specifically for the Peterbilt 379 chassis. Whether you are running a standard leaf spring setup or a Low Air Leaf suspension, our inventory provides an exact-fit solution to shield your rig from road debris, rocks, and corrosive spray. Explore OEM-alternative commercial truck fenders built for long-haul durability. Choose from lightweight fiberglass, impact-resistant poly, or mirror-finish 304 stainless steel to match your fleet's aesthetic and operational demands.Half, Quarter, and Full-Radius Configurations
Upgrade your truck's appearance and safety with styles tailored to your specific wheelbase and clearance requirements:- Quarter Fenders: Ideal for weight-conscious fleets needing standard DOT compliance and fifth-wheel clearance.
- Peterbilt Half Fenders: Extended coverage that protects the front drive axle while maintaining a classic profile.
- Peterbilt Full-Radius Fenders: Maximum debris control and a premium, custom-show finish for standard and stretched wheelbases.
Frequently Asked Questions About Peterbilt 379 Rear Fenders
What's the difference between fiberglass and aluminum rear fenders for my Peterbilt 379?
Fiberglass fenders are lighter weight and more affordable, typically costing 40-60% less than aluminum. They're easier to repair if damaged but may crack under extreme stress. Aluminum fenders are more durable, resist cracking better, and maintain their shape longer, but they're heavier and cost more upfront. Most owner-operators choose fiberglass for cost savings, while fleet operators often prefer aluminum for longevity.
Will these rear fenders fit my specific year Peterbilt 379?
Our rear fenders fit all Peterbilt 379 models from 1987 to 2007. The mounting holes and dimensions are identical across all production years. However, if your truck has aftermarket modifications like custom brackets or non-standard wheelbases, you may need additional hardware. Extended hood models (379X) use the same rear fenders as standard 379s.
Can I install these rear fenders myself, or do I need a professional?
Most customers successfully install rear fenders themselves with basic tools and 2-3 hours per side. You'll need a socket set, drill with metal bits, and ideally a helper to hold the fender in place. The main challenges are aligning the mounting holes and supporting the fender weight during installation. Many customers recommend using jack stands to support the fender while securing bolts.
Do you offer rear fenders with built-in mudflap hangers?
Yes, we stock both styles. Fenders with integrated mudflap hangers save installation time and provide a cleaner look. Fenders without hangers allow you to use aftermarket anti-sail mudflap brackets or custom mounting solutions. Both styles are available in standard widths (typically 24" or 30") and various finishes including primer, painted black, and polished aluminum.
How do I prevent rust and corrosion on steel mounting brackets?
Steel brackets should be treated before installation, even if they come primed. Apply a rust-preventive coating like POR-15 or similar product to all steel surfaces, especially where brackets contact the frame. Many drivers also spray the inside of fender mounting areas with undercoating. For trucks operating in salt states, inspect and recoat brackets annually to maintain protection.
