Heavy-Duty Brake Drum 3800AX | 16.5" x 8.625" Outboard Mount for Class 8 Trucks & Trailers

Product Overview

The 3800AX Brake Drum is a premium, full-cast braking component designed for heavy-duty commercial vehicles requiring maximum stopping power. Specifically engineered for 16.5" x 8.625" brake systems, the 3800AX is the industry standard for drive axles and heavy-capacity trailers where heat dissipation is critical.

Manufactured from high-carbon G3000 (GG25) grey iron, our 3800AX drum is built to withstand extreme thermal loads without cracking or warping. Its outboard mount design ensures ease of service, making it a favorite for fleet operators managing Freightliner, Kenworth, and Peterbilt trucks.

Technical Specifications

Vehicle Compatibility

The 3800AX Brake Drum is a direct fit for a wide range of North American Class 8 heavy-duty applications:

Truck Brands: Freightliner (Cascadia), Kenworth (T680/T800), Peterbilt (579/389), International, and Western Star.

Axle Manufacturers: Compatible with Meritor, Dana (Spicer), and Hendrickson heavy-duty axle systems.

Axle Position: Primarily used on Drive Axles and Heavy-Duty Trailer Axles.

Cross-Reference & Interchange

This product is a direct interchangeable replacement for the following reference numbers:

Gunite: 3800AX, 3800A, 3800

Webb: 68730, 68730B, 68730F

Meritor: 53-123565-002, 123565

Dayton: 123565 

Haldex: 3800AX

Fleetrite: FLT3800AX

Key Benefits

Maximum Heat Sink Capacity: The extra-wide friction surface and high-carbon metallurgy provide superior heat absorption, preventing "brake fade" during heavy hauling.

Precision Dynamic Balancing: Every 3800AX is balanced to strict tolerances (G16 grade) to eliminate wheel vibration and prevent premature wear on hub seals and tires.

Structural Stability: The reinforced mounting flange is designed to resist distortion under extreme torque, ensuring a consistent pedal feel and even lining wear.

Anti-Corrosion Finish: Treated with a specialized coating to resist road salt and environmental corrosion, maintaining structural integrity and ease of removal.

FAQ

Q: What is the difference between 3800AX and 3600AX?

A: The main difference is the width. The 3800AX is designed for an 8.625" brake shoe (Wide Brake), while the 3600AX is for a standard 7" shoe. They are not interchangeable.

Q: Can this drum be used on 23,000 lb axles?

A: Yes, the 3800AX is specifically engineered for high-capacity axles (23k and above) that require the wider braking surface for better thermal management.

Q: Is the 3800AX a "Full Cast" drum?

A: Yes, our 3800AX is a one-piece full cast iron drum, offering the best heat conductivity and structural rigidity for heavy-duty vocational and long-haul use.