Built for the challenge.

The heavy-duty vocational frame underneath the 49X is engineered to stand up to the demands of severe service applications like construction, logging and heavy haul trucking while being lighter weight, more durable, easier to service and extremely Truck Equipment Manufacturer (TEM) friendly.

purpose built
  • Single-Channel Rails
    Not only does the 49X offer the industry’s first high-strength single-channel rail rated 3.8 million RBM without an insert, there’s also a new, stronger 9.5mm rail that delivers the same RBM rating as an 11mm while saving nearly 100 pounds.Single-Channel Rails
  • Splayed Frame Rails
    Splayed frame shape at the front of the chassis allows for lower engine and radiator packaging that optimizes hood slope for increased visibility and safety, as well as improved engine serviceability.Splayed Frame Rails
  • Full Parent Front Frame Rail Extension Options
    Multiple parent rail front frame extension options are available, eliminating the need for bolt-on extensions or reinforcements.Parent Rail Front Frame Extension
  • Easier Upfit
    Straight frame sections begin directly behind the cab and feature a constant flange-to-flange dimension, making upfit easier.Easier Upfit
  • Standard Aluminum Crossmembers
    Cast aluminum forward, rear suspension and end-of-frame crossmembers are standard for applications that demand greater weight savings.Bolted Crossmembers
  • Heavy-Duty Fasteners
    Phosphate-coated Class 10.9 fine-thread fasteners offer a high clamp load and don't require maintenance.Standard Fasteners
  • Front Tow Assembly Options
    A number of towing device options mounted directly to the front frame head for incredible strength, allowing you to pull your truck free without damage.Front Tow Assembly
  • Robust Routing and Clipping
    Frame rail stand-offs keep wiring and air lines separated and away from the chassis to reduce corrosion, debris damage and diagnosis time.Robust Routing and Clipping
Power Take Offs

From snowplows and mixers to bulk haul tractors and everything in between, the wide selection of options on the 49X lets you choose the right combination of front engine PTOs – FEPTO, REPTO and transmission-mounted PTOs – so you can install the equipment you need for your application.

Purpose Built Options
Bumpers The 49X offers three bumper styles in various finishes and thicknesses, as well as a boxed-in bumper with an optional grille guard for logging applications.
Front Tow Devices A number of towing device options mounted directly to the front frame head of the 49X for increased strength and durability with up to 140,000 lb tow capacity.
Tool Boxes Durable, lightweight aluminum tool boxes are available in 18-, 24-, and 34-inch widths. All are locking and can be ordered with plain, polished or diamond plate finish covers.
Tool Boxes
Battery Boxes Battery boxes in the 49X can be mounted between rails, inside the cab or on the frame. The frame-mounted boxes are also made from lightweight, corrosion-resistant aluminum for long life. A new two-battery option is available for additional weight savings.
Battery Boxes
Access Hatch Optional left-side access hatch available for easy check of key fluid levels without opening the hood or removing front-mounted equipment.
Access Hatch
Air Cleaner Options The optional pre-cleaner removes a majority of particles out of the air before entering the primary air cleaner, extending filter life and service intervals in off-road environments.
Air Cleaner Options
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