Upgrade your Dodge Ram 3500’s rear suspension with the RAS HD Suspension Kit—designed for 2003–2024 models to enhance towing, hauling, and daily driving performance. This bolt-on RoadActive Suspension system strengthens rear leaf springs, reduces rear-end squat, sway, and bounce, and improves stability and handling for a smoother, more controlled ride under load or unloaded.
Unlike air bag systems, RAS is fully mechanical and maintenance-free—no compressors, air lines, leaks, or constant adjustments required. Each kit includes heavy-duty helper springs for the rear leaf springs to provide progressive load support without sacrificing ride quality. Installation is easy, typically taking 1–3 hours depending on your truck, with all parts fully assembled and ready to bolt on.
Key Features:
• Fits 2003–2024 Dodge Ram 3500 trucks
• Strengthens rear leaf springs for improved load handling
• Reduces rear-end squat, sway, bounce, and axle wrap
• Progressive support under load while maintaining smooth unloaded ride
• Maintenance-free design—no compressors, air lines, or adjustments
• Fully assembled for quick, bolt-on installation (1–3 hours)
• Includes RAS Heavy Duty Spring for each rear leaf spring
• Proven RoadActive Suspension performance since 1998
Before You Order
Verify part number 3613-THD exactly Match the listed product details to the part you are replacing before ordering. Compare dimensions, specifications and fitment information with your RV or component.
Frequently Asked Questions
What part number should I verify before ordering?
Verify 3613-THD on your existing part, documentation or equipment label before ordering.
How should I confirm this part fits?
Compare the listed part number, dimensions, specifications and fitment details with your existing component. Do not rely on appearance alone.
