Timbren FR350SDJ Rear Suspension Enhancement System for 17-26 Ford F-350 2WD/4WD

Vehicle Fitment

2017-2026 Ford F-350 Super Duty 2WD
2017-2026 Ford F-350 Super Duty 4WD

Fitment Notes

• Rear axle application
• Fits all cab configurations (Regular, SuperCab, Crew Cab)
• Fits all bed lengths
• Fits both single rear wheel (SRW) and dual rear wheel (DRW) models
• Mounts between truck chassis and rear axle
• Does NOT increase GVWR - do not exceed manufacturer ratings
• No drilling required - bolt-on installation

Features

• Patented Aeon hollow rubber spring construction
• Progressive spring rate - automatically stiffens as load increases
• Eliminates suspension squat under heavy loads
• Reduces sway and improves roll stability
• Cushions road shocks and absorbs impacts
• Comfortable ride whether loaded or unloaded
• Functions independently - handles uneven loads
• Heavy-duty powder-coated steel mounting brackets
• Zero post-installation maintenance required
• No air lines, fittings, or compressors needed
• DIY installation with basic hand tools
• Vehicle-specific design for optimal fit and performance
• ISO9001 certified manufacturing
• Lifetime warranty

Specifications

• Brand: Timbren
• Part Number: FR350SDJ
• UPC: 809933008660
• Type: Suspension Enhancement System (SES)
• Position: Rear
• Spring Type: Aeon Hollow Rubber
• Rated Capacity: 8,600 lbs
• Kit Height (without spacer): 7.25"
• Kit Height (with 1/2" spacer): 7.75"
• Bracket Finish: Black Powder Coat
• Installation: Bolt-On (No Drilling)
• Maintenance: None Required
• Country of Origin: Canada
• Warranty: Lifetime

Included Components

• (2) Patented Aeon SES hollow rubber springs
• (2) 1/2" rubber spacers
• (2) Heavy-duty powder-coated steel mounting brackets
• All necessary mounting hardware
• Installation instructions

Product Description

The Timbren FR350SDJ Rear Suspension Enhancement System provides up to 8,600 lbs of load support for 2017-2026 Ford F-350 Super Duty trucks. While the F-350 is a towing powerhouse, heavy payloads and trailers can still cause rear-end squat, sway, and instability. The Timbren SES mounts between the truck chassis and rear axle, working in conjunction with the factory suspension to eliminate these problems. The patented Aeon hollow rubber springs deliver a progressive spring rate that automatically stiffens as loads increase, providing a comfortable ride when unloaded and firm support under heavy loads. Unlike air bag systems, Timbren SES requires zero post-installation maintenance - no air lines, fittings, compressors, or adjustments. Each Aeon spring functions independently, automatically compensating for uneven weight distribution between left and right sides. The system cushions road shocks, reduces body roll, and helps level the vehicle while hauling or towing. Installation is a simple bolt-on process using basic hand tools with no drilling required. Ideal for RV towing, fifth-wheel hitches, gooseneck trailers, heavy payloads, and snow plow applications. Manufactured in Canada with ISO9001 certification and backed by Timbren's lifetime warranty against defects in material and workmanship.