Skyjacker Suspension TJ40RR1LTK 4 Inch Rock Ready Long Arm Lift Kit with Dual Rate Coils

The Skyjacker TJ40RR1LTK is a complete 4-inch long arm suspension lift kit featuring dual rate long travel coil springs, lower flex links, pitman arm, front track bar, brake lines, bump stop spacers, sway bar end links, and rear track bar bracket. This Rock Ready 1 Series system represents a comprehensive suspension upgrade engineered specifically for enhanced off-road performance and highway comfort.

Advanced Dual Rate Coil Technology:

Skyjacker engineered a 2-stage dual rate long travel coil with spring rate progression from a first Flex Rate to a second Ride Rate. The first Flex Rate stage delivers a comfortable ride with the ability to flex and expand during full articulation as the suspension drops, while the second Ride Rate stage only engages after compression past Flex Rate, resulting in a smoother ride. This design keeps the coil springs seated in the upper coil mount and the tires in contact with the terrain.

Long Arm System Benefits:

• Delivers more articulation, more flex, more travel, and more affordable off-road performance
• Superior ride quality and handling on highways while being untouchable on trails
• Re-engineered suspension geometry via an integrated bolt-on sub-frame assembly that corrects proper driveline angle while retaining maximum ground clearance
• Upper frame mounts feature pressed-in HD OEM style vulcanized rubber bushings, while axle mounts use Rock Jock's 2.5-inch forged Johnny Joints that provide over 30 degrees of unrestricted flex movement in any direction

What's Included:

• Front and rear dual rate long travel coil springs
• Bent high-clearance lower adjustable flex links
• Front track bar and rear track bar bracket
• Pitman arm for proper steering geometry
• Extended brake lines
• Bump stop spacers
• Sway bar end links
• Complete Grade 8 mounting hardware
• Detailed installation instructions

This system provides the foundation for running larger tires while maintaining proper suspension geometry and driveline angles. The comprehensive component package ensures a complete, bolt-on installation with all necessary hardware included for professional results.