maXpeedingrods 4" Suspension Lift Kit User Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of your maXpeedingrods 4" Suspension Lift Kit. This kit is designed to increase the ground and tire clearance of your vehicle, allowing for the fitment of larger custom rims and tires, and enhancing the vehicle's appearance while maintaining a smooth ride quality.

Please read this manual thoroughly before beginning installation to ensure proper procedure and safety.

2. Safety Information

Always prioritize safety during installation and operation. Professional installation is recommended. If you are not confident in your mechanical abilities, seek assistance from a qualified technician.

• Ensure the vehicle is securely supported on jack stands or a lift before working underneath.
• Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
• Do not modify any components of the lift kit.
• Verify all fasteners are tightened to manufacturer specifications.
• After installation, perform a thorough inspection of all suspension and steering components.
• A professional alignment is required after installation.

3. Vehicle Fitment

This 4" Suspension Lift Kit is specifically designed for the following Jeep Wrangler JK Unlimited models:

Important Notes:

• For 2012-2018 models, exhaust modifications may be necessary for front driveshaft clearance.
• Stock wheels require 1.5” wheel spacers for proper fitment.
• Automatic transmission vehicles may require a smaller diameter aftermarket front driveshaft.
• A Pitman arm is not included with this kit.

Figure 3.1: Compatibility table for Jeep Wrangler JK Unlimited models.

4. Parts List

Before beginning installation, verify that all components listed below are present in your kit. If any parts are missing or damaged, please contact maXpeedingrods customer support.

• Lift Springs (4)
• Shocks (4)
• Track Bar Drop Bracket (1)
• Brake Line Relocation Brackets (2)
• Shock Relocation Brackets (2)
• Coil Correction Plates (2)
• Necessary Hardware (bolts, nuts, washers, bushings)

Figure 4.1: Overview of all included components in the lift kit.

Figure 4.2: Detailed view of the kit contents, including springs, shocks, brackets, and hardware.

5. Setup and Installation

This section outlines the general steps for installing the 4" Suspension Lift Kit. Specific torque specifications and detailed step-by-step instructions for each component should be followed from the included printed instructions or a professional service manual for your vehicle.

5.1. Pre-Installation Checklist

• Gather all necessary tools (e.g., wrenches, sockets, torque wrench, jack, jack stands).
• Ensure the vehicle is on a flat, level surface.
• Disconnect the negative terminal of the vehicle's battery.
• Review the entire installation process before starting.

5.2. General Installation Steps (Overview)

1. Safely lift the vehicle and support it using jack stands. Remove wheels.
2. Disassemble existing suspension components (shocks, springs, sway bar links, etc.) as required.
3. Install new lift springs and shocks. The premium shocks are designed for both on-road and off-road performance, featuring high-pressure nitrogen gas and natural rubber bushings for vibration reduction. They are powder-coated for corrosion resistance.
4. Install track bar drop bracket, brake line relocation brackets, and shock relocation brackets.
5. Install coil correction plates.
6. Reassemble all other necessary components, ensuring proper routing of brake lines and wiring.
7. Tighten all fasteners to the vehicle manufacturer's specified torque values.
8. Reinstall wheels and lower the vehicle.
9. Perform a final inspection of all installed components.

Figure 5.1: Detail of the premium shock absorber, featuring a powder-coated surface for anti-corrosion and rubber bushings for vibration reduction.

Figure 5.2: Internal structure of the twin-tube shock, detailing its 18mm chromed hardened piston rod, 32mm diameter sintered iron piston, 50mm shock body, and high-pressure nitrogen charging.

6. Operation and Post-Installation

After the lift kit is installed, it is crucial to perform certain checks and adjustments to ensure safe and optimal vehicle operation.

6.1. Post-Installation Checks

• Alignment: A professional wheel alignment is mandatory immediately after installation to correct camber, caster, and toe angles. Failure to do so can result in premature tire wear and unsafe handling.
• Fastener Torque: Re-check the torque on all fasteners after the first 50-100 miles of driving, and periodically thereafter.
• Brake Line Clearance: Ensure all brake lines and ABS wires have adequate slack and are not pinched or stretched at full suspension droop or compression.
• Driveshaft Clearance: Verify sufficient clearance for the front driveshaft, especially on 2012-2018 models, where exhaust modifications might be needed.

6.2. Driving with a Lift Kit

A lifted vehicle will have a higher center of gravity. Drive cautiously and be aware of changes in handling characteristics, especially during cornering and braking. The 4" lift increases ground and tire clearance, allowing for larger tires (e.g., 35x12.50 R17 with 4.5”-4.75” backspacing) and improved off-road capability.

Figure 6.1: Visual comparison of a vehicle before and after the 4" front and rear lift, demonstrating increased clearance.

Figure 6.2: Benefits of the 4" lift, including increased ground clearance and improved tire fitment.

7. Maintenance

Regular inspection and maintenance are essential to ensure the longevity and safe operation of your maXpeedingrods suspension lift kit.

• Periodic Inspection: Regularly inspect all components of the lift kit for signs of wear, damage, or corrosion. Pay close attention to bushings, bolts, and welds.
• Fastener Checks: Re-torque all suspension fasteners at regular intervals, especially after off-road use. Loose fasteners can lead to premature wear and unsafe conditions.
• Cleaning: Keep the suspension components clean, especially after driving in mud, sand, or corrosive environments. Rinse off dirt and debris to prevent buildup and corrosion.
• Shock Absorbers: While the shocks are powder-coated for corrosion resistance, inspect them for any signs of leaks or damage. Replace if necessary.

8. Troubleshooting

This section provides solutions to common issues that may arise after installing a suspension lift kit. For complex problems, consult a professional mechanic.

9. Specifications

Figure 9.1: Components are constructed from high-strength carbon steel with an anti-corrosion surface.

10. Warranty and Support

maXpeedingrods stands behind the quality of its products.

• Limited Warranty: This product comes with a 1-year limited warranty covering quality-related issues from the date of purchase.
• Technical Support: maXpeedingrods offers lifetime technical support for this product.
• Contact: For any questions, technical assistance, or warranty claims, please contact maXpeedingrods customer support. Refer to your purchase documentation for specific contact details.