Complete Mopar 4-Inch Suspension Lift Instructions and Parts List

Installing a Mopar 4-inch suspension lift kit transforms your Jeep Wrangler’s off-road capability while maintaining factory ride quality and drivability. This guide covers the parts you need and walks you through the installation process for JK (2007-2018) and JL (2018-2024) models.

Overview of the Mopar 4-Inch Lift

Mopar’s 4-inch lift is designed specifically for Jeep Wranglers, using components engineered to match the vehicle’s geometry. The kit includes high-clearance control arms, tuned coil springs, Fox shocks, and all necessary brackets. It provides 4 inches of lift without sacrificing on-road manners. Crucially, this lift is engineered to work with factory wheels (17-inch or larger) and tires up to 35 inches.

What’s Included

The Mopar 4-inch lift kit typically contains:

• Front and rear coil springs
• Front and rear Fox 2.0 monotube shocks
• Front and rear adjustable lower control arms
• Front sway bar links
• Rear track bar bracket
• Brake line bracket relocation kit
• Bump stop extensions
• Hardware and instructions

Note: The exact parts may vary slightly between JK and JL kits. Always verify your specific part number (e.g., 77072407AB for JK, 77072407AC for JL).

Parts List

Below is a detailed list of components you’ll need. Mopar includes most items, but some additional parts may be required depending on your Jeep’s setup.

Hardware Kit

• Grade 8 bolts, nuts, and washers
• Torque specifications: Fastener torque values are critical. Mopar provides a chart; tighten all bolts to factory specs using a torque wrench.
• Loctite (medium strength) for critical fasteners

Front Components

• Coil springs (left and right, color-coded)
• Fox shocks (front pair)
• Lower control arms (adjustable, with bushings)
• Sway bar links (extended, with poly bushings)
• Bump stop spacers
• Brake line bracket (relocates hose to prevent binding)

Rear Components

• Coil springs (left and right)
• Fox shocks (rear pair)
• Track bar bracket (relocates axle end for proper geometry)
• Sway bar links (extended)
• Bump stop pads
• ABS line bracket (if not already rerouted)

You may also need a longer front driveshaft if your Wrangler has a 4-speed automatic or you experience driveline vibration. Mopar recommends a Tom Wood’s or Adams driveshaft for lifted applications.

Installation Instructions

Before starting, park on a level surface, chock the wheels, and raise the vehicle on jack stands. The lift requires at least a 24-inch floor jack, jack stands, and basic hand tools (wrenches, sockets, torque wrench, pry bar). Expect 6-10 hours for a first-time installer with a helper.

Preparation and Safety

• Disconnect battery negative cable to prevent accidental airbag deployment or electrical shorts.
• Spray all bolts with penetrating oil the night before.
• Use jack stands rated for the vehicle’s weight. Never work under a vehicle supported only by a jack.
• Wear safety glasses and gloves.

Front Suspension

1. Remove front wheels and tires.
2. Support the front axle with a floor jack. Disconnect the stabilizer bar links.
3. Remove the lower shock bolt and then the upper shock nut. Slide the shock out.
4. Compress the coil spring using a spring compressor. Remove the factory spring carefully.
5. Install the new Mopar coil spring with the bump stop spacer. Ensure the spring seats properly.
6. Install the new Fox shock: upper nut first, then lower bolt. Torque to spec (typically 55 ft-lbs).
7. Remove the factory lower control arms. Install the new adjustable arms with the bushings oriented correctly. Leave bolts loose until final alignment.
8. Attach the extended sway bar links. Torque to spec (around 50 ft-lbs).
9. Install the brake line relocation bracket. Route the line without kinking. Secure with supplied clip.
10. Repeat for the other side.

Rear Suspension

1. Remove rear wheels. Support the rear axle with a floor jack.
2. Disconnect sway bar links and the track bar (at the axle end).
3. Remove lower shock bolts and upper shock nuts. Remove shocks.
4. Use spring compressor to remove rear coil springs. Note the orientation: factory springs may have a tag indicating left or right.
5. Install new rear coils with bump stop pads. Seat them fully.
6. Install Fox rear shocks: upper first, then lower. Torque to 55 ft-lbs.
7. Install the track bar bracket: it mounts to the axle side. Use the supplied bolts. Torque to spec (80 ft-lbs). Reattach the track bar to the bracket.
8. Attach extended sway bar links. Torque to 50 ft-lbs.
9. For JL models, you may need to reroute the ABS sensor line. Use the provided zip tie to prevent contact with the tire.

Brake Line and ABS Extensions

• Double-check brake lines at full droop. If they’re tight, add a bracket or zip-tie to create slack.
• ABS lines should not be stretched; reroute behind the brake line bracket.

Driveline Considerations

• After the lift, the factory front driveshaft length may be marginal. If you hear clunking or feel vibration, install a longer shaft.
• The rear driveshaft angle changes; check pinion angle. Adjustable control arms allow correction. Aim for 1-2 degrees downward on the pinion relative to the driveshaft.

Final Checks and Alignment

1. Reinstall wheels and torque lug nuts to 100 ft-lbs.
2. Lower the vehicle to the ground.
3. With the vehicle on the ground, bounce the suspension to settle it.
4. Tighten all control arm bolts, sway bar links, and track bar hardware to final torque. This prevents bushing binding.
5. Check steering wheel centering. If off, adjust the drag link on the tie rod.
6. Get a professional alignment: set camber, caster, and toe to Mopar’s lifted specifications (typically +4 to +5 degrees caster, 0.1–0.2° toe-in).
7. Road test: check for vibration, pulling, noise. If vibration persists, check driveshaft angle or balance.

Recommendation

The Mopar 4-inch lift is a complete system that works best when installed as described. For most JK and JL owners, this kit delivers excellent off-road capability without sacrificing daily comfort. If you plan to run 35-inch tires, this lift is ideal. If you intend to go larger than 35s or do heavy rock crawling, consider additional upgrades like a front differential guard, skid plates, and a regear. Stick with Mopar components to maintain warranty and driveline quality. Always torque fasteners to spec and get a proper alignment for safe handling.