How to Build Homemade Suspension Parts for a Jeep Wrangler

Building your own Jeep Wrangler suspension parts can be a rewarding way to save money and get exactly the setup you want. While commercial kits are convenient, DIY fabrication allows for custom lengths, bushing choices, and mounting locations. This guide covers the basics of how to build homemade suspension parts for a Jeep Wrangler, including tools, materials, and step-by-step instructions for common components.

Understanding Your Jeep Wrangler Suspension

Before you start cutting and welding, you need to know the suspension layout of your Wrangler. Both TJ and JK models use a five-link suspension with two lower control arms, two upper control arms, and a track bar (or panhard rod) to center the axle. The coil springs and shock absorbers handle ride quality and damping. Building your own parts means you can adjust length, angle, and strength for your specific lift height and off-road use.

Key Components and Their Functions

• Control Arms: Connect the axle to the frame. They control axle position and pinion angle. Adjustable arms let you dial in alignment.
• Track Bar: Prevents lateral axle movement. A longer track bar is needed for lifted Wranglers to keep the axle centered.
• Spring Spacers: Simple pucks that raise the coil springs for a budget lift.
• Shock Mounts: Relocate shock attachment points to clear larger tires or longer shocks.

When DIY Makes Sense

Building your own parts is most practical if you have welding skills and access to a metal bandsaw, drill press, and tubing bender. It’s ideal for custom builds, one-off projects, or when you need a non-standard length. If you’re just doing a simple 2-inch lift, buying a kit might be faster. For a long-arm conversion or very tall lift, custom fabrication can offer better geometry.

Tools and Materials Needed

Essential Tools

• MIG welder (140-180 amp minimum, capable of welding 3/16" steel)
• Angle grinder with cutoff and grinding wheels
• Drill press or heavy-duty hand drill with step bits
• Tape measure and protractor
• Tube bender (manual or hydraulic) for control arms
• Welding table or sturdy workbench
• Safety gear: welding helmet, gloves, eye protection

Choosing the Right Steel and Hardware

• Tubing: For control arms, use 1.75" OD x 0.25” wall DOM steel. For track bars, 1.25” OD x 0.25” wall is common.
• Plate steel: 3/16" or 1/4" for brackets and mounts.
• Bushings: Polyurethane or rubber bushings with a 1/2" or 5/8" inner hole. You can buy universal bushing kits.
• Hardware: Grade 8 bolts, lock nuts, and washers. Use 9/16" bolts for most mounts.

Step-by-Step Guide to Building Homemade Components

Building Adjustable Control Arms

1. Determine length: Measure your current control arms or use frame and axle mounting points. For a lifted Jeep, you often need arms that are 1-2 inches longer than stock.
2. Cut tubing: Use a bandsaw or chop saw to cut your DOM tube to desired length, leaving a little extra for welding the ends.
3. Fabricate ends: Cut plate steel into rectangles for the mounting eyes. Drill a hole the size of your bushing inner sleeve. Weld these to the ends of the tube, ensuring they are square.
4. Add adjuster: If you want adjustability, cut the tube in half and weld in a threaded bung and a hex adjuster sleeve. This allows you to turn one end to lengthen or shorten.
5. Weld carefully: Weld all joints with 0.035” wire and 75/25 gas. Multiple passes are better than one big bead. Let cool slowly to avoid warping.
6. Install bushings: Press in the bushings and grease fittings if desired.

Fabricating a Track Bar

1. Measure for length: With the Jeep on the ground, measure from axle mount to frame mount. For a lifted Jeep, the track bar should be about the same as the original but with adjustable ends.
2. Cut tubing: Use 1.25" OD DOM tube. Cut two pieces: one for the main bar, one for the threaded adjuster sleeve.
3. Make brackets: Weld a plate with a bushing hole to one end of the main bar. On the other end, weld a threaded bung for a heim joint or a jam nut.
4. Assemble: Use a 3/4" heim joint with a misalignment spacer. Install on the frame side. The axle end gets the bushing.
5. Check clearance: Rotate the steering lock to lock and ensure the track bar doesn't hit the differential or oil pan.

Making Coil Spring Spacers

1. Choose material: Use high-density polyethylene (HDPE) or polyurethane pucks. Steel spacers are also possible but need to be powder coated to prevent rust.
2. Cut to size: For a 2-inch lift, cut a 2-inch thick puck that matches the spring diameter. Use a hole saw for the center hole.
3. Install: Place the spacer between the coil spring and the spring perch. Secure with zip ties temporarily until the Jeep is lowered.

Building Shock Mounts

1. Identify relocation points: If you install longer shocks, you may need to move the upper shock mounts down on the frame or use shock towers.
2. Fabricate brackets: Cut and drill plate steel to align with the shock eyelet. Weld them to the frame or axle tube.
3. Use a shock stud: For the mount, weld a 1/2" stud or use a bolt with a nut welded on the back.
4. Test articulation: Install the shocks and cycle the suspension fully without the springs to ensure no binding.

Safety and Testing Considerations

Weld Quality and Inspection

Poor welds can fail off-road, causing accidents. Practice on scrap steel before welding on actual parts. Grind welds to inspect for pores or cracks. If in doubt, have a certified welder inspect your work. Use only DOM steel for suspension components—seamless tubing is stronger and safer.

Off-Road Testing and Adjustment

After installation, check all bolts to torque spec (most are 80-100 ft-lb). Drive on pavement first to check for wobbles or vibrations. Then test at low speeds on a dirt road. Listen for clunks that indicate loose hardware or binding. Adjust control arm lengths to correct pinion angle and caster. A good starting point is to set the arms so the pinion points at the transfer case output.

Final Recommendation

Building homemade suspension parts for a Jeep Wrangler is a real option for experienced DIYers with welding skills. Start with simpler items like coil spring spacers or shock mounts to build confidence. Then move to adjustable control arms and track bars. Remember that safety is critical—use high-quality materials, double-check measurements, and test thoroughly. If you lack proper tools or skills, buying a proven kit is safer. But for those who want a custom setup and are willing to learn, fabricating your own suspension can be both satisfying and cost-effective.