TeraFlex 4.5" Coil Spring Base Lift Kit, No Shocks (4-Door) for 2018-2026 Jeep Wrangler

The 4.5" Coil Spring Base Lift Kit, No Shocks (4-Door) lifts the Jeep on taller TeraFlex coil springs for more ground clearance and room for bigger tires. It is a solid foundation to build on with TeraFlex control arms, track bars and shocks. Part number 1402400, 1402420 and 1402440 fits the 2018-2026 Jeep Wrangler.

Not Included:

Shocks are not included unless the title names them, and control arms, track bars, wheels, tires and the alignment after installation are not included.

Features

Taller TeraFlex coil springs
TeraFlex coils replace the factory springs to raise ride height and create room for larger tires.

Matched to weight and engine
Kits are specified by door count and, where it matters, engine, so the spring rate suits the weight on each axle.

Bump stops sized for bigger tires
Bump stop spacers included with the kits limit upward travel to protect fenders and tires, with guidance for each tire size.

Foundation for a complete build
Base kits carry the essential lift parts and pair with TeraFlex control arms, track bars and shocks as the build grows.

Works with TeraFlex shock options
TeraFlex recommends its Falcon and 9550 VSS shocks with these springs, and several kits come packaged with 9550 shocks.

Fitment & Compatibility

Specifications

• Brand: TeraFlex
• Lift height: 4.5"
• Doors: 4-door
• Shocks included: No
• Country of origin: USA
• Part numbers: 1402400 (3.6L / 2.0L); 1402420 (3.0L Diesel); 1402440 (4xe)

Installation

Type: Coil spring base lift  ·  Install: Springs, bump stops and brackets; longer shocks required  ·  Afterward: Alignment required

Read every TeraFlex sheet linked for this kit before starting, and confirm any control arm, track bar or shock parts the kit requires. A certified mechanic is recommended. Plan on an alignment and a headlight aim check once the Jeep is back on the ground.

Covers the JL rear track bar axle bracket. TeraFlex states it needs at least a 2" bump stop spacer to keep the body from being damaged as the suspension cycles. Two 1/2" holes are drilled after marking the bracket position (a center punch and pilot hole are suggested). The lower track bar position is for 2.5"-3" lifts and the upper is for 4" lifts; it can be installed with the Jeep on the ground.
Tools named in the guide: Basic mechanics tool set, Factory service manual, Drill, 1/2" drill bits, Pilot drill bit, Center punch, Torque wrench
Torque: 95 ft-lb, Supplied M12 bracket bolts (16mm and 18mm); 150 ft-lb, Supplied M14 track bar bolt (18mm and 21mm)

Covers the front track bar axle bracket for 2.5"-3.5" lifts. The bracket is best installed with the tires on the ground; it is positioned on the axle, the front and rear holes are marked, and the bracket comes off so two 1/2" holes can be drilled before it bolts on with the supplied M12 hardware and flag nut.
Tools named in the guide: Metric sockets and open-end wrenches, Torque wrench, General mechanics tools, Drill with 1/2" bit, Factory service manual
Torque: 59 ft-lb, 18mm sway bar link bolt, factory hardware; 95 ft-lb, M12 bracket bolts (16mm bolt, 18mm nut); 150 ft-lb, Track bar to bracket, supplied hardware (18mm bolt, 21mm nut)

Covers the JL 4.5" spring lift: new front and rear springs and bump stop spacers go in, the brake line brackets on the lower control arms and the rear parking brake cable bracket are discarded, and the parking brake eyelets are held with locking pliers while the rear axle is lowered. TeraFlex states that some form of caster correction is required for the base spring lift, that a 37" tire on a Sport or Sahara may need additional bump stop spacers, and that a rear track bar bracket is recommended to keep the rear driveshaft from contacting the gas tank. Control arm bolts are torqued at ride height unless the arms have Alpine IR bushings.
Tools named in the guide: Metric sockets and open-end wrenches, Torque wrench, General mechanics tools, Factory service manual, Locking pliers (2)
Torque: 12 ft-lb, Front bump stop hardware; 25 ft-lb, Rear bump stop bracket bolts (8mm and 6mm hex); 66 ft-lb, Sway bar link nuts; 45 ft-lb, Rear sway bar link nuts; 103 ft-lb + 145°, Front lower control arm bolts; 37 ft-lb + 135°, Front upper control arm bolts (18mm); 74 ft-lb + 65°, Rear upper control arm bolts (21mm); 130 ft-lb, Lug nuts

TeraFlex's installation instructions for this part number are linked under Resources. Read them fully before starting.

Resources

• TeraFlex JL rear track bar bracket instructions (PDF), TeraFlex's step-by-step guide.
• TeraFlex front track bar bracket instructions, 2.5"-3.5" lift (PDF), TeraFlex's step-by-step guide.
• TeraFlex JL 4.5" spring lift instructions (PDF), TeraFlex's step-by-step guide.

Warranty, Shipping & Returns

Warranty. TeraFlex backs its products with a limited warranty against defects in materials and workmanship for the original purchaser, on the vehicle the part was first installed on. Coil springs, bump stops, track bars and the 9550 shocks included with some kits carry a lifetime warranty. If a covered part fails, TeraFlex will repair or replace it or refund the purchase price at its discretion. The warranty does not cover improper installation, missed maintenance, modifications, normal wear, finish wear or racing and competition use, and paint and powder coat finishes are covered for 90 days against defects only. Shipping. The carrier and ship method are set by the size and weight of the cartons when the order is placed; larger kits and axles ship by freight. Inspect on delivery. Inspect the carton and every part as soon as the delivery arrives, note any shipping damage with the carrier, and contact us right away so we can make it right.

Returns. Unused items in their original packaging can be returned within 30 days of delivery. If an item arrives damaged, defective or wrong, return shipping is on us. See our Returns & Refunds Policy, or email support@prestigetruck.com with any question.

About TeraFlex