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Engineered Flex For The Modern Wrangler Platform
The Skyjacker JL40BLTD 4 inch component box brings a progressive 2-stage dual rate long travel coil spring system to the 2020-2022 Jeep Wrangler JL Unlimited. The JL40BLTD transitions from a flex rate for comfortable articulation to a ride rate under compression, keeping the coils seated and the tires in contact with the terrain through full droop.
Key Features
- Progressive 2-stage dual rate long travel coil springs
- Flex rate stage improves articulation at full droop
- Adjustable front track bar with HD rod end and jam nut
- Rear track bar upper mount bracket for proper axle centering
- Front and rear bump stop spacers included
- Extended sway bar end links maintain ESC function
Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2020-2022 | Jeep | Wrangler | Unlimited Sahara |
| 2020-2022 | Jeep | Wrangler | Unlimited Sport |
Specifications
| Detail | Value |
|---|---|
| MPN | JL40BLTD |
| UPC | N/A |
| Lift Height | 4.0 Inch |
| Position | Front and Rear |
| Sold As | Kit |
| Warranty | Limited Lifetime |
What's Included
- Front and rear dual rate long travel coil springs
- Adjustable front track bar
- Rear track bar upper mount bracket
- Front and rear bump stop spacers
- Extended sway bar end links
About Skyjacker
Skyjacker Suspensions has engineered off-road and towing suspension products since 1970, building a reputation for durable lift kits and coil springs that hold up to real world use on and off the pavement.
Related Parts
What is the JL40BLTD?
The JL40BLTD is a Skyjacker 4 inch component box for 2020-2022 Jeep Wrangler JL Unlimited models, featuring dual rate long travel coil springs and correction brackets front and rear.
Does the JL40BLTD include shocks?
No, the JL40BLTD is a component box focused on springs, track bars, and brackets; shocks are sold separately.
Will the JL40BLTD affect my Electronic Stability Control?
No, the JL40BLTD maintains proper suspension geometry so the ESC system continues to function within factory parameters.
Does the JL40BLTD fit Rubicon models?
The JL40BLTD is engineered for Sahara and Sport trims; Rubicon applications require a different Skyjacker kit due to differing axle components.
What tire size does the JL40BLTD allow?
Most owners run 35 inch tires after installing the JL40BLTD with appropriate wheel backspacing.
What warranty comes with the JL40BLTD?
Skyjacker backs the JL40BLTD with a limited lifetime warranty against manufacturing defects.
Do the rear coils in the JL40BLTD matter which side they go on?
Yes, the rear coils in the JL40BLTD are side specific to match the Wrangler's suspension handling characteristics.
Does the JL40BLTD require an alignment after installation?
Yes, a front end alignment is recommended after installing the JL40BLTD to restore proper handling.
Install Instructions
- Raise and support the vehicle, then remove all four wheels.
- Remove factory front and rear coil springs, track bars, and sway bar end links.
- Install the JL40BLTD coil springs, adjustable front track bar, and rear track bar bracket.
- Install the bump stop spacers and extended sway bar end links.
- Reinstall wheels, torque hardware to spec, and perform a front end alignment.
Prop 65 Warning
This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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