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Let the rear leaf eye travel farther during deep articulation
RockJock JS-9081 is built for Rear of 1984-2001 Jeep Cherokee XJ and 1986-1992 Jeep Comanche MJ models. Five-inch center-to-center shackles replace stock three-inch shackles; actual lift depends on the current shackle length and suspension geometry. Final compatibility depends on matching every dimension, mounting point, moving component, and clearance in the intended suspension system.
Key Features
- JS-9081 uses a heavy-duty fabricated boomerang shape
- Five-inch center-to-center length
- Direct bolt-on replacement for stock XJ and MJ shackles
- Greasable Dura-Thane bushings support quiet service
- Gold zinc finish protects the assemblies
Fitment
| Fitment Type | Verified Application | Required Checks |
|---|---|---|
| Dimension and system specific | Rear of 1984-2001 Jeep Cherokee XJ and 1986-1992 Jeep Comanche MJ models. Five-inch center-to-center shackles replace stock three-inch shackles; actual lift depends on the current shackle length and suspension geometry. | Confirm exact dimensions, mounting hardware, geometry, loads, articulation, component condition, and full suspension and steering clearance |
Specifications
| Detail | Value |
|---|---|
| Product Type | Leaf Spring Shackles |
| Manufacturer Part Number | JS-9081 |
| Position | Rear |
| Vehicle | Cherokee XJ and Comanche MJ |
| Length | 5 inches center to center |
| Stock Reference | 3 inches center to center |
| Bushings | Greasable Dura-Thane |
| Finish | Gold zinc |
What's Included
- Two complete JS-9081 boomerang shackle assemblies
About RockJock
RockJock develops connected Antirock sway bar systems, serviceable Johnny Joints, steering components, and suspension hardware for trail control and articulation. Its replacement and universal components are specified by exact dimensions so builders can preserve safe geometry and serviceability.
Related Parts
- XJ or MJ rear leaf springs
- Application-rated rear shackle bolts
- Non-synthetic chassis grease compatible with the bushings
FAQ
What is the JS-9081?It is the RockJock leaf spring shackles described in the Specifications table for the stated dimension-based application.
Which vehicles fit?The shackles fit all 1984-2001 Cherokee XJ and 1986-1992 Comanche MJ models.
How long are they?They measure five inches center to center.
How much lift will they provide?Lift depends on the current shackle length; RockJock suggests half the center-to-center length difference as a rough estimate.
Are the bushings greasable?Yes. Each shackle has a zerk fitting for the Dura-Thane bushings.
Do they bolt in?Yes. They directly replace stock rear shackles when the surrounding suspension is compatible.
Why use a boomerang shape?The shape lets the spring eye move farther around the rear structure during articulation.
Are both sides included?Yes. The package contains two complete assemblies.
Installation Instructions
- Verify the package label and manufacturer part number JS-9081 before removing, cutting, or installing components.
- Measure the current shackle center-to-center length and inspect spring-eye and body-side mounts.
- Support the vehicle and rear axle safely and unload the leaf springs.
- Remove one stock shackle at a time without allowing the spring or axle to shift unexpectedly.
- Lubricate and position the replacement assembly in the correct boomerang orientation.
- Install serviceable application-rated hardware and tighten it at the specified ride-height condition.
- Cycle the axle through compression and droop to verify body, spring, exhaust, tire, and brake-line clearance.
- Grease the bushings, recheck ride height and alignment, and inspect torque after initial use.
California Proposition 65 Warning: Cancer and reproductive harm. See www.P65Warnings.ca.gov.
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