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Johnny Joints: An Articulation Solution

The "Sportsman" Kit from Currie Enterprises

There's a lot you can do to improve an XJ's articulation. Certainly there are a number of lift kits, steering assemblies and other suspension-minded aftermarket goodies available that will all help to do that. Yet, there was one innovative approach we'd heard about that intrigued us so much we just had to find out more about it.

Currie Enterprises in Anaheim, California sells a turnkey kit designed to give the Jeep Cherokee much more articulation than it has as a stocker. The Currie kit, which has been dubbed the "Sportsman" because it converts a stock XJ into a brawny trail-ready rig, features a 4-inch lift kit that employs military-wrap leaf springs, coils, bumpstops and new upper and lower "Johnny Joint" control arms (see sidebar). The lower control arms are fully adjustable and they allow pinion-angle and caster to be adjusted as well. The beefy arms themselves are thick, rounded heavy-duty shafts made of 1 ¼-inch heavy-wall DOM tubing, are zinc-plated and come with zerk fittings and Grade 8 mounting bolts.

When purchased complete, the kit also replaces the Cherokee's puny stock steering linkage with a thicker drag link, tie rod and panhard bar. This is key, because while many lift kits may elevate the XJ, they rarely compensate for the increased angles and resultant stress placed on the stock steering linkage. Still, there's more to the kit. It also uses innovative bushings for the upper and lower control arms. Called Johnny Joints, these connectors give you the movement of spherical rod-ends while also offering the vibration-free ride of conventional polyurethane bushings.

Though it's not part of the Sportsman kit, Currie can improve upon the Cherokee even further with a tailshaft conversion kit for the NP231 transfer case, swapping out its slip-yoke and replacing it with a fixed yoke and CV joint. The conversion moves the point at which the rear driveshaft connects to the transfer case closer to the front of the vehicle. This allows for a longer driveshaft, improving ride-height angle and reducing much of the tension on the shaft at full load.

Once installed, the 4-inch lift cleared the way for a set of 31x10.50x15 tires and offered substantially improved ground clearance. But what really impressed us was the articulation the XJ achieved--a full 10 inches of upward travel.

  • After installing the Currie Sportsman kit, which includes a 4-inch lift and beefier steering components, this '93 XJ Cherokee achieved incredible articulation. Here, it beats up on a forklift. The stock profile of the XJ (right) leaves much to be desired in the way of clearance and articulation.
    After installing the Currie Sportsman kit, which includes a 4-inch lift and beefier steeri
  • The complete Sportsman kit from Currie Enterprises features a 4-inch lift kit, which uses military-wrap leaf springs, Johnny Joint-equipped upper and lower control arms, coils, bumpstop spacers and bump stops. In addition, the kit features heavy-duty steering components, including a new track bar, pitman arm, drag link and tie rod.
    The complete Sportsman kit from Currie Enterprises features a 4-inch lift kit, which uses
  • Installing the lift kit requires the removal of the front axle. Since weak lower control-arm brackets are a problem for XJs and TJs, Currie boxed these brackets. The brace strengthens the bracket and creates a ramped skidplate. First, we ground down the lower control-arm bracket on the axle. Once smooth, two steel plates (which can be purchased from Currie) were welded to the assembly.
    Installing the lift kit requires the removal of the front axle. Since weak lower control-a
  • The control arms come preassembled with the Johnny Joint bushings already in place and set to the stock length. Simply bolt the control arms to the proper brackets on the Cherokee chassis. After installation, apply a shot of grease to the bushings before you're ready to hit the trail.
    The control arms come preassembled with the Johnny Joint bushings already in place and set
  • Prepare the bumpstops on the Cherokee by sanding them down. Trim the upper bumpstop and use a rubber mallet to hammer the provided bumpstop cover onto the bumpstop mount. Meanwhile, trim, drill and tap a hole into the bumpstop on the axle. Secure the spacers and new bumpstop to the axle assembly. Reattach the axle to the chassis, install the coils and connect the upper and lower arms to the axle.
    Prepare the bumpstops on the Cherokee by sanding them down. Trim the upper bumpstop and us
  • Comparing the stock steering linkage to Currie's kit is a no-brainer. The Currie kit features a high-strength 1-inch-diameter, 0.188-inch-wall tie rod. These are constructed of 4130 chrome-alloy steel with TRW rod-ends and have urethane dust boots.
    Comparing the stock steering linkage to Currie's kit is a no-brainer. The Currie kit featu
  • Besides an obvious improvement in strength over stock parts, Currie's drag link corrects the geometry of the post-lift steering because the drag link connects to the pitman arm at proper ride height for a 4-inch lift. This reduces the load on the drag-link connector.
    Besides an obvious improvement in strength over stock parts, Currie's drag link corrects t
  • The Currie tailshaft conversion replaces the stock slip-yoke with a fixed yoke and CV joint or three universal joints. This allows for a longer rear driveshaft, thereby improving the driveshaft angle and reducing tension on the shaft. Although this kit can be installed with the transfer case still on the vehicle, it is recommended you remove the 'case for easier access.
    The Currie tailshaft conversion replaces the stock slip-yoke with a fixed yoke and CV join
  • The main ingredient in the tailshaft conversion is Currie's new mainshaft (top), which uses a double-row roller bearing (not shown) and bearing retainer that connects to a CV joint or three-joint driveshaft.
    The main ingredient in the tailshaft conversion is Currie's new mainshaft (top), which use
SOURCES
Currie Enterprises
7-14/-528-6957
www.currieenterprises.com
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