Spicer Greasable Front Upper & Lower Ball Joint Kit for 1999-2004 Jeep Grand Cherokee WJ & Wrangler JK (Dana Super 30 / 44, Single Side)

Eliminate loose steering wheel play, cure aggressive front-end "death wobble," and restore factory-smooth tracking to your rig with this genuine Spicer Front Upper & Lower Ball Joint Kit. Specially engineered to handle the distinct front suspension geometries of 1999–2004 Jeep Grand Cherokee WJ models and 2007–2018 Jeep Wrangler JK/JKU platforms, this heavy-duty, single-side service package bundles both the upper and lower press-in ball joints into one convenient overhaul set.

On solid-axle Jeep 4WD platforms, the upper and lower ball joints function as the main structural pivot points for the front steering knuckles. Upgrading to larger off-road mud tires, heavy steel bumpers, or suspension lifts puts massive extra leverage and stress on these components. Over high mileage, the factory-installed plastic internal liners naturally compress and wear down. Once the internal socket gains slop, it triggers wandering steering tracking on the highway, uneven front tire wear, and harsh metallic clunking or popping noises when turning over trail obstacles.

Unlike sealed, non-serviceable factory alternatives, this original equipment manufacturer (OEM) Spicer design is fully greasable. It features an integrated grease zerk fitting on the socket housing, allowing you to regularly pump in fresh lubricant to flush out water, trail silt, and abrasive road grime. Precision-ground from case-hardened alloy steel, choosing a genuine Spicer replacement ensures strict original equipment tolerances are met for long-lasting structural durability.

Kit Contents (Services One Side):

• (1) Premium Upper Ball Joint (Includes Hardware and Threaded Adjustment Sleeve)

• (1) Greasable Lower Ball Joint (Includes Castle Nut and Cotter Pin)

Kit Highlights:

• Complete Single Knuckle Set: Supplies 1 upper and 1 lower premium ball joint along with all required replacement locking nuts, pins, and specific threaded hardware to fully rebuild one wheel station.

• Greasable Design: Integrated grease zerk enables ongoing preventative maintenance, maximizing service life under muddy, wet, or extreme trail conditions.

• Genuine Spicer OEM Quality: Manufactured by Dana to original equipment specifications, providing vastly superior structural fatigue resistance compared to budget aftermarket alternatives.

• Cures Front End Slop: Restores zero-play structural rigidity to the steering knuckle, significantly reducing the risk of tracking vibration and front-end wandering.

Vehicle & Axle Fitment:

• Make: Jeep

• Grand Cherokee WJ: 1999, 2000, 2001, 2002, 2003, 2004 (All 4WD / AWD Models with Dana Super 30 Front Axles; Replaces OE Part: 5012432AA)

• Wrangler JK / Wrangler Unlimited JKU: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 (Fits Front Dana 30 and Front Dana 44 Axles)

• Position: Front Left or Right Steering Knuckle (Fits Either Side — 2 Kits Required per Vehicle)