Synergy Heavy Duty Front Ball Joint Set 2 Upper/2 Lower for 2007-2018 Jeep Wrangler JK/JKU, 1999-2004 Grand Cherokee WJ

Description
Synergy Heavy Duty Front Ball Joint Set 2 Upper/2 Lower for 2007-2018 Jeep Wrangler JK/JKU, 1999-2004 Grand Cherokee WJ

Synergy Heavy Duty Front Ball Joint Kit (Non-Knurled | Complete Set)

Part: 8012-60

Factory Jeep ball joints wear rapidly when subjected to large tires, increased steering loads, and off-road articulation. The Synergy 8012-60 Heavy Duty Ball Joint Set replaces the stock failure-prone design with a metal on metal bearing, heat-treated chromoly stud, and increased bearing surface area. These joints are fully greaseable and engineered for long service life with no nylon liner to degrade over time. For any JK, JKU, or WJ running a mild lift or oversized tires, these are a reliability upgrade.

Features

• Metal-on-Metal Design: Eliminates nylon liner wear to maximize lifespan.
• Larger Bearing Surface: Reduces stress concentration and improves joint durability.
• Sintered Bronze Bearing Race: Provides smooth, stable articulation.
• 4140 Chromoly Stud: Induction heat treated for high bending and shear strength.
• 1045 Alloy Steel Housing: Maintains precision fitment under high loads.
• Greaseable: Allows proper lubrication for long service life in mud and abrasives.

Specifications

• Quantity: Full set (2 Upper + 2 Lower)
• Type: Non-knurled
• Bearing Race Material: Sintered graphite and oil-impregnated bronze
• Stud Material: 4140 chromoly, induction heat treated
• Housing Material: 1045 high-carbon steel

Fitment

• 1999-2004 Jeep Grand Cherokee WJ
• 2007-2018 Jeep Wrangler JK / JKU

What’s Included

• (2) Non-knurled upper ball joints
• (2) Non-knurled lower ball joints
• (4) Castle nuts
• (4) Cotter pins
• (4) 1/4″-20 UNF grease zerks

Installation Notes

• Metal-on-metal ball joints require a break-in period of 100-500 miles for bearing seating.
• During break-in, steering may feel slow to return to center; this normalizes after seating.
• These are non-knurled. Only use knurled variants to correct an oversized bore.

Recommended Grease: Synergy High Performance Grease

Why Choose This Product?

• Engineering Advantage: Large-diameter spherical bearing prevents point loading and wear under steering load.
• Performance Benefit: Maintains alignment, reduces wander, and improves steering precision with oversized tires.

Frequently Asked Questions

Are these rebuildable?
No, these are a sealed long-life metal-on-metal design. Adjustable rebuildable versions are available separately.

Should I choose knurled or non-knurled?
Use non-knurled unless the axle C is worn oversize. Knurled versions correct an oversized bore.

Will these work with aftermarket axle shafts like RCV?
Yes. They are compatible with all aftermarket shafts without modifications.

Do I need to re-grease these?
Yes. They are fully greaseable and should be serviced periodically based on use conditions.

Is there a rebuildable option available?
Yes. For fully adjustable joints, see the Synergy Adjustable Ball Joint Kit.