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SKU: 4120
Synergy HD Knurled Front Ball Joint Set Dana 30/44 Jeep TJ/LJ/XJ/YJ/ZJ
This Synergy HD Knurled Front Ball Joint Set upgrades steering knuckles on Jeep models with Dana 30 or Dana 44 front axles. The kit includes two upper and two lower ball joints designed for TJ LJ XJ YJ ZJ. Knurled studs lock securely to resist rotation while grease fittings allow maintenance for long-term reliability in off-road use.
Key Features
- Knurled Studs – Grip steering knuckles to prevent spinning under load
- Heavy Duty Size – 1.25 inch OD uppers 1.625 inch OD lowers exceed OEM dimensions
- Greaseable Zerks – Fittings on both uppers and lowers for easy servicing
- Full Contact Design – Precision machined for smooth articulation and fit
- 30mm Ball Studs – Uppers feature high-strength studs for demanding conditions
- USA Made Steel – Robust construction tested for off-road durability
Specifications
| Detail | Value |
|---|---|
| Brand | Synergy Manufacturing |
| Type | HD Knurled Front Ball Joint Set |
| Compatibility | Jeep TJ/LJ/XJ/YJ/ZJ Dana 30/44 Front Axles |
| Part Number | 4120 |
| Weight | 4.60 lbs |
| Shipping Dimensions | 8.00 x 6.00 x 3.00 inches |
| Country of Origin | USA |
| Warranty | Limited Lifetime |
Whats Included
- 2 HD Upper Front Ball Joints
- 2 HD Lower Front Ball Joints
Product Notes
- Requires pressing out OEM joints and hammering knurled studs into C's for retention
- Compatible with stock height and lifts up to 4 inches
- Grease zerks installed on all joints no additional fittings needed
This Part Fits
| Year Range | Make | Model | Notes |
|---|---|---|---|
| 1987-1995 | Jeep | Wrangler YJ | Dana 30/44 Front |
| 1984-2001 | Jeep | Cherokee XJ | Dana 30 Front |
| 1993-1998 | Jeep | Grand Cherokee ZJ | Dana 30 Front |
| 1997-2006 | Jeep | Wrangler TJ | Dana 30/44 Front |
| 2004-2006 | Jeep | Wrangler Unlimited LJ | Dana 30/44 Front |
Why Choose Synergy?
- Engineered for rock crawling and trail durability
- Proven in competition and daily off-road driving
- Precision manufacturing in USA facilities
- Direct replacement with enhanced strength
Frequently Asked Questions
- Q: Does this set fit Dana 44 axles on TJ models?
- A: Yes fits both Dana 30 and Dana 44 front axles on listed Jeeps
- Q: Are installation tools required?
- A: Ball joint press recommended for removal and install
- Q: Can I grease these on the vehicle?
- A: Yes zerk fittings allow field greasing without disassembly
Shipping & Handling
- Method: UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Sturdy box 8 x 6 x 3 inches 4.60 lbs
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Synergy Mfg
Synergy Mfg, we pride ourselves on being industry innovators in the realm of high-end automotive performance components. Since 2005, our focus has been on manufacturing premium parts specifically designed for the off-road aftermarket. Our product line includes: High-quality suspension systems Heavy-duty steering components Axle upgrades Other related products that enhance vehicle capability, performance, and aesthetics Why Choose Synergy Mfg? Our products are designed by REAL engineers with over a decade of experience in off-road suspension design. Utilizing the latest CAD software, we ensure that our components achieve the highest levels of fit, finish, and performance. Here’s what sets us apart: All systems are developed with a synergistic approach, maximizing performance beyond the sum of individual parts. Components have undergone extensive design, engineering, and testing in challenging environments like: The Hammer Trails in Johnson Valley, CA Rubicon and Fordyce Trails ...
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