Synergy D30/D44 Heavy Duty Front Ball Joint Sets

Part #: 8009-12X
Weight: 4 lbs
  • MSRP: $100.00
Purchase through our Dealer Network.
Northridge4x4 4Wheel Drive Hardware 4 Wheel Parts QUADRATEC Morris 4x4 Center Extreme Terrain ORW - Off Road Warehouse CJC Offroad OC Motorsports

*Not all products available from each dealer. For a list of international dealers click here.

  • Weight
    4 lbs
  • SKU
  • Designed to replace the factory ball joints that are prone to premature wear on lifted vehicles with large off-road tires
  • Fully greasable metal on metal design
  • Machined bearing housing made from sintered graphite, bronze, and 1045 steel for a strong, smooth, bearing surface
  • Ball joint stud made from 4140 steel with an induction heat treated bearing surface for smooth operation and maximum life
  • Uses a larger stud than stock
  • Ball joint boot is made from tear/wear resistant silicone polyurethane
  • Completely eliminates the stock style nylon liner for improved performance and durability
  • Outperforms the factory ball joint assembly and includes all necessary hardware for installation
  • Single Set includes: (1) upper, (1) lower
  • Complete Set includes: 2 Single Sets
  • 12 Month Unlimited-Warranty (see warranty information)
  • Synergy High Performance Grease (4119) is the recommended grease for this product
Part #YearMakeModelNotesBall Joint Set
(1) Upper / (1) Lower
(2) Upper / (2) Lower
(1) Upper / (1) Lower
(2) Upper / (2) Lower
(1) Upper / (1) Lower
(2) Upper / (2) Lower
4120-041993-1998JeepGrand Cherokee (1) Upper / (1) Lower
41201993-1998JeepGrand Cherokee (2) Upper / (2) Lower
8009-12041999-2004JeepGrand Cherokee (1) Upper / (1) Lower
8009-121999-2004JeepGrand Cherokee (2) Upper / (2) Lower
(2) Upper / (2) Lower
(1) Upper / (1) Lower

Installation Instructions


  • Synergy HD Ball Joints are compatible with RCV axles
  • 8009-1201 has been superseded by 8009-1204
  • 4120-01 has been superseded by 4120-04

(Lower Ball Joint Cutaway Sample)

(Upper Ball Joint Cutaway Sample)

Synergy HD Ball Joints (above) vs. Mopar Factory Ball Joints (below)
Synergy HD Ball Joints feature a fully greasable sintered metal on bushing design that has high wear resistance. Outperforms the Mopar factory plastic bushing.

WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle.
For more information go to

Related products

Drop items here to shop
Product has been added to your cart