Synergy Heavy Duty Ball Joint Kit Front (1 Upper/1 Lower) for 2018+ Jeep Wrangler JL/JLU and 2020+ Jeep Gladiator JT

Fitments:
Part # Fitment
4170-01 2018- 2024 Jeep JL / JLU / JT
4170-60 2018-2024 Jeep JL / JLU / JT
4170-04 2018-2024 Jeep JL / JLU / JT
4170-12 2018-2024 Jeep JL / JLU / JT

Benefits:
Compatible with all aftermarket axle shafts (including RCV’s) with no modifications needed
Fully greaseable metal on metal ball Joint bearing surface has considerably larger area than stock due to elimination of the inner nylon liner for a longer lasting joint
Heavy duty, heat treated stud prevents unwanted movement and premature failure
Improves road manners and corrects sloppy steering
Features:
Fully greaseable metal on metal design for prolonged life
High carbon alloy 1045 steel ball joint housing provides a smooth bearing surface and robust design
Ball joint bearing race is manufactured from sintered graphite & oil impregnated bronze for a strong, smooth, bearing surface
Ball joint stud is manufactured from induction heat treated 4140 Chromoly steel for maximum strength and reliability
Ball joint dust boots are made from an industrial grade, wear and tear resistant black nitro-butyl rubber (NBR)
12 Month Unlimited-Warranty
Includes:
4170-01 4170-60 4170-04 4170-12
(1) Non-Knurled Upper Ball Joint
(1) Non-Knurled Lower Ball Joint (2) Non-Knurled Upper Ball Joints
(2) Non-Knurled Lower Ball Joints (1) Knurled Upper Ball Joint
(1) Knurled Lower Ball Joint (2) Knurled Upper Ball Joints
(2) Knurled Lower Ball Joints
Notes:
Metal on metal ball joints require a small break-in period of typically 100-500 miles to fully “seat” the bearing surfaces. During this time the steering may feel “sticky” or slow to “return to center”. Once broken in, the steering will be smooth and tight.
Knurled ball joints are required when replacing ball joints that have enlarged the axle end forging bores
It is up to the installer to verify the proper ball joint style is being used
Synergy High Performance Grease (4119) recommended
Installation Instructions

Synergy HD Ball Joints (above) vs. Mopar Factory Ball Joints (below)
Synergy HD Ball Joints feature a fully greaseable sintered metal on bushing design that has high wear resistance. Outperforms the Mopar factory plastic bushing.
Dana Spicer Uses a Negative coil spring on the wrong side of the load path resulting in Premature wear of the Ball Joints
More information: www.p65warnings.ca.gov