Jeep Wrangler JK Dana 30/44 HD Ball Joint Kit - Non-Knurled, Upper & Lower, Set of 4

• 2 upper ball joints
• 2 lower ball joints

• Heat-treated 4140 chromoly ball studs in 1045 carbon steel housings.
• Magnesium phosphate coating throughout to resist corrosion.
• Upper joints use hard sintered wear bushings to cope with heavy side loads, with a factory-style serrated flange nut and grease fitting.
• Lower joints use a hard alloy tool steel wear plate with dual helical grease channels, so grease flows through the whole joint.
• 30 mm adjustable ball stud on the lower joints, so preload can be set at installation and re-adjusted later with simple hand tools.
• Two grease fittings on each lower joint give access from either side.
• Low-profile single-lip dust seals keep contaminants out.

This is the non-knurled kit, TeraFlex part number 3442002. Non-knurled joints will not score the inner knuckle or open up the bore, so they are the right choice for knuckles in good condition. Knurled joints are for knuckles with a loose press fit after repeated ball joint replacement, or where knurled joints have been fitted before.

TeraFlex lists an install time of about 4 hours. A ball joint press is required, and a wheel alignment is recommended afterwards.