TeraFlex TJ/LJ Heavy-Duty Ball Joints are engineered to handle the increased load caused by oversized tires and offset wheels. Without knurl. Fits: TJ Wrangler LJ Wrangler Unlimited (long wheelbase) Applications: Dana 30 front axle Dana 44 front axle Includes: Upper ball joints w/out knurl - pair Lower ball joints w/out knurl - pair UPPER BALL JOINT FEATURES: Extremely hard sintered wear bushings to handle extreme side load demands w/out failure Magnesium Phosphate coating to inhibit corrosion throughout Heat treated 4140 chromoly ball/stud & 1045 carbon steel housing Factory style serrated flange nut & grease fitting W/out knurls LOWER BALL JOINT FEATURES: Hard alloy tool steel slotted wear plate for ball/stud to socket wear protection Wear plate features grease channels for increased flow through entire joint ensuring longevity & predictable operation Magnesium Phosphate coating to inhibit corrosion & friction throughout Heat treated 4140 chromoly ball/stud Huge 30mm (1. 18”) ball Factory style serrated flanged castle nut Ball joint pre-load adjustability provides the end user w/ near effortless wear adjustment (kit includes Preload Adjustment Tool) Low-profile single lip dust seal eliminates torn conventional dust boot concerns Adjustable ball stud retaining ring for accurate initial & future preload adjustments that can be done w/out any axle disassembly Adjustable preload can be performed w/ simple hand tools Adjustable end cap w/ (2) zerk fittings (“Frog Eye”) allow greasing access from either side w/out axle shaft removal Dual helical grease grooves machined in the retaining ring allow spent grease to exit through the low-profile seal Low-profile seal prevents contaminants, while allowing spent grease to evacuate from the ball joint W/out knurls Note(s): WIll not work w/ RCV Shafts We recommend ball joints w/out knurls (# 1355100) as they will not score the inner knuckle & open up the bore. Also offered w/ knurls (# 1355300) for ball joints w/ a loose press fit in the inner knuckle due to repeated ball joint replacement or if knurled ball joints have been installed in the past. INSTALL TIME: 4 Hours