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Your cart is empty.Treacle JK/JKU Heavy-Duty Ball Joints are engineered to handle the increased load caused by oversized tires and offset wheels. FITS: JK Wrangler (2-door) w/ Dana 30 or 44 axle JKU Wrangler Unlimited (4-door) w/ Dana 30 or 44 axleINCLUDES: Upper ball joints w/out knurl - pair Lower ball joints w/out knurl - pairUPPER 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 chromo ball/stud & 1045 carbon steel housing Factory-style serrated flange nut & grease fittingLOWER 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 chromo 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/ two zero fittings allow greasing access from either side w/out axle shaft removal even w/ larger RCV shafts 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
Customer
2025-08-28 21:05:04
Teraflex hd balljoints are very heavy duty and are adjustable too, about ecery 3000 to 5000 miles check and keep grease in them works great
Keith
2025-08-24 10:54:28
What else is there to say these are great quality. I wheel pretty hard on 37's and they've lasted. I ended up tearing a boot when I was installing them and Terflex sent out new ones for free. Great ball joints from a great company.
Jason Castaneda
2025-08-21 16:18:16
I love the ride quality with these installed on my 2013 Jeep jku Rubicon. I couldn't go faster than 65 before without significant vibration. Now I can drive 80 easily with no vibration.
Dean
2025-07-28 10:45:55
Purchase these ball joints for my jeep Rubicon, and installed them the same week. Instructions were clear, and I already had the tools to install them.. a personal preference is to prime them with grease them before installing them ensuring that it is barely visible coming out the other side. Just ensure to take the grease fittings off before pressing them into the control arms. This made it a lot easier to top them off with grease once installed with the rubber boots.
Marcelo O.
2025-07-13 15:15:01
Got death wobble? Your buddy tell you running 35's will be fine on your OEM ball joints? Considering these ball joints with others in an oversaturated aftermarket? Let me clear the muddy water for you. Get these. My OEM ball joints were shot, and I wheeled with those same OEM ball joints for entirely too long. After MONTHS of research, talking with a few friends that own shops and JK's- I went with these. My only mistake was not upgrading sooner. Teraflex really impressed me on several levels. Firstly, the packaging is phenomenal. Every ball joint has its place in a custom hard foam fit box, all the serkis fitting for grease and hardware is included. Secondly, they're STOUT! My buddy asked me what I was planning for when he saw them, and I confidently replied "whatever I throw at them." Lastly, THEY'RE ADJUSTABLE. Why's that a big deal, you ask? Because on solid axles, with traditional ball joints, you're stuck with the camber/caster angle the ball joints give you. With these, you can appropriately adjust so that your wheels are perpendicular with the road and parallel to one another. Looking forward to whatever adventures these ball joints see me through. No more death wobble, no more anxiety when driving, and no more issues thanks to Teraflex. Install wasn't bad at all. To see more on these, find my build on Instagram: @Team_NachoJKGo ahead and click the 'buy now' button. You'll thank me later.
Cameron Bennett
2025-07-09 17:10:28
I saw a few reviews with folks having issues with these. I don't review a lot and want to help the next person out with what they are buying if I can. I bought these from Amazon and didn't get any deals. I have had great luck with these on my heavily modified JKU with 37s. I was in a bind before a wheeling trip and they arrived right on time. I installed them myself. Make sure you have the right cup for your ball joint press. Some of the standard kits don't fit JKs without extra adapters. I took my sweet time, followed the instructions, got them aligned just right, and double checked all my work. One of them ended up binding up after I installed it. I called Terraflex and supprt dude I talked to was really good and helpful. Ended up popping off the spindle, then reinstalled and checked the torque of both sides with no problems. Went wheeling on a badge of honor trail that weekend with no issues. The real test was about a month later we took the trip from the Pacific NW to the Artic Ocean through Canada. That's a lot of miles on some rough road. To make it even more sporty, we found out when we got to Inuvik that there was a gap in the road maintenance on sections of The Dempster making parts of it even more rough than normal. I just went through everything in my drivetrain for a second time since returning and found absolutely no play in these ball joints.I know Dtracs are the gold standard but I would recommend these to save a few $ for a solid product depending on your build goals and use. The grease zerks seem like they would be hard to get to on the bottoms. With the axle in the right orientation, it's actually pretty easy. I can't seem to get standard grease gun end on the front one, but the back works great. Make sure you pay a lot of attention to the orientation when installing these.The couple cons is the silly little spanner socket and the set screws. It's tough to get a bite for recommended 70 in/lbs without the spanner socket slipping off. I have not had issues with the set screws and they did come loose for me this time after a few months installed to check the after breaking them in. I can see them being an issue a couple years down the road with corrosion if they need retightened. If that happens, it's not going to be an easy fix since they are not easy to get access to when everything is together.
Edward Kohler
2025-06-26 12:01:13
I put these on what was my VERY rusty rust belt junker 2008 JKU… I’d already done literally every steering/suspension part on the underside of the car; sometimes going for bottom of the barrel stuff and sometimes splurging a bit. Here I splurged; put these in place of the factory ball joints which were blown out (the lowers at least) and replaced the wheel bearings at the same time with some TRQ cheapos. I’m 31 now and I’ve been driving this car since I had my permit and the transformation was shocking… I don’t think it’s ever been quite this nice and was a rickety jalopy the month prior; even after having put ~$2k into suspension components already. These absorb the horrific potholes and expansion cracks as well as can be expected for an old Jeep. Can turn on a literal dime and it somehow doesn’t feel like the car will crumble to dust on the next bump.Expensive, but worth it so far. You could pay ~230% as much and get the next best thing but for a car with a dubious future these are a good value. Curious to see how long they last; possibly through the life of the next JK I buy. But I’m a grandpa-tier driver.*thumbsup*
Andrew
2025-06-25 10:14:52
Very good quality- do a little research on the tricks to successful install and pay attention to how the zero fittings on bottoms will line up-this will save u lots of headache.I stripped one of my zerk fittings when screwing it in, I called Teraflex customer service and got great service from Jane - nice to see a company stand behind its productThese ball joints are definitely an upgrade over stock
Rodrigo Reyes
2025-05-09 11:49:36
Son de excelente calidad y muy robustas, es precisamente lo que necesito para mi vehÃculo
Donna
2025-04-01 14:58:50
Arrived in Australia from USA in 6 days. Great product and fantastic service from Amazon again.
1003960271
2025-03-18 17:39:48
The repair shop asked for even more money for the oem replacement, so I went with these. Seems good quality. Let’s see how long they will last
GB
2025-02-16 14:37:18
Excelente producto sobre todo para corregir camber pues es una solución ideal incluso cuando te pretender cambiar el eje por unos pocos grados de desviación.
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