TeraFlex Install: JK/JKU HD Dana 30/44 Upper & Lower Ball Joint Kit

TeraFlex 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 axle

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

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/ two zerk 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

NOTE:

• We recommend Ball Joints w/out Knurls (# 3442002 or # 3440000) as they will not score the inner knuckle & open up the bore.

• We also offer Ball Joint w/ Knurls (# 3442022 or # 3440020) for ball joints that have 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

[jamesgrant]

Thanks for posting this up. I just did the ball joints on my 2015 JK and this vid helped a lot!

[reeceprice]

This is this is the first place, I have ever seen that you need to drain the diff to remove the axle shafts. That is extra work that really does not need to be used.

[matthewtruscott]

I wish they would do install with rental tools like most of us use. You have to install the lower first what's your typical Auto parts rental tool.

[JeepTJWheelin]

Getting these soon. Made a mistake installing Alloy ball joints. After just 14 months, they failed.

[mac]

Is dennis no longer doing the voice over?helps me sleep like storytime..

[clyse]

not to bad, just really in debate on doing the seals.

[jfloydsea]

How do you adjust them when installed for RCV axles? The 3rd set-screw is impossible to reach even when turning the tires.

[MichaelCook]

I guess if you're wanting to sleeve the axle, now would be a good time.

[danmulkiewicz]

@teraflex Which direction should the lower ball joint adjustment roate to tighten the preload? I dont see any indication in the installation instructions or on this video....

Depending how the special wrench is oriented on the torque wrench it could be either direction.

Thanks.

[traceymoss]

I bought these ball joints. After reading the description, it states that modifications need to be made to late 2012 and up Wrangler models to use these ball joints. What are the modifications needed?? Are there other ball joints we can purchase that don’t require modifications?? Just wondering if we can use these in my 2013 Sahara.

[cox]

@Teraflex great timing on this video as I just purchased those ball joints. I will be running 37" tires...my understanding is these ball joints can handle 37's...is that true?

[scottgerman]

I just installed a my ball joints having a little trouble getting the boots on the upper ball joints to seat.

[dreedy]

Should the outer knuckle be stiff after torqued to 70 lb ft? It’s much tighter now compared to when I was taking it apart! Thanks!!! Great video!

[jasonkus]

On average how many miles are you getting out of a set of these balljoints? I have 35” tire and do mild wheeling.

[jkmoneygone]

Installing as we speak 🗣 “type or read”

[kylewogelius]

Im noticing im having to torque the "preload" very frequently... almost every 3k miles. Just the other day, I tried to retighten the preload and I couldn't get the provided wrench to properly sit on the preload nut. Grease keeps getting in between the nut and the wrench and is making things very hard to tigthen. Any thoughts? Thanks.

[gotryche]

Just installed mine but can I get one lower ball joint grease to come out, Don't see it leaking out as a squeeze the grease

[deisychavez]

I just got my heralded ball joints installed on my jk 2017 and one of the upper ball joint I noticed that the grease zerk broke off. What can I do now?

[MrBradneal]

Anyone have upper balljoint bolt spin while trying to tighten? Seems odd on a brand new balljoint for the bolt to spin while tightening. Made it almost impossible to fully tighten to 70 ft lbs.

[cardenasrc]

Ok, so I have RCV axles, my grease passages should face the tire right?