Overview
The TeraFlex 3442022 is a four-joint ball joint set, two uppers and two lowers, for the front Dana 30 and Dana 44 axles on the Jeep Wrangler JK. The knurl helps the joint seat in a knuckle bore that has become loose from earlier replacements, and it suits loose press fits in the inner knuckle. The joints fit 2007–2011 JK axles.
The upper joint uses a sintered wear bushing that TeraFlex designed for heavy side loads. The lower joint has a threaded top cap for adjustable preload and a grease passage that lets the joint be greased without taking the axle shaft out. The ball and stud are 4140 chrome moly with a magnesium phosphate coating, and the housing is 1045 carbon steel.
Key features
- Four-joint set: two upper and two lower
- Knurled for loose press fits in the knuckle
- Sintered upper bushing for heavy side loads
- Threaded top cap and grease passage on the lower joint
- Black neoprene boot and factory-style castle nut
Loose knuckle bores
The knurled joint suits a knuckle bore that has grown loose, which can happen after several joint replacements. Knurling gives the joint something to grip when a smooth press fit no longer holds. It is a fit choice for worn knuckles rather than a standard for every build, so the bore condition should drive the decision.
Inspect and measure the bore before installing. Look for scoring, ovaling or a joint that spins in place. If the knuckle is worn beyond what a knurled joint can grip, replacing the knuckle is a more reliable fix. Grease the joint after installation, and recheck the castle nut torque after the first few drives.
- Inspect the bore for scoring or ovaling
- Use knurled joints only when the bore is loose
- Grease the joint after the first few drives
Specifications
| Brand | TeraFlex |
|---|---|
| Part number | 3442022 |
| UPC | 843885031802 |
| Set contents | Two upper and two lower joints |
| Knurl | With knurl |
| Upper bushing | Sintered |
| Ball and stud | 4140 chrome moly, magnesium phosphate coated |
| Housing | 1045 carbon steel |
| Lubrication | Grease fitting, lubeable |
Vehicle fitment
It fits 2007–2015 Jeep Wrangler (JK) models, including Rubicon, Sahara and Unlimited versions. The joints fit 2007–2011 JK axles with Dana 30 and Dana 44 front ends. Check your year, model and trim before placing an order.
Other Wrangler generations are outside this set’s application. Check your year, model and trim before placing an order.
Installation notes
Use the knurled set only when the bore is loose, since non-knurled joints suit most knuckles. A knurl can score the inner knuckle if it is used in a tight bore.
What’s included
Two upper and two lower ball joints with knurl, boots and castle nuts. Both uppers and lowers are included in the set.
