TeraFlex HD ball joints are engineered to handle the increased load caused by oversized tires and offset wheels. The upper ball joint incorporates hard sintered wear bushings to handle extreme side load demands with out failure. The lower ball joint features a threaded top cap for adjustable preload and allows grease servicing without axle shaft removal, even with larger RCV shafts. A machined grease passage in the lower joint housing assembly provides lubrication access without affecting the ball joint load surface. Ball Joint features: 1045 carbon steel housing with magnesium phosphate coated assembly. 4140 chromoly ball/stud with magnesium phosphate anti-corrosion coating.
Should you get the ball joints without knurls if it is the first time replacing the ball joints from factory?
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In regards to the TeraFlex Dana 30/Dana 44 JK HD Ball Joint Set Without Knurl here is what TeraFlex says about the differences:
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.
So I read this as if the bore is not damaged and or you have not replaced ball joints before, keep without knurl. If the bore is a little loose, use knurl.
If you have any further questions you can contact our customer service center @ 877-474-4821
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What is TeraFlex? A suspension company? Sure, but not just any suspension company. TeraFlex is a Jeep Wrangler suspension company. TeraFlex engineers enjoy coming up with products for one of the most engineered vehicles on the market. Interchangeable, dependable and durable - that is where TeraFlex comes in. TeraFlex picks up where Jeep left off to make Wranglers even better. Teraflex prides itself on striving for perfection in every aspect of product manufacturing and design. TeraFlex delivers the quality that hardcore off-road enthusiasts demand. Shop TeraFlex Now