TeraFlex Dana 30/44 HD Ball Joint Kit for 2007-2018 Jeep Wrangler JK
- Guaranteed FitmentTeam-confirmed fit or money back
- No Sales TaxZero sales tax on every order
- 30-Day Money-Back GuaranteeReturn it within 30 days of delivery for a refund
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Fits the same truck
Features
- Sets of 2 or 4: Upper and lower joints for one side or both.
- Built for big tires: Handles the load of oversized tires and offset wheels.
- 4140 chromoly studs: Heat-treated ball studs in 1045 carbon steel housings.
- Greaseable design: Dual helical grease channels and zerk fittings.
- Adjustable preload: 30mm lower ball stud adjusts with hand tools.
- Knurl or no knurl: Knurled joints grip a loose-fit knuckle bore.
Description & Fitment
TeraFlex HD Ball Joints are made for the Dana 30 or Dana 44 front axle of every 2007-2018 Jeep Wrangler JK and JK Unlimited, to carry the extra load of oversized tires and offset wheels. Each upper and lower joint has a heat-treated 4140 chromoly ball stud, a 1045 carbon steel housing and a magnesium phosphate coating; the lower joint adds a slotted tool steel wear plate with dual helical grease channels and a 30mm adjustable ball stud for preload. Buy a set of 2 (one upper, one lower) or a set of 4, with or without knurl.
Fitment & Compatibility
| Years | Model | Bed | Notes |
|---|---|---|---|
| 2007-2018 | Wrangler | JK; Dana 30/44 front axle |
Check your Jeep: Wrangler JK or JK Unlimited 2007-2018 with a Dana 30 or Dana 44 front axle.
Not for: TJ/LJ/YJ/XJ/ZJ/MJ (1353000) or JL/JT.
About TeraFlex
TeraFlex describes itself as a Jeep company at heart, started and staffed by people who drive them. It designs, engineers and builds suspension systems, shocks, axles and performance parts, with the Wrangler and Gladiator at the center of the range.
The company traces its roots to the 1950s and MEPCO (Military Equipment Parts Company), an early supplier of Jeep parts. TeraFlex Manufacturing followed in 1996 to build heavy-duty suspension for the TJ Wrangler, and today's catalog runs from full lift systems and the Falcon shock line to axles, steering and armor.
Authorized TeraFlex dealer. Prestige Truck is an authorized TeraFlex dealer, so what we sell is new and genuine TeraFlex. In TeraFlex's words, its limited warranty extends "only to the consumer who originally purchased the product," so keep your receipt with your build records.
Frequently Asked Questions
Knurl or no knurl?
Joints without knurl won't score the knuckle and open the bore. Knurled joints are for knuckles with a loose press fit from repeated ball joint changes or past knurled joints.
Set of 2 or set of 4?
A set of 2 is one upper and one lower joint. A set of 4 covers both sides of the axle.
How long does install take?
TeraFlex estimates about 2 hours for a set of 2 and about 4 hours for a set of 4.
What warranty does TeraFlex give?
TeraFlex covers its ball joints, tie rods, tie rod ends and drag links for life against defects in materials and workmanship, and paint and powder coat finishes for 90 days. For knuckles, pitman arms, clamps and skid plates, contact us and we'll confirm the term before you order.
How quickly does it ship?
Shipping is free to the lower 48 states, and most orders arrive within 1-5 business days. We email your tracking number as soon as it ships.
Can you confirm it's the right part before I order?
Yes. Contact us with your VIN or year, model, front axle and lift height, and we'll check it against TeraFlex's fitment information before it ships.
Installation
- Basic mechanics tool set
- Ball joint press
- Grease gun/high quality grease
- Blue thread locking compound
- Large hammer
Here's the short version. Follow TeraFlex's install sheet (below) for your Jeep's exact steps and torque values.
- Lift and support the front, remove the front tires, the brake caliper and anchor bracket assemblies (support them so the brake lines and ABS wiring carry no weight) and the rotors.
- Unbolt and remove the ABS sensors, remove the three 12-point 13mm unit bearing bolts and pull out the unit bearing and axle, supporting the inner shaft to protect the seal; remove the dust shields.
- Pull the cotter pins and loosen, but do not remove, the ball joint nuts, free the outer knuckle (large hammer, pickle fork or similar), then press out the upper and then the lower ball joints with a ball joint press.
- Clean the bores and apply a little grease or anti-seize, press the new lower ball joint into the inner C with the raised grease passages facing the axle tube (facing away on RCV-equipped axles; same orientation both sides) and fit its grease zerk; take the boot off the new upper joint, press it in from the top down with the press cup centered, and refit the boot.
- Refit the outer knuckle on the ball joint studs with the ABS wiring retainer and torque the nuts to 70 ft-lbs (95 N-m), tightening further to line up the cotter pins; grease the joints (lowers until grease shows at the bottom lip seal, uppers until the boot swells slightly; do not overfill).
- Repeat on the other side, then reinstall the axle shafts, unit bearings and brakes in reverse order with the unit bearing bolts at 75 ft-lbs (102 N-m).
Stuck on a step?
Specifications
| Brand | TeraFlex |
|---|---|
| Product Type | Ball joint kit |
| Axle | Dana 30 / Dana 44 front |
| Quantity | Upper & lower, set of 2 (3440000 / 3440020) or set of 4 (3442002 / 3442022) |
| Material | Heat-treated 4140 chromoly ball/stud, 1045 carbon steel housing |
| Coating | Magnesium phosphate |
| Lower Ball Stud | 30mm (1.18") adjustable |
| Part number | 3440000 |
| UPC | 843885031239 |
| Part # | Version | UPC |
|---|---|---|
| 3440000 | Set of 2, No Knurl | 843885031239 |
| 3440020 | Set of 2, Knurl | 843885031871 |
| 3442002 | Set of 4, No Knurl | 843885031598 |
| 3442022 | Set of 4, Knurl | 843885031802 |
Warranty, shipping & returns
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Warranty
TeraFlex covers ball joints, tie rods, tie rod ends and drag links for life against defects in materials and workmanship, and paint and powder coat finishes for 90 days (defects only).- TeraFlex extends its limited warranty only to the consumer who first bought the product, and only on the vehicle the part was first installed on. It does not pass to a later owner.
- Coverage starts on the purchase date and does not restart if a part is repaired or replaced.
- For a covered defect, TeraFlex will either repair or replace the product (or the faulty part) free of charge or refund the purchase price, at its discretion, and it pays the freight to send a repaired or replacement part back to you.
- Not covered: damage from transportation, storage, improper use, skipped instructions or preventive maintenance, modifications, unauthorized repair, normal wear and tear, product finish, improper installation or maintenance, racing or competition, or accidents, abuse and neglect. Improper installation, poor maintenance, racing or competition use, and neglect or abuse void the warranty.
- Paint and powder coat finishes carry 90 days of defect coverage only, not wear from use.
- Claims: contact us first. Keep your proof of purchase or original invoice; removing the part from the vehicle and the inbound shipping are the owner's responsibility.
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Free shipping
Ships free to the lower 48 states, with no minimum order.- Order by 5 PM ET on a business day and it starts processing the same day.
- Most orders arrive within 1-5 business days.
- We email your tracking number as soon as it ships.
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Inspect on delivery
Check the drag link, tie rod, ends, jam nuts and any bracket against the TeraFlex parts list before you start, and contact us right away about anything missing or damaged. Check it as soon as it arrives.- Look for crushed ends, punctures or tears in the carton.
- If something looks wrong, take photos of the box and the parts (and if a driver asks you to sign, note the damage on the receipt).
- Open the box and check the parts against the parts list before you install.
- Email support@prestigetruck.com right away with your order number, a short note and photos. We send a replacement or a full refund at no cost to you.
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30-day returns
Return it within 30 days of delivery, unused, in the original packaging, with proof of purchase.- Email support@prestigetruck.com with your order number. We reply within 1-2 business days with instructions.
- Damaged, defective or wrong item: we send a prepaid label or arrange a pickup.
- Changed your mind: you pay return shipping. No restocking fee.
- Refunds go back to your original payment method within 7 business days of approval. See our returns policy.