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| Manufacturer: | Synergy MFG |
| Part #: | 4127KN |
Synergy Jeep JK / JKU Adjustable Ball Joint Kit
After 5 years of development and over 100,000 test miles our Heavy Duty Adjustable Jeep JK Ball Joints are here! This is the last set of ball joints you will ever have to buy. Limited Lifetime Warranty. Tighten up your steering for good with our patent-pending (# 16/020894) design which is fully adjustable, serviceable, and rebuildable without having to press the ball joints back out of the axle end forging yokes (C's). These ball joints never have to come back out. Available in knurled and non-knurled versions to fit all vehicles regardless of what type of ball joints were installed previously. Lower ball joint bearing surfaces are CNC machined from 4140 steel, heat treated, induction hardened, and ferritic nitrocarburized to make these the longest lasting, longest wearing ball joints on the market. Kit includes all 4 ball joints to service one Jeep and the adjuster tool for adjusting the preload on the lower ball joints.
Fits:
07-18 Jeep Wrangler JK/JKU
Benefits:
Tightens sloppy steering
Designed to last the life of the vehicle
Never need to replace ball joints again
Best in class price/performance ratio
Limited Lifetime Warranty
Features:
- Kit includes all 4 ball joints and lower ball joint adjuster tool
- Patent Pending lower ball joints are adjustable so they always have the correct amount of preload
- Knurled and non-knurled ball joint housing options to fit any vehicle
- Lower ball joints are rebuildable on the vehicle without removal
- Lower Ball Joint bearing surfaces are CNC machined from 4140 steel, heat treated, induction hardened, and ferritic nitrocarburized for extreme wear resistance
- Low profile dust boots are made from thick nitrobutile rubber (NBR) to protect the joint from contaminants and eliminate any chance of tearing
- Zerk fittings included for trouble-free maintenance
Notes:
- Synergy 4119 High Performance Grease recommended
- Knurled ball joints required when replacing knurled ball joints that have enlarged the axle end forging bores
- Non-Knurled ball joints recommended for replacing non-knurled ball joints
- Due to these ball joints being tight tolerance, metal on metal ball joints, proper fitment is critical. Using the wrong style of ball joints can cause significant steering issues. We always recommend installing non-knurled ball joints until non-knurled ball joints are no longer a press fit into the axle end forging bores. If your axle end forging bores have been enlarged to the point that non-knurled ball joints are no longer a press fit, knurled ball joints are required.
- Use of the improper ball joint style for the axle housing voids our lifetime warranty. It is up to the installer to verify the proper ball joint style is being used.
- Compatible with RCV axle shafts
- Rebuild Kits and Replacement Parts Available
- Our order processing system is fully automated to ensure quick and accurate fulfillment. Once an order has been submitted, we’re unable to modify or cancel it.
- If you have questions regarding fitment or estimated shipping times, please contact us before placing your order, as special notes or messages are not visible until after processing begins.
- Most orders ship the same business day and typically arrive within 1–3 business days. We ship from multiple warehouses across the United States to ensure fast delivery. On rare occasions, items may require drop-shipping or may be temporarily back-ordered, which can extend delivery times. If this occurs, we will notify you promptly with updated information.
- We ship orders using UPS, USPS, and FedEx, depending on your location and the item ordered.
- Expedited shipping options are available at an additional cost.
- All orders over $300 will require a signature upon delivery for security and confirmation of receipt.
- Please note that shipping charges are non-refundable.
Most of our orders are shipped the same day they are placed and get to our customers within 1-3 business days. We ship from many warehouses throughout the United States.
There may be a slight occasion where it may take longer. If an order needs to be drop shipped or is back ordered, ship time can take much longer. If this occurs, we will notify you as soon as possible.