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Description
Synergy 4170-60 Heavy-Duty Ball Joint Set (Smooth)Upgrade the ball joints in your vehicle with the Synergy 4170 60 Heavy Duty Ball Joint Kit from GAP. These ball joints use a metal on metal bearing design, unlike the factory (plastic nylon bearing design), to improve durability and performance. A must for vehicles with lifts and larger tires that see off road use. Get rid of that steering wander and play caused by loose or worn out ball joints. While Jeep may have updated the JL JLU and JT steering
Upgrade the ball joints in your vehicle with the Synergy 4170-60 Heavy Duty Ball Joint Kit from GAP. These ball joints use a metal on metal bearing design, unlike the factory (plastic nylon bearing design), to improve durability and performance. A must for vehicles with lifts and larger tires that see off road use. Get rid of that steering wander and play caused by loose or worn out ball joints. While Jeep may have updated the JL / JLU and JT steering knuckle to use a dual load bearing upper and lower ball joint, they still kept the problematic nylon inner liner which is prone to premature wear. These Heavy Duty Ball Joints feature the latest design used in other ball joint applications with our proven design that are sure to stand the test of time.
(2) Lower Ball Joint
Knurled ball joints are required when replacing ball joints that have enlarged the axle end forging bores
It is up to the installer to verify the proper ball joint style is being used.
Features:
- Fully Greaseable Metal On Metal Design For Prolonged Life
- Compatible With All Aftermarket Axle Shafts (Including RCV's) With No Modifications Needed
- Ball Joint Housing Is Manufactured From 1045 High Carbon Alloy Steel For A Strong, Smooth, Bearing Surface
- Ball Joint Dust Boots Are Made From An Industrial Grade, Wear/Tear Resistant Black Nitro-Butyl Rubber (NBR)
- Ball Joint Stud Is Manufactured From Induction Heat Treated 4140 Chromoly Steel For Maximum Strength & Reliability
- Ball Joint Bearing Race Is Manufactured From Sintered Graphite & Oil Impregnated Bronze For A Strong, Smooth, Bearing Surface
- Ball Joint Bearing Surface Area Is Considerably Larger Than Stock Due To Elimination Of The Inner Nylon Liner For A Longer Lasting Joint
- 12 Month Unlimited-Warranty
4170-60 Heavy-Duty Ball Joint Set Includes:
(2) Upper Ball Joint(2) Lower Ball Joint
Notes:
Metal on metal ball joints require a small break-in period of typically 100-500 miles to fully "seat" the bearing surfaces. During this time the steering may feel "sticky" or slow to "return to center". Once broken in, the steering will be smooth and tight.Knurled ball joints are required when replacing ball joints that have enlarged the axle end forging bores
It is up to the installer to verify the proper ball joint style is being used.
Part Number 4170-60 Includes (2) 4170-01
Synergy High Performance Grease (4119) recommended.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
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Product Reviews
★★★★★ 5
stunning
Color: Gold, Lens Width: 36 Millimeters
stunning
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Reviewed in the United States on May 14, 2026
★★★★★ 4
great glasses
Color: Brown, Lens Width: 37 Millimeters
daughter loved them!
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Reviewed in the United States on February 27, 2026
★★★★★ 5
Stylish and good fit.
Color: Brown, Lens Width: 37 Millimeters
Very pretty, and they’re the perfect size for my face, sitting comfortably on my face. No tilting to the side like some glasses I’ve worn.
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Reviewed in the United States on July 20, 2025
★★★★★ 5
Harley Davidson Stylish Sunglasses
Color: Brown, Lens Width: 37 Millimeters
Love these stylish sunglasses. Harley Davidson never disappoints. Buy them. You deserve them!
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Reviewed in the United States on July 30, 2025
★★★★★ 5
Great quality
Color: Brown, Lens Width: 37 Millimeters
I normally like to try on sunglasses but these were a deal on the Prime days and I gave them a chance and am so happy I did! They fit really well being not too big and not too small, and they also aren't tight against my head. They came with a case to keep them from being scratched which I truly appreciate. Excellent value for the price.
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Reviewed in the United States on August 1, 2024
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