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Description
Synergy 4123KN Heavy-Duty Adjustable Ball Joint Kit (Knurled)Get the Synergy 4123KN Heavy Duty Adjustable Ball Joint Kit (Knurled) from GAP and upgrade your 2003 2013 Dodge Ram 2500 3500 4WD. After 5 years of development and over 100,000 test miles the Synergy Heavy Duty Adjustable Ram Ball Joints are here! This is the last set of ball joints you will ever have to buy. Tighten up your steering for good with Synergy's patent pending (# 16 020894) design which is fully adjustable, serviceable, and rebuildable
Get the Synergy 4123KN Heavy-Duty Adjustable Ball Joint Kit (Knurled) from GAP and upgrade your 2003-2013 Dodge Ram 2500/3500 4WD. After 5 years of development and over 100,000 test miles the Synergy Heavy-Duty Adjustable Ram Ball Joints are here! This is the last set of ball joints you will ever have to buy. Tighten up your steering for good with Synergy's 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. These ball joints never have to come back out. 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 truck and the adjuster tool for adjusting the preload on the lower ball joints.
Features:
Non-Knurled Ball Joint Housing
Contaminants And Eliminate Any Chance Of Tearing
Zerk-Fittings Included For Trouble-Free Maintenance
Lower Ball Joints Are Rebuildable On The Vehicle Without Removal
Hardened, And Ferritic Nitrocarburized For Extreme Wear Resistance
Lower Ball Joint Bearing Surfaces Are CNC Machined From 4140 Steel, Heat Treated, Induction
Low Profile Dust Boots Are Made From Thick Nitrobutile Rubber (NBR) To Protect The Joint From
Patent Pending Lower Ball Joints Are Adjustable So They Always Have The Correct Amount Of Preload
Best In Class Price/Performance Ratio
Designed To Last The Life Of The Vehicle
Never Need To Replace Ball Joints Again
Limited Lifetime Warranty
Contaminants And Eliminate Any Chance Of Tearing
Zerk-Fittings Included For Trouble-Free Maintenance
Lower Ball Joints Are Rebuildable On The Vehicle Without Removal
Hardened, And Ferritic Nitrocarburized For Extreme Wear Resistance
Lower Ball Joint Bearing Surfaces Are CNC Machined From 4140 Steel, Heat Treated, Induction
Low Profile Dust Boots Are Made From Thick Nitrobutile Rubber (NBR) To Protect The Joint From
Patent Pending Lower Ball Joints Are Adjustable So They Always Have The Correct Amount Of Preload
Benefits:
Tightens Sloppy SteeringBest In Class Price/Performance Ratio
Designed To Last The Life Of The Vehicle
Never Need To Replace Ball Joints Again
Limited Lifetime Warranty
4123KN Heavy-Duty Adjustable Ball Joint Kit Includes:
(2) Upper Ball Joints(2) Lower Adjustable Ball Joints
(1) Ball Joint Hardware Kit For All Joints
(1) Ball Joint Adjuster Wrench To Set Pre-Load
Notes:
Non-Knurled ball joints recommended for replacing non-knurled ball jointsDue 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
Synergy 4119 High Performance Grease recommended
Limited Lifetime Warranty:
For the original purchaser, this warranty covers defects in materials or workmanship of the ball joint for the lifetime of the joint. Ball Joints are wear items and normal wear of the ball joint is not subject to this Limited Lifetime Warranty. The wear items of the ball joint will periodically need to be replaced once the adjustment in the joint is used up and are available separately as a ball joint rebuild kit. Length of time between rebuilds is subject to the use and build of the vehicle.
Applications:
2003-2013 Dodge Ram 2500 4WD2003-2013.5 Dodge Ram 3500 4WD
2006-2008 Dodge Ram 1500 Mega Cab 4WD
Note: 2013 Dodge Ram 3500's were a split year for production. If your truck has radius arms use Dodge Ram 2014+ pages
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
4.5 ★★★★★
Based on 2451 reviews
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Product Reviews
★★★★★ 5
Picky dog approved!
Color: S6-muti-color, Color: S6-muti-color
I have wasted so much money on dog balls that they won't even pick up! They finally were obsessed with the Kong rubber green/blue or red/blue ones, but they're $3+. each, and they break from the dogs squishing it. I honestly had zero expectations on these, and they BOTH picked them up on the first throw! That's huge!!
Seem to work fine in the ChuckIt.
As for the squeaker, at first I was like "Oh nooooo." when they both loudly started! Much to my (and my neighbors') happiness, the squeakers stopped working after a couple minutes. 🤣
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Reviewed in the United States on February 2, 2025
★★★★★ 5
Great dog toys
Color: S6-muti-color
These are long lasting, durable dog toys. My dogs love the squeak sound.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Durable
Color: S6-muti-color
The balls are great for chewers. The squeaky didn’t last long but they are perfect for the ball launcher.
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Reviewed in the United States on May 18, 2026
★★★★★ 4
The squeeker isn't durable, but the balls themselves are.
Color: S6-muti-color, Color: S6-muti-color
I have two 70+lb, ball obsessed dogs (a field bred Golden Retriever, and an Old Time Scotch Collie), and these balls are living up to the abuse they're receiving.
In the fall we always lose a ball or two in the yard due to getting lost in leaves or longer grass, so I always try and buy a multi pack at the start of the season, so went with these this year. I'm glad I did. Great price for a 6 pack, they fit the medium Chuck-It launcher (a little loosely, but they throw just fine), have great bounce, they FLOAT (which means I didn't lose any at the beach), and they're super durable to the dreaded "mouth squish." The squeaker dies pretty quick, like, within a day, but it isn't the kind that can fall out or choke your dog, so no worries there.
The boys are happy, I'm happy, my wallet is happy - I've already ordered another pack.
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Reviewed in the United States on November 2, 2024
★★★★★ 5
Good balls
Color: S6-glow
My dog is a chewer, and these have held up for close to a year actually a pretty good product
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Reviewed in the United States on May 27, 2026