Kryptonite Heavy Duty Replacement Upper & Lower Ball Joint Package 9920BJPACK Fits 1999-2023 F-250 / F-350 Super Duty 4WD ONLY
Condition: New
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Availability:
In Stock.
Arrives
Thursday, Jul 30
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Brand: Lassos Boutique
Item Weight: 7.67 pounds
Package Dimensions: 10.24 x 6.06 x 3.43 inches
Manufacturer Part Number: 9920BJPACK
Date First Available: April 6, 2020
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Jul 30
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Great quality, they fit perfect on my dodge. Just a heads up the 99-24 ford 4wd ball joints also work on a 94-99 dodge ram 4wd. I purchased these because they were the only set of kryptonite ball joints with next day delivery. 📦
Reviewed in the United States on November 7, 2025 by Bryce
Nice, heavy duty ball joints
Reviewed in the United States on March 15, 2026 by Colby F.
Really good quality, definitely would buy again👍🏼
Reviewed in the United States on March 4, 2026 by brandon skipper
Perfect ball joints. Fit very well ease of installation was amazing. Super high quality. Definitely would recommend them to anybody thinking about replacing ball joints in their Super Duty
Reviewed in the United States on September 14, 2025 by Christopher Altschuler
The upper and lower ball joints worked great. The upper does not press in far enough to install the snap ring but neither did the OEM Ford upper ball joints. Used the lower ball joint grease zerk to fill the upper ball joint and then installed the plug. Installed the zerks on the bottom ball joints. Re used the wheel bearings and inspected the u joints while they were out. The ride seems a lot smoother but it's still a 3/4 ton truck so not like a half ton. Turning is a lot easier and no wandering. Got rid of the popping and the ball joints that I removed were Moog and rusty and worn out terribly. Hoping that I don't have to use the warranty within the next 2 years!!!
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Reviewed in the United States on March 14, 2024 by Samantha Jackson
I really wanted some quality aftermarket ball joints to replace the worn out stocks. Have heard a lot of great things about kryptonite. Got them installed no problem at my shop. Torqued them down to the specifications they shipped in the box. Less than a month later both lower ball joint nuts came loose and backed off to finger tight. Both lower ball joints have low profile nuts that aren’t even nylon lock nuts. There’s 3 very small indents that supposedly makes it a lock nut. I took it all back apart and re torqued them down with an extra 10 ft lbs. bringing it to about 160 ftlbs on the lower ball joints. Even put some red lock tight on them. Also took a punch and tried to peen the lock nut farther into the threads. Put a paint mark on them to easily look under it and check it. Sure enough not even a week later they are already coming loose again. I also noticed my steering knuckles are very tight ever since installing. No matter how much grease I pump into them. The ball joints are just stiff. No longer have any return to center in my steering wheel. Truck doesn’t pull though thankfully. I want to believe they are good quality ball joints but I honestly think they need to find a better lower ball joint nut. The top ball joint is a castle nut and obviously there were no problems with those.
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Reviewed in the United States on August 17, 2025 by Ben
Fit great, aligned easily after installation. Fixed my memory steering issues. Before installing, I could turn the wheel on an on ramp and it would keep steering through the ramp after I took my hands off the wheel. I think the previous owner replaced the bank joints and over torqued them. I installed these and torqued them properly, bottom to 35 lbs and then torque the top to 69 lbs and then re-torque the bottom to 150 lbs. Good to go.
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Reviewed in the United States on July 7, 2024 by Travis
Was not impressed. Grease fittings doesn’t fit any of my grease guns…. Maybe because we’ve all been using Chinese products so long and these say made in USA. so had to buy those to grease it. Ball joints Litterally feel like they are seized up and now after installing my steering wonders back and forth on the road.
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Reviewed in the United States on March 7, 2025 by Adler