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Product Reviews
Vehicle Fit

These new, replacement upper & lower ball joints are just what you need to ensure the safety and integrity of your vehicle's suspension and steering.


  • Comes as a PAIR
    • Fits both LH (Driver Side) or RH (Passenger Side) FRONT UPPER & LOWER
  • Attaches the Front knuckles into the ears on the front end
  • Direct replacements
  • Built to strict quality control standards
  • Correct for 4WD Models

Worn ball joints can cause excessive front tire wear, popping or creaking in the front end, extra play in the steering system, and pose a serious safety concern. Replace loose or worn ball joints with our quality replacement.

One way to diagnose a loose, or warn ball joint, is to jack the car up, so the wheel is off of the ground, then have someone try to move the wheel in and out. While they are moving the wheel check the ball joint for play, if it is moving you probably need to replace it.

Our steering and suspension components are pre-greased and sealed for long life and do not require the extra maintenance typically required by greasable versions.

Item Condition: New

Attention California Customers:

WARNING: Cancer and Reproductive Harm -

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Removing the Wheel (1:03)
    • Loosen the 19mm lug nuts with the vehicle on the ground
    • Straighten the cotter pin on the axle nut with needle nose pliers
    • Remove the cap and washer from the axle nut
    • Loosen the axle nut with a 36mm socket and breaker bar
    • Raise the vehicle with a floor jack
    • Secure the vehicle on jack stands
    • Remove the lug nuts
    • Pull off the wheel
  2. step : Removing the Brake Rotor (2:29)
    • Remove 13mm bolts from the brake caliper
    • Pull the caliper aside and secure it out of the way with a bungee chord
    • Pull the rotor off
  3. step : Removing the Hub (3:17)
    • Spray rust penetrant around the contact points of the hub
    • Remove the three 13mm 12-point bolts from the hub
    • Pry off the washer from the axle (if you have one) with a pick
    • Tap the axle in with a hammer to free the splines from the hub
    • Tap the hub out of the spindle with a hammer
    • Remove the hub and dust shield
  4. step : Loosening the Tie Rod (4:56)
    • Remove the cotter pin from the tie rod castle nut with a pair of pliers
    • Remove the 19mm castle nut from the tie rod
    • Hit the edge of the spindle to release the stud
    • Release the tie rode from the spindle
  5. step : Removing the Lower and Upper Ball Joint (6:08)
    • Remove the cotter pins from the upper and lower ball joints
    • If the cotter pin breaker or gets stuck, punch the pin through with a punch and hammer
    • Remove the axle shaft from the housing
    • Insert rags or a glove to stop axle fluid from leaking
    • Remove the two 22mm castle nuts from the ball joints
    • Insert a pick fork between the upper ball joint and the spindle to release the ball joint
    • If needed, hit the bottom to release the spindle from the axle
    • Remove the upper ball joint with a ball joint press
    • Repeat the process for the lower ball joint
  6. step : Installing the Lower and Upper Ball Joint (11:36)
    • Remove the boots from the ball joints
    • Press the upper ball joint into the spindle with the ball joint press until it bottoms out into the slot on the axle
    • Insert the boot to the upper ball joint
    • Press the lower ball joint into the spindle with the ball joint press until it bottoms out into the slot on the axle
    • Insert the boot to the lower ball joint
    • Hand-tighten the lower ball joint castle nut
    • Hand-tighten the upper ball joint castle nut
    • Tighten the lower ball joint castle nut with a 32mm socket and ratchet
    • Tighten the upper ball joint castle nut with a 22mm socket and ratchet
    • Torque the upper ball joint nut to 75 foot-pounds
    • Torque the upper ball joint nut to 80 foot-pounds
    • Install the lower cotter pin with the longer end facing down over the stud
    • Cut the shorter leg off
    • Install the upper cotter pin with the longer end facing down over the stud
    • Cut the shorter leg off
    • Tighten the upper ball joint grease fitting with a 7mm wrench
    • Add grease to the ball joint until the boot swells without popping off the joint
    • Remove the rags blocking the axle fluid
    • Insert the axle into the differential
  7. step : Reinstalling the Tie Rod (15:41)
    • Insert the tie rod into the spindle
    • Tighten the 19mm castle nut
    • Torque the tie rod nut to 35 foot-pounds
    • Insert the new cotter pin into the tie rod
    • Bend the longer leg over the top of the stud
    • Cut the shorter leg
  8. step : Installing the Hub (16:37)
    • Insert the dust shield into place
    • Insert the hub into place
    • Tighten the 12-point 13mm bolts
    • Torque the hub bolts to 75 foot-pounds
  9. step : Installing the Rotor (17:27)
    • Insert the rotor onto the hub
    • Press the caliper onto the rotor
    • Tighten the two 13mm bolts to the caliper
    • Torque the caliper mounting bolts to 20 foot-pounds
  10. step : Reattaching the Wheel (18:07)
    • Slide the wheel into place
    • Start the lug nuts by hand
    • Tighten the lug nuts preliminarily
    • Lower the vehicle to the ground
    • Tighten the lug nuts to between 110 foot-pounds in a crossing or star pattern
    • Torque the axle nut to 175 foot-pounds
    • Insert the axle nut cap into place
    • Insert a new cotter pin into place
    • Turn each end of the cotter pin to opposite sides of the nut

Tools needed for replacement:

    General Tools

  • Center Punch
  • Hammer
  • Pick

  • Materials, Fluids, and Supplies

  • Rust Penetrant
  • Bungee Cord

  • Pliers, Cutters & misc Wrenches

  • Needle nose pliers

  • Ratchets & Related

  • A Piece of Pipe (for leverage)
  • Ratchet
  • Torque Wrench
  • Socket Extensions

  • Screwdrivers & Related

  • Pry Bar

  • Sockets - Metric

  • 19mm Socket
  • 13mm Socket
  • 36mm Socket
  • 22mm Socket

  • Specialty Tools

  • Ball Joint Press
  • Pickle Fork
  • Grease Gun

  • Wrenches - Metric

  • 7mm Wrench

4.33/ 5.0
6 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Worked fine
The upper ball joint didnt have grease fittings, like the ones I replaced.
October 30, 2017
Ball joints
My ball joint went in no problem, excellent quality.
April 3, 2018
Ball Joints
Good quality and great price. They fit just fine. They were what I expected.
June 2, 2018
Cherokee ball joints
After Meineke quoted me almost $800 to replace 4 ball joints, I decided to give it a go myself. I ordered the ball joints and both front hubs/ bearings for less than $100. Watched 1A’s how-to video and got to work. Using the ball joint press which I rented wasn’t all that easy, but I got it done. Since no instructions came with the parts, I wasn’t sure what to do with the spacers (?) on the lower ball joint stems. Finally got them off with a screwdriver and discarded them. Happy with the quality of the parts and the end result.
July 15, 2018
working on installing them now, I have one side done.
I am rather neutral about these. First thing I noticed is that there are no grease fittings. I found that the lower ball joint will not allow you to remove the rubber boot to press it into the knuckle. This caused the boot to be pinched by the cylinder of the press. The provided E-ring will not install because the groove for the E-ring is slightly below the knuckle. I dont know how these will perform. I with they had grease fittings and that the boot did not get damaged. To remove the old ball joints and install these I had to use a 4ft cheater bar so this job was more difficult than I am used to. The second side is going easier than the first.
July 18, 2018
Totally satisfied
Quick shipping (which is always a plus), easy to follow instructions and easy to install parts. Excellent price for a quility part.
November 13, 2018
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
This says 4 pc set in the title but the descript says 1 upper and 1 do all 4 ball joints will I need to order 2 of these sets?
Les M March 8, 2017
We apologize for the confusion. You will require only 1 set of this to complete both upper and lower ball joints on both sides.
Alex P March 8, 2017
who manufactures this part?
Bryan B July 31, 2017
I dont remember there being any definitive markings or branding. That being said my local mechanic tried to push on a Moog branded part which cost significantly more. To be honest, on my jeep, the driver side has Moog, and the passenger side has the 1a auto branded. And so far no issues, its been a few thousand miles since I installed.
Santosh H July 31, 2017
Not sure on the manufacture of the ball joint but on put them on my 1998 jeep cherokee and havent had a problem with them. Its been two years and Im pretty hard on my jeep and there still holding out real well no issues with them yet. I hope this helps you can always call A1 to find out who manufactures the parts your looking for.
Mathew S July 31, 2017
I dont really know who made them.They work fine in my 93 grand cherokee, came with grease fittings and plugs for lowers.For the price I was able to replace all uppers and lowers.Im hard on my jeep and theyre working fine.Hope this helps.
Clyde P July 31, 2017
These are our 1A Auto brand parts, and built to meet or exceed OE specifications.
Alex P July 31, 2017
Is there a difference between the two wheel drive and 4 wheel drive on the ball joints on a 98 Grand Cherokee Laredo?
John R August 20, 2018
This kit is only listed to fit: Jeep Grand Cherokee 4 Wheel Drive Front Upper & Lower Ball Joint 4 Piece Set
Peter M August 20, 2018
Year Make Model Description
1990-2001Jeep Cherokee Jeep Cherokee 4 Wheel Drive Front Upper & Lower Ball Joint 4 Piece Set
1990-1992Jeep Comanche (MJ) Jeep Comanche (MJ) 4 Wheel Drive Front Upper & Lower Ball Joint 4 Piece Set
1993-1998Jeep Grand Cherokee Jeep Grand Cherokee 4 Wheel Drive Front Upper & Lower Ball Joint 4 Piece Set
1993Jeep Grand Wagoneer Jeep Grand Wagoneer 4 Wheel Drive Front Upper & Lower Ball Joint 4 Piece Set
1990Jeep Wagoneer Jeep Wagoneer 4 Wheel Drive Front Upper & Lower Ball Joint 4 Piece Set
1990-1995Jeep Wrangler Jeep Wrangler 4 Wheel Drive Front Upper & Lower Ball Joint 4 Piece Set
1997-2006Jeep Wrangler Jeep Wrangler Front Upper & Lower Ball Joint 4 Piece Set
Part #: 1ASBS00027

Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(19:35 min)