Heavy Duty Replacement Ball Joints | Jeep Comanche MJ/Wrangler TJ/Wrangler UnlimitedProduct Overview Title: Heavy Duty Replacement Ball Joints Jeep Comanche MJ Wrangler TJ Wrangler Unlimited Heavy Duty. Ball joints are a common wear item on any Jeep that can produce vibrations, steering wander or even clunking noises. When installing a lift kit on your Jeep it's a great time to replace the weak factory ball joints with a heavy duty joint that is designed to handle the additional stresses of oversize tires. Rough Country's replacement