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Q: Ball joints

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How do you know which ones to replace? Im pretty sure it's the front but unsure if upper or lower.

My car has 120000 miles.
My car has an automatic transmission.

Hello. The lower joint carries most of the load and wears out first, but both upper and lower will have wear and may both need to be replaced. If you jack up the front end and support from under the lower control arm and then move wheel in and out on bottom and top to check both joints. If you need help with this, a certified technician from YourMechanic can replace the faulty ball joints for you.

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