1. Lots of things can cause accelerated wear of ball joints, including
balancing issues, bent rims, etc. So check all that stuff out first.
2. Depending on what model car it is, you may want to avoid the chain stores
altogether and get an OEM part.
3. If it doesn't come pre-greased, grease it with the red Mobil 1 stuff first.
Even if it does come pre-greased, my inclination is to clean it and regrease
it before installing.
What does the bad one look like? Wear is even or not?
"C'est un Nagra. C'est suisse, et tres, tres precis."
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