Stuck wheel

I recently rotated the tires on my Galant, fwd, and twice, the passenger side front wheel seemed to seize on the hub/rotor. What causes this to happen and how can I prevent it?

Corrosion! You should see what we have to due sometimes to get the wheels off a car after a Minnesota winter or two. Clean the corrosion of the hub and wheel everywhere they make contact. Then apply a very thin amount of grease to the wheel over the same areas you just cleaned. The wheel should fall off with no problems the next time you rotate the tires.

Thanks for the tip.