I have a 2001 f150 4x4 with about 25k miles on it. When I turn the wheels left or right and give it gas I feel a little "grind" (feels like tires are rubbing but they are not). I am wondering if I have already worn out the CV joint(s). The T-bars have been cranked to level the truck (but only 2 or so turns - the angle doesn't look too extreme). If this is the problem, what is the aporximate cost for replacement? Bonus question: Are there heavy-duty replacements?

Thanks.

:Walkman