I've have a 2000 F350, And have hade problems with the lock outs and U-joints sticking causing expensive repair to the spindle gears and replacements of same. This has happened two years in a row. What happens is the lockout or u-joints stick causing the axle to freeze up.It also happens after the 12,000 mile warranty on the work is up.But two years in a row now. Is there anybody else having problems like this? I'm in contact with Ford customer relations and hopefully will get some of the money back.But am not looking forward to a $1000.00 plus bill next year.