In areas where it is cold if there is any moisture in the ball joints they can freeeze and cause moaning or rumbling. If this is the case it can often be solved by using a needle fitting on a grease gun to squirt grease into the boot. If the boot is cracked and the ball joint not loose a new boot can be installed.

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.