Some new info; it appears this clicking goes away at higher ambient temperatues, makes noise at 70F, not at 90F.

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1985 Mercedes-Benz 300 SD 309k miles
2003 Mercury Marauder 300B Blue
2006 GMC 2500HD Crew Cab/8' Bed; 21.5' long
2002 Pontiac Bonneville SLE

Have you jacked up the car and spun that wheel by hand?

Mike

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra