I have not had a rear torque arm installed lately. I'm thinking that it might be a rear pinion seal on the end of the driveshaft. Thanks for the help though, guys. My car just recently hit 116,000 miles.
To date: 1 new opti spark (2 yrs ago), 1 water pump gasket (2 yrs ago), 2 rebuilt tranny's (1 from driving it hard, 1 from the Hayden tranny cooler being hooked up wrong - oops), 1 window motor (2 weeks ago), 1 regulator (2 weeks ago), 1 window (2 weeks ago), 1 starter (2 weeks ago), 1 fuel pump (2 weeks ago)