ok, but wouldn't that happen all of the time? at idle and normal driving?

in my case, the noise makes quite a racket, at the 2100+ rpm point.

i'm stomped.

4.2 '87 yj, 263,000 miles, mopar mpi, 33" mud bfg, skyjacker 4", 3.73 gears, arb lockers-f and r., tom wood's 2.07 shaft conversion, tom wood's hd driveshaft, magnaflow/custom exhaust, 4wd bumper/swing-out tire carrier