LOUD NOISE WAS NOT REAR WHEEL BEARINGS BUT REAR DIFFERENTIAL (VERIFIED BY MY TRUSTY INDEPENDENT MECHANIC)L. NEW REAR DIFFERENTIAL PUT IN BY SUBARU MECHANICS. 350 MILES LATER, HEARD A SOFT "POP...POP". IN REAR VIEW MIRROR SAW WHITE SMOKE. STOPPED AT ONCE. CAR BEHIND SAID THERE WAS FIRE UNDERNEATH. LOCAL FIRE DEPARTMENT PUT OUT FIRE. JUST ABOUT ALL INFORMED OF PROBLEM SAY IT WAS THE REAR DIFFERENTIAL THAT FAILED ESPECIALLY AFTER REAR DIFFERENTIAL EXAMINED AT ANOTHER SUBARU DEALER. LOCAL SUBARU DEALER DENIES IT IS THEIR FAULT. NOTE: MODEL NUMBER ON REGISTRATION IS: UK3 (NOT WHAT I CLICKED ON-WASN'T GIVEN A CHOICE). *TR