Hot Rear Axle on standard 3.8L
I just had the pinion bearings and the rear axle bearings replaced by a professional shop on my rear axle last week. I inspected the new bearings and the pinion gear and it looked to be in good shape.
I am still having a howling noise coming from rear end. Further more, today I tested the temperature of the differential compared to the axle housing and rear brakes. The temperature difference was 70 deg hotter at the pinion area than the housing and the brake drums. The temperature was in excess of 170F compared to 100F. Ambient air temperature is 45 deg F. BTW, the manual transmission housing was around 100 deg F.
Is there a break-in period? What should be my next steps to solve this problem...I assume I have one.