I bought a used 3:73 low miles gearset installed in an 8.8 1989 fox rear to rebuild for my Daily driver.Carrier bearing has pits so i will replace them.The supposedly new pinion bearings are turning at 15 in lbs rotational torque but the initial force required to turn the pinion flange takes two hands to get it to start to rotate.The feel of the bearings are kind of bumpy when rotating the pinion flange.Should I replace them or is this normal?Was told 300 miles total on the gearset and pinion bearings.Also, I have some axles with surface rust on the bearing surface,I polished out with emery cloth. no pitting or grooving ,can I run these without failure?