OK next problem, or maybe it isn't a problem at all? Cruising on the highway I can hear a quiet noise from the rear of the car. It doesn't change at all when I accelerate or decelerate. Sort of sounds like the tires. Or is a little tire like noise normal? I suppose I should rotate the tires and check the gear lube. On the front drive, is the gear lube the same with the standard shift transmission or is it separate? The tranny was rebuilt about 5,000 miles ago (and a new clutch).
Is there anything else in the drive train that I need to check gear lube? I'm a newbie to all wheel drive, is there a front to rear differential in addition to the front and rear differentials.