Rear drivetrain noise above 30mph
I need some help tracking down what I think is a bearing noise from either my Dana 300 or the AMC 20.
In two WD 30mph and above, under load, meaning when I'm on the gas I am getting what almost sounds like tire whine (Bearing noise?). It goes away in 4 lock or when coasting. It gets louder the faster I go. I removed the rear driveshaft and took a drive in 4 lock and it is quiet.
I had the Txfer case out when I rebuilt the T177 a few weeks ago and could not feel anything funky in the bearings. I have new universals on the rear driveshaft. I lifted the rear and cannot feel or hear anything in the rear axle.
Anybody have any tips on isolating noises between the output of the Dana 300 from the rear axle?