if you have a chance to check your rear diff flange for up-down/side-side play with the driveshaft removed, you should take it. common for a loose pinion bearing to growl during decal...you can tighten it up to buy some time, but not too much or you just make the clock move faster... I totally understand robbing peter to pay paul; ketchup ain't just a condiment for so many of us...keep doing what you can.