I have a noise from the rear drive axle on my AWD Astro. It's a limited slip
diff. I changed the fluid with synthetic and didn't see anything and the old
fluid wasn't that bad. It sounds like a bearing noise, changes with speed
and sounds the same when turning.It makes the same noise if I raise the
wheels off the ground. My suspicion is a carrier bearing, but don't know how
to tell. If it is, how difficult is it to replace? Is it pressed in? Thanks
for any advice.