I have a 97 Trans Sport with 125K miles. Started getting a growling noise that sounded like it was coming from under my drivers side floor panel after about 100K.

I have replaced CV axles and wheel hubs but still the same noise. Seems to happen when I start moving from standing still. Any ideas?

Wheel bearing? ABS sensor (I had mine come apart causing a similar noise)?

Problem ended up being a stuck caliper. The piston would not retract right away and eventually would pop back. Replacing the caliper did the trick.