Auto tensioner noise?
 

What does a failing auto tensioner sound like? The previous owner had my autotensioner replaced at 58k because of a "strange sound around 2,000 rpm". I am now at 114k and I am hearing a strange growling sound around 2-3k and on deceleration. When I push in the clutch and let the rpm's drop (like when I'm stopping) I hear it the most. The timing belt should be good for at least 40k so I don't want to replace everything if it can be avoided. Is this what a bad tensioner sounds like? What are the consequences of ignoring it? As long as I have a decent load on the engine I never hear anything, it's only on light load/engine decel. Could it be something else altogether like a power steering belt?