2004 V70T howling sound after TB change

[jimv]

Picked up my car from shop where I had water pump, timing belt, serp belt and all tensioners changed. In addition, had pcv sys cleaned and replaced a few parts. Now when I accelerate to around 1800 to 2300, I hear a howling sound like a bearing. I assumed it might be from AC, alternator or PS pump, but I cannot duplicate when its in neutral or park and rev to this rpm range--only if its in drive AND when im going down the road at this range and I hear the howl, I'll move to neutral, hold the rpms at say 2,000 and the howl stops. Back to drive and comes back! I checked trans fluid and its right on the mark. I'm lost. Any help or thoughts are appreciated. Thanks in advance, Jim.

[Blakester]

Without hearing the howling no one can know for sure.. My guess, just from experience, would be that you have a loose intercooler hose or your turbo is on the way out. Check your intercooler hoses and if they're loose tighten them up. My volvo made a howling noise under similar circumstances and our turbo was failing/failed 20 minutes later when we tightened the intercooler hoses.

Good luck! It was an $1100 fix.