So I purchased a 1998 STS this fall. New engine, new wheels, suspension and breaks. However, towards the ends of winter I noticed a whine when I started the engine. The whine is most prevalent at around 1,200-1,900 rpm. At around 2,000 rpm it seems to quiet down or disappear. The transmission is working properly, I was thinking it could be the power steering pump. When I go to put the car in drive it seems very hard to turn in either direction (eventually when it is a bit warmer it is easy to turn). I was also thinking it could be the idler pully. Any thoughts would be greatly appreciated, other than the annoying sound the car runs and drives wonderfully.