Hang in..I'm merely the fastest on the scene at the moment. Many others will post information and suggestions. Hopefully they are more helpful than I was.

My guess is the secondary air injection pump. Does it only happen when the engine is first started and the engine is cold? the air pump runs for 1-2 minutes when the engine is cold. When they start to fail they make a sound similar to what you're describing. Some have described it similar to a hellicopter engine speeding up. (obviously much quieter though.)

I'm sticking with my original assessment of the transmission being the problem. There just aren't that many things other than the transmission that is in the area you described. (Unless the intake tube itself has a hole in it.) Have the fluid changed, and the proper level maintained and see if that helps. Most Bonnevilles don't have the secondary air injection pump. Nate, what vehicle are we talking about here - could you add that information into your profile?

My Cutlass had a high pitched wine, but it was the alternator.

My 99 has a high pitched whine as well. One Saturday I spent hours trying figure out what the issue was....come to find out it'* my frig'n Gatorback serpentine belt. The way the belt was designed causes them to whistle/whine.

What brand of belts are you running?

ok well when I start the car the whine is there right away and it doesn't go away at all until I turn the car off. It gets louder as I rev the car and as I drive the car. Someone told me I possibly could have thinned the transmission fluid to much when I put the sea foam in and cleaned it so well that the filter is clogging up. I have no clue. It didn't start whining until about 2 days after I put the fluid in. Also another question. Ever since I bought my car the oil psi is always at 120. The highest it reads. Is this normal too or is that to much pressure?? I have had my car for over a year now and it seems fine. Anyone know about that?

The oil pressure problem is likely a defective oil pressure sender, a fairly common failure. Your whine is coming from the drivers side of the vehicle, correct? Have you done anything with the PCV valve?

yes it'* coming from the drivers side and no I haven't done anything with the pcv valve. Do you not think it'* the transmission now?? I changing the filter and fluid no matter what but are you having other thoughts??

My thought is either converter or drivechain in the transaxle. The converter is probably starting to go and fluid is not circulating properly through it causing it to have a low fluid symptom. This causes the overall pressure in the trans to drop which causes the PCM to kick up the pressure which makes your shifts feel harder.

There is a diag port at the top of the transaxle. I would have pressure checked and I woudl also have the car scanned for tranny codes (won't show up on most normal hand held scanner, especially if they are ones that don't set the SES light).

Not really a change of thought. I'm still leaning toward the transmission, as Rogue pointed out. Just trying to cover all bases. Some who have changed the PCV valve and not replaced the O-ring properly have experienced a whistle from vacuum being built up in the crankcase.