Hey fellas.

I am completely stumped...
I have a 04 4.7 and everytime when I give it all its got when I get close to 5k rpms I hear a high pitched whine that gets louder as the rpms go higher until it shifts. The whine is louder than my exhaust and I dont have a aftermarket cai or turbo. (I wish) But can anyone explain this noise and how I could maybe get rid of it?
Thanks

 

where is the sound coming from? engine, tranny, rear diff? a whine could possibly come from a number of different places.

 

oh my bad for not clarifing...Im almost positive its from the engine.

 

check ur pulleys or power steering pump! mine was idler pulley

 

maybe the rear end going? how many miles? stock?

 

just got over 100k bout a week ago. somewhere around 100,250 if I can remember correctly. Superchip is the only thing performance wise ive done. and single magnaflow exhaust

 

Ya got a free supercharger LOL LOL LOL.
Sorry....just had too do that lol.
Yes, it could be a belt slipping?
Al.

 

Ill go check it all out today. and ill look for my hidden supercharger while im at it
Thanks for the help guys.

 

Why not have someone rev the engine while you listen under the hood. If you do not hear it then, it's a drive line problem. I have had two situations that caused a whine. The frist was the power steering pump. The power steering cooler rusted through causing a pin hole leak. Never saw a drip unit I investigated why I was low on AFT4+. The bearing went out on my alternator at 59K this spring. These wide belts are hard on bearings.

 

Something on the front belt drive would be my guess. As stated above power steering pump / alternator but it not that try the fan clutch. When they go bad they scream.
Good luck, strange noises are hard to pin down