alright, my car is making this noise at about 3500-4000rpm and it reminds me of a supercharger whine. it doesn't make the noise in nuetral only in gear so i can not replicate the problem while under the car. it hasn't affected performance yet, but i would like to figure out what it is and possibly fix it before it does affect performance. i was thinking it was an exhaust leak but wouldn't that make the noise in neutral also.

 

How many miles on the car?

 

96,000 well taken care of miles.

 

i also just changed the tranny fluid to redline mt-90 thinking that might clear it up and changed the oil to GC and the noise is still present, i did notice the flex portion of the y-pipe has been torn so it could be an exhaust leak, but it doesn't make the noise in neutral.

 

bump.. for advice as to what to check next.

 

Sounds like a vacum leak possibly

 

It may not make the noise in neutral cuz of no load on engine. Maybe if u put load on motor it then creates backpressure to the point of making noise. Also, is it a whine or a whistle. Whine could mean power steering, overly tight belts and other problems. WHistle could mean exhaust leak or vacuum leak.