Ryandigi Posted January 28, 2009 Share Posted January 28, 2009 I have a catless downpipe and sti uppipe and just assumed that the very high-pitched noise was from the turbo whine being more audible. Well today I had no music on and was going 40mph in 4rth gear and decided to give 4rth a rest and shifted into 5th. Once in fifth going the same speed I hear the turbo-like high pitched whine start. I would lift the gas and gas it and it would remain there but would change pitch slightly. 26k and never changed the transmission or diff fluid (waiting until it gets warmer). Any ideas? Link to comment Share on other sites More sharing options...
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