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| General Discussion Discuss all topics relating to the Scion tC. |
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Tue., Jan 29, 2008
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What's Normal, What's Not?
Just got my new 08 tC and loving it. Question: The transmission whines noticeably in 1st & 2nd on acceleration. It increases in pitch until the sound pretty much becomes inaudible. I haven't found anything in this forum but in another they say that they think it's normal. What's the general take on this? Also, are there any other "normal" quirks that a Scion noobie should know about other than what's already been posted?     
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Tue., Jan 29, 2008
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Hmm.... The only time I hear a "whine" is when I down shift, and I dont take my foot off the clutch. I know that is normal...just things trying to get caught up and getting ready to go into gear.
Are you flooring it, or driving like a normal person...and how many miles do you have on it?
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Tue., Jan 29, 2008
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I just found this...
1. when i accelerate, i hear a whistle noise coming from the tC engine. is this normal? yes, this is completely normal. this is the sound of air as it makes its way through the air intake/throttle body in your engine as you accelerate. it makes more of a whistle/high pitched sound than most cars because of how the stock intack/throttle body was designed. it's speculated that scion designed them like this on purpose to try and replicate the sound of what a cai (cold air intake) makes when accelerating. I got it from here... the scion tC faq site
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Tue., Jan 29, 2008
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I have about 780 miles on the OD. I've been pretty much babying it. Most of my shifts have been fairly leisurely at around 3K RPM. At least until I hit 1K miles. I didn't really notice the noise until I ahem turned down the stereo.
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Wed., Jan 30, 2008
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Normal?
I have my 06 since it had about 250 miles on it and it has always made that noise. I think it has to do with the way the gearing ratios are setup. The RPM's seem high for the gears, almost like there should be a 6th.
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K. Hickman H.Series Performance "Designs With tC in Mind" http://img507.imageshack.us/img507/3...4eed0f3ll2.jpg
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Wed., Jan 30, 2008
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my 08 makes the same noise i was going to ask the dealer but i guess it is normal
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Thu., Jan 31, 2008
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Gear ratios and the way the gears are cut.
 Helical cut gears have tight tolerances but rather noisy compared to straight cut gears.
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How Fast Was I Going? 
Last edited by navylife59; Fri., Feb 01, 2008 at 05:23 PM.
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