Thread: Hissing sound from passenger side vent?
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Old 01-05-2016, 05:08 PM
toomany MBZ's Avatar
toomany MBZ toomany MBZ is offline
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Location: central Va
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Remove the kick panel on the passenger side, start the car and listen for the sound, you should be able to find it.

This may take away enough vacuum to affect the transmission.
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