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12/02/2023 1:36 pm
Topic starter
09 Towncar, 70K miles. When at idle or low RPM, there is an odd hissing noise that comes from directly in front of the drivers seat, towards the dashboard. It only hisses when in drive, not any of the other gears. It also goes away at higher RPM's, and isn't affected by any climate control or any other thing that seems like it would cause the noise. Anyone got an idea of why this could be happening?
2 Answers
1
12/02/2023 1:54 pm
vacuum leak
Are vacuum leaks affected by only being in drive? Idling in park or neutral does nothing, only in drive
try first gear, reverse, second gear, might be pump or converter
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13/02/2023 3:18 pm
Idling in park or neutral does nothing, only in drive
that'll be transmission then