2000 pontiac trans am makes a popping noise when s

**edrvsqz1980** · 05-25-2009, 04:37 PM

2000 pontiac trans am makes a popping noise when shifting gears i noticed it does it when its been sitting overnight or has been sitting sitting for a couple of hours but is fine when it is warmed up just wondering what it could be because the noise is annoying really appreciate it if someone could help me thanks everyone

**playWS6station** · 05-25-2009, 06:04 PM

Mine popped and and I felt something hitting under the center console. Turned out it was a broken transmission mount. When I shifted hard at High rpms or mids it would do that. Check it out.

**Wesman** · 05-25-2009, 06:14 PM

Does the shifter jump around when you hear the popping noise??

Could be a broken transmission mount. If the mount is completely broken, the shifter will tend to jump up and down when you shift.

**edrvsqz1980** · 05-25-2009, 08:07 PM

No nothing moves when i hear the popping noise it sounds like its coming out of the exhaust to me but the popping i only hear when i take off first thing in the morning or its been resting for a couple of hours after it warms up i dont hear anything after that.

**nillam1** · 05-25-2009, 08:13 PM

Originally Posted by edrvsqz1980

No nothing moves when i hear the popping noise it sounds like its coming out of the exhaust to me but the popping i only hear when i take off first thing in the morning or its been resting for a couple of hours after it warms up i dont hear anything after that.

You mean regular shifting or power shifting? If it is power shifting you could be hitting your rev limiter.

**edrvsqz1980** · 05-25-2009, 08:15 PM

regular shifting usually just 1st and 2nd after that the noise is usually gone

**0rion** · 05-25-2009, 09:38 PM

sounds like you're describing the exhaust popping which is normal with free flowing exhaust. Do you have an aftermarket catback?

**basballny2** · 05-25-2009, 09:55 PM

i know what "poping" noise your talking about, my car does the same thing, its just the regular noises of our cars.

**wildmann_87** · 05-25-2009, 11:51 PM

i believe its jst a normal thing with cars like ours, because mines does the same thing until its warmed up. i think it has sumthing to do with unburned gas fumes that are hot hitting the oxygen mollicules in the air and combusting... i could be wrong though

**basballny2** · 05-26-2009, 09:15 AM

mine sounds like it comes from the rear, its been doing it since i got the car 2 years ago, car only has 20k miles on it

**edrvsqz1980** · 05-26-2009, 03:13 PM

yes i believe it does have an aftermarket exhaust not sure what brand but everyone says its normal dont know anyone who has a car like mine but thanks everyone for the advise