[Neeks760]

When I start up the car I hear a weird clunk sound. It only does it about 50% of the time but I find that mostly when the engine is hot. Anyone else have this issue?

 

[ChallyTatum]

Where does the clunk sound like it's coming from...front or rear of the car?

 

[Neeks760]

Front. Almost like when my old car would shift into drive you could feel it.

 

[ChallyTatum]

You sure it's not pre-detonation? Hot engine and low octane can cause the this. BTW there was a TSB late last year where the PCM calibration was updated to avoid knock during acceleration on the SXT. I would check to see if this update has been done on your challenger if not would be good to get the latest calibration.

 

[Neeks760]

Wow, I really appreciate your help. Maybe just using premium gas will help avoid this you think? I will hit up the dealership and ask them about that as well. Sorry I am new to all of this. Will pre detonation cause further issues?

 

[A Guy]

Seems to be a V6 problem, although I've never heard it myself

Intermittent Thump/Whump from Underneath/Rear on Car at...

All, I am moving this discussion from another ChallengerTalk thread and starting its own new thread here. To continue: I have a 2019 Charger SXT (basically same a Challenger and 300). I bought it new last April, and since my first weekend of ownership, there has been a loud “THUMP" or "WHUMP"...

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A Guy

 

[Neeks760]

Mine sounds like it’s in the front. Like transmission clunk