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Lets hear some of you all’s or commonly known 6.4L challenger problems or issues. Just curious to see what is y’alls experience with issues in this car.
Common 6.4L issues
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Nada, zero
Mopar or No Car
Mopar or No Car
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Trunk isn't sealed up real well. Water will come in through the trunk line, run down the body and into through the taillight seal into the trunk well...where the battery and subwoofer etc...reside. It's a relatively "dirty" engine as well so a catch can will capture and condense nasty oil vapor so it can be emptied out rather than burned. Not really a "problem" but an issue for sure. Other than that...haven't had any "problems" in 9k mi worth of life out of mine.
I'd say the biggest issue is the rear tires usually wear prematurely. 
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2,764 Posts
My engine sounds too good, which makes me want to step on the gas pedal more, resulting in poor fuel economy.
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39 Posts
Classic ?
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39 Posts
Also heard that 6.4 auto transmission sometimes has problems like rough shifting. Is that true? I assume its normal for it to shift less smooth as it ages but i want to know if its a reoccuring problem.
I have seen some TSBs where the PCM/TCM were reflashed to improve drivability on the older models. Probably not an issue with the newer models as the usually get the latest and greatest calibrations.
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19,370 Posts
Same A8 used for 5.7L and 6.4L and overall seem to be reliable.
The 6-month oil changes to keep your warranty is a hassle but really it's a been a good engine.
My 16 has over 20K miles and will be 4 years old next month and not a single issue.
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The 6-month oil changes to keep your warranty is a hassle but really it's a been a good engine.
My 16 has over 20K miles and will be 4 years old next month and not a single issue.
Sent from my SM-N960U using Tapatalk
Remote start?
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39 Posts
many thanks to you
I’ll stop short of calling it “common”, but the Hemi’s propensity for eating camshaft lobes (after corresponding lifter failure) is a known thing.
The failure rates are definitely skewed more toward the 5.7L Hemi engines, but this failure has occurred with the 6.4L Hemi also, so it’s not immune by any means.
The failure rates are definitely skewed more toward the 5.7L Hemi engines, but this failure has occurred with the 6.4L Hemi also, so it’s not immune by any means.
As i said, even with proper precautions. Maybe if i waited through 2-3 Remote start cycles but im not letting it idle that long.
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39 Posts
Honestly, a lot of the problems i hear from people on challengers are almost always for the RT and ive never seen anything like that on a 6.4L. Only thing ive seen happen is a friend of mine had a 80k mile scat pack and the transmission would shift pretty rough at times. Normal acceleration and normal driving, everything street mode and nothing really tuned. Still the A8 is a great transmission and I kinda wanna save a little fuel with MDS
There are a couple here with 6.4s that have had cam/lift failures with both automatic (MDS lifters) and manual trans.
I received this TSB, and it really improved the 1-2 shifting. It used to get some resistance and sort of "clunk" to and from a stop. It wouldn't make any clunky sounds, but it definitely felt like it wasn't shifting properly. I doubt it did any damage.
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