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I don't have a Pacifica but I had exactly this problem on my 2001 VW Passat: coasting and easily getting on throttle caused a grinding sound from the engine. That turned out to be a partially blocked passage for the valve timing adjustment actuator, which is triggered when you go off-idle. Essentially I think the timing chain rattled for a second because the oil pressure driven actuator wouldn't move from one position to the other solidly. It was impossible to get the service technicians to troubleshoot until we realized that if you easily got on the throttle and let the clutch out with the parking brake on, it would do it (it was a manual.)

The V6 in the Pacifica may be totally different in its valve timing actuation, so it's probably not the same cause, but the troubleshooting technique might help. I don't know if it'll let you get on the gas lightly with the parking brake on and the hood open, but try doing that and see if the sound happens.
 

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It's been a while since the last post. Did anyone get this issue resolved? I have the same issue and the dealership cannot figure out the source of the noise. Need to know if I should sink more money into diagnosis or just let it be. Did anyone have theirs fixed or have their transmission fail catastrophically because they left it? Any updates will be super helpful.
 

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Our van continues to make the noise but as of yet has not had any performance issues severe enough to warrant a trip to the dealer. I wouldn’t shy from it either because I bought an extended warranty, but basically to this point the noise hasn’t gotten any worse or created any issues for us. Our tranny does funny things at various speeds but never any severe jerks.
 

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It's been a while since the last post. Did anyone get this issue resolved? I have the same issue and the dealership cannot figure out the source of the noise. Need to know if I should sink more money into diagnosis or just let it be. Did anyone have theirs fixed or have their transmission fail catastrophically because they left it? Any updates will be super helpful.
I began by reaching out to @ChryslerCares who advised that there was a TSB that they thought could be related. I first took my vehicle in to a Chrysler "Customer First" dealer in October 2019. I don't think that they even drove it, they updated some things per the TSB and gave the vehicle back to me. I returned to the dealer in November and they rode along with me and we were able to easily reproduce the noise and they spent over an hour trying to diagnose where it was coming from without success. My bumper to bumper warranty was expired but the power train was (and still is) under warranty. They said they could schedule another diagnostics visit where they would hook up chassis ears, but if they diagnose it to be something that is not under warranty that they would have to charge me for their time.

This is the point where I began to ponder the same question as you... I ultimately decided to escalate the issue with Chrysler (which in my case turned out to be counterproductive) and I was able to schedule the dealership to perform their diagnostics at the same time they did warranty work to repair the bubbled paint on the hood in December. They had the van for several days due to the repair, so I had a loaner Pacifica at the time (about 10k miles, no clunking). They were able to verify that the noise was in the transmission (duh) and spoke to Chrysler about it. The outcome was:
CALLED TECH SUPPORT, THEY ARE AWARE OF NOISE. ENGINEERING SAYS IT IS NOT A QUALITY ISSUE AND IT IS COMING IN AROUND 30K
NOW OPERATING AS DESIGNED
During a phone conversation I had with the service manager I think he conveyed that Chrysler said that the sound would return in another 30K miles even if the transmission was repaired/replaced. So in answer to your question, I wouldn't invest much time/money in trying to get this diagnosed, because it's unlikely that Chrysler will honor their warranty on it unless the vehicle is throwing error codes.

Maybe the most frustrating thing to me is that I was not experiencing any hard shifting in over 3 years with this vehicle until after that first trip in October. I now experience that from time to time and the Chrysler "Case Specialist" said that I could either have the dealer try to replicate it (yeah right) or close the case. If I chose to take it to the dealer, I would again be responsible for any time they spent diagnosing it if it didn't turn out to be warrantable and I would be responsible for the cost of a rental vehicle less $35/day that Chrysler would reimburse. As a rental minivan is about $100/day, that didn't seem very reasonable and the case specialist ultimately closed the case without my authorization.

I've spoken to the dealership about the hard shifting and they have said that other people are complaining about it as well. It is not limited to the 2017 model year, and Chrysler does not have a fix except to reset adaptations. Since I had seen several reports of a new valve body fixing this issue on the forums, I asked them for an estimate to replace the valve body, but they declined to provide one. I have a hunch that replacing the valve body would be the "fix" but for how long? Maybe only 30K miles... If you find the right Chrysler mechanic, you may be able to get them to do it under warranty, but I suspect that Chrysler doesn't want to open this can of worms by admitting the fault and paying to fix all of them.

I purchased this vehicle with the expectation of having it 10+ years, so I will definitely provide an update between now and 2026-2027 if there are any significant changes with the transmission while I have it. Based on my experiences with Chrysler vehicles, I haven't fully decided if I would consider them for my next vehicle (assuming they are still around). I should also say that I have no beef with the dealer who has been looking at it. It is not even the dealership I bought it from, but they have been very accommodating and haven't charged me anything (yet).
 

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I've noticed this very noise and it's always drove me nuts. I can only hear it with the radio off, driving around 30-40 mph and "feathering" the gas - a slight grinding/kachunking sound from the drivers side engine bay.

I happened to notice what I think is the same sound when putting the car from park to drive and vice versa. I had my wife do that repeatedly while I observed in the engine bay, and the sound is coming from the shift lever/cable assembly on the transmission.

That seems fine and normal, but why would it be doing that when in drive and letting off the gas? Does the car shift into neutral at low speeds to improve mpg or something? I'm tempted to mount a camera in there and record while driving to see exactly what's happening..
 

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It sounds like I should just leave it. I guess it's slightly reassuring to hear that the sound hasn't gotten worse for you guys and the transmission hasn't... blown up?...If there ever was a class action lawsuit or recall or TSB or miracle, at least I have documentation that I experienced the issue before my powertrain warranty was up. Also, I was driving uphill (not very steep but still decent uphill) and I definitely heard the noise at around 75km/h (around 45mph?).

I feel the same about ever buying another Chrysler in the future. We bought a Jeep a few years ago and only had one major issue that was fixed under warranty. No issues since and very happy overall. The car feels solid. This Chrysler on the other hand has been a little disappointing. Also definitely doesn't feel as solid as the Jeep (GC 2014) but maybe that's not a fair comparison?

Will keep people posted if my transmission blows up...hopefully the van will last the 10 years that I'm hoping for.
 

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I've noticed this very noise and it's always drove me nuts. I can only hear it with the radio off, driving around 30-40 mph and "feathering" the gas - a slight grinding/kachunking sound from the drivers side engine bay.

I happened to notice what I think is the same sound when putting the car from park to drive and vice versa. I had my wife do that repeatedly while I observed in the engine bay, and the sound is coming from the shift lever/cable assembly on the transmission.

That seems fine and normal, but why would it be doing that when in drive and letting off the gas? Does the car shift into neutral at low speeds to improve mpg or something? I'm tempted to mount a camera in there and record while driving to see exactly what's happening..
I had suspected something like that (shifting into neutral when lift off gas) but it doesn't make sense why it would only happen at certain speeds? Is there such a thing as a loose timing chain that could cause this issue?
 

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Just bought 2017 limited w 44K miles. Super nice van, but I just noticed this clicking issue, which extremely annoying. Not to mention, it also makes a whining noise at high speed, which is another thread on the board that I am participating in. Both issues are the same resolution from Chrysler, which is "it's fine, just be annoyed and don't worry about it". I am pretty disappointed.
 

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I've noticed this very noise and it's always drove me nuts. I can only hear it with the radio off, driving around 30-40 mph and "feathering" the gas - a slight grinding/kachunking sound from the drivers side engine bay.

I happened to notice what I think is the same sound when putting the car from park to drive and vice versa. I had my wife do that repeatedly while I observed in the engine bay, and the sound is coming from the shift lever/cable assembly on the transmission.

That seems fine and normal, but why would it be doing that when in drive and letting off the gas? Does the car shift into neutral at low speeds to improve mpg or something? I'm tempted to mount a camera in there and record while driving to see exactly what's happening..
YES!! You described it perfectly! We just bought a 2017 with 31k miles and same thing. We have taken it to two mechanics. They hear it, don’t know what it is. No codes are coming up. What ever came of yours? I’m a little nervous.
 

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Anybody’s transmission go out yet? 😬 Or any other major issues? What came of this sound in your vans? We just bought a 2017 with 31k miles. Two mechanics hear it but don’t know what it is. No codes are coming up.
 

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Our 2017 van still makes this noise. We are at 37,800 miles currently. Never had a breakdown or any sort of repairs for the transmission or drivetrain components, so hopefully this noise is not going to lead to a failure of some kind.
I have noted that I can hear the noise at higher speeds as well if I am on a sufficiently quiet road with no other noises to mask it.
Also almost forgot to mention that I can hear the inverse noise upon releasing the gas pedal again. It’s like an engaging noise and a disengaging noise going on. Even if it isn’t a major mechanical concern it certainly sounds like some sloppy operation is going on.
 

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Our 2017 van still makes this noise. We are at 37,800 miles currently. Never had a breakdown or any sort of repairs for the transmission or drivetrain components, so hopefully this noise is not going to lead to a failure of some kind.
I have noted that I can hear the noise at higher speeds as well if I am on a sufficiently quiet road with no other noises to mask it.
Thanks for replying. Glad nothing has happened so far! Let me know if you find out anything else.
 

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Anyone have any luck resolving this issue? My 2019 Pacifica has 43k miles on it and has been making the same noise and occasional jolting for the last 10k miles or so. I do find a lot of comfort knowing I'm not the only one because the problem is so difficult to explain. It's becoming increasing annoying and I'm about to sell the van because of it. I have avoided going to the dealer because I always get the "cannot replicate" and ends up being a waste of time. However, I'm going to take it in now so it's at least documented and Chrysler has to be aware of this problem by now.
 

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Best way to hear noise:
· Find a smooth level, or slightly downward sloping road

· Travel about 30 mph

· Lift foot off gas

Very gently step on gas



Noise is a clicking or stutter, almost like a ratchet…seems to occur when driveline spools-up from coasting.

Wondering if anyone else has experienced this?
This is an issue for me, I bought my 2017 used and just noticed this issue. Dealership said they couldn't replicate and told me i had a bad bearing. There could be a bearing issue but that is absolutely not what I'm experiencing here. Is there any fix? Has anyone gotten a new transmission out of this issue or other new part needed?
 

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From what I understand about the 9 speed gear box which Chrysler uses is that two of those ten gears use a “dog clutch” which feels different than the other gears because of the rough and rigid way it latches on. I can’t remember which gears they were but I recall something like 4th-5th and 7th-8th gears. I believe that maybe what some of you are experiencing since you guys mention specific speed and circumstances. Not saying that it should make you feel any better, but is there any transmission mechanic or one with some of that expertise in this forum?

I have edited for correctness.
 
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Car Motor vehicle Automotive lighting Hood Automotive tire


Here’s Alex talking about this transmission, even though he’s using a Honda Pilot as reference, it’s the same transmission in Pacifica as well.

 
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