Clunk noise while shifting around 27-30mph - Honda Pilot - Honda Pilot Forums
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post #1 of 19 (permalink) Old 03-25-2017, 06:18 PM Thread Starter
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Clunk noise while shifting around 27-30mph

I'm afraid I may know the answer to the question but I'll ask it anyway. I seem to get a random clunk when shifting around 27-30mph. It almost sounds like a small backfire. It's usually accompanied by a hard shift, not neck breaking hard just noticeable. Doesn't seem to happen every time and is most noticeable under normal moderate acceleration. I've got a 2016 Touring with 3800 miles so obviously the 9 speed is the first suspect.

Any one got any thoughts?
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post #2 of 19 (permalink) Old 03-25-2017, 07:55 PM
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Not normal. But you already knew that. Could be trans software, but I doubt it. Suspect trans hardware, and that means trans swap. Good luck.
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post #3 of 19 (permalink) Old 03-25-2017, 07:58 PM Thread Starter
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Gonna schedule an appointment with my dealer this week. Not looking forward to this.
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post #4 of 19 (permalink) Old 03-25-2017, 10:13 PM
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They will likely tell you it is the dog clutch. They told us "it's normal". Ask them to look into that. We also had loose tie rods causing some incidental noise. Keep us posted.


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post #5 of 19 (permalink) Old 03-25-2017, 10:52 PM
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Dog clutch causes a pause/delay in some shifts; it should never make noise and it shouldn't cause a "clunk". Calling BS.
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post #6 of 19 (permalink) Old 03-26-2017, 09:43 AM
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Originally Posted by Wanderer View Post
Dog clutch causes a pause/delay in some shifts; it should never make noise and it shouldn't cause a "clunk". Calling BS.


That's what we keep telling corporate. Dealership is only doing what corporate says. Still fighting it.


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post #7 of 19 (permalink) Old 03-26-2017, 07:25 PM
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Do you have a transmission cooler installed?


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post #8 of 19 (permalink) Old 03-26-2017, 08:09 PM
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Had similar issue after installation of the ATF cooler. Dealer called the tech line, and concluded that it is fluid moving through the transmission, and that there was no issue with the vehicle. Dealer said that they tried to create a spacer to help dampen the noice.
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post #9 of 19 (permalink) Old 03-26-2017, 08:34 PM
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Originally Posted by Nick Sburne View Post
Had similar issue after installation of the ATF cooler. Dealer called the tech line, and concluded that it is fluid moving through the transmission, and that there was no issue with the vehicle. Dealer said that they tried to create a spacer to help dampen the noice.


We have the ATF cooler as well. Thanks


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post #10 of 19 (permalink) Old 03-26-2017, 08:35 PM
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Do you have a transmission cooler installed?


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Yes.


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post #11 of 19 (permalink) Old 03-26-2017, 09:15 PM
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There is a connection between increased noise/clunk shifting from 4-5 when the transmission cooler is installed. Honda Canada agreed with my dealer that they are connected.

Time will tell if the clunk means replacement... I've already had mine in twice for software updates, resets and diagnosis in less than a year of ownership.


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post #12 of 19 (permalink) Old 03-27-2017, 06:06 AM Thread Starter
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Yes. I've got the transmission cooler installed. I'm not sure what gears it's going between during that shift. Maybe I'll try manually shifting and see if it repeats.
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post #13 of 19 (permalink) Old 03-27-2017, 11:00 AM
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Yes. I've got the transmission cooler installed. I'm not sure what gears it's going between during that shift. Maybe I'll try manually shifting and see if it repeats.
Give it a try... I can repeat a clunk if I drop into 4th with the paddle shifters while in D mode and slowly either accelerate or stay constant. My experience is that high rpm, high throttle shifts may actually be smoother than a grandma driving type throttle. Where I would expect a silent shift is where I get clunks.

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post #14 of 19 (permalink) Old 03-27-2017, 11:19 AM Thread Starter
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I'll give it a shot today and see what happens.
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post #15 of 19 (permalink) Old 03-27-2017, 03:44 PM
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Sounds very similar to what we experienced with our 2016 EX-L Pilot. After 3 trips to the dealer, turns out the battery that was installed at the factory was in fact a bad one. It was leaking battery acid onto the Solenoid Switch and parts of the transmission causing the jerking/shifting problems. Hopefully this isn't what is happening to yours but something to ask them to check.
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