ZF9 low gear rough shift on 2017 MDX - Acura MDX Forum : Acura MDX SUV Forums
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post #1 of 46 (permalink) Old 01-08-2018 Thread Starter
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ZF9 low gear rough shift on 2017 MDX

There is a rough shift on my 2017 MDX, mostly 1-2 shift. For up shift 1-2 , it happens when I gently apply gas pedal from stop. But if I apply gas very slow or fast, the shift is OK. For down shift 2-1, it happens when I apply brake very slowly before full stop of the car.
I've put 12k miles, at first I think the shift was generally smooth. I know the transmission is learning to adapt to the driver. Is it learning bad?


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post #2 of 46 (permalink) Old 01-08-2018
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Garage
Have the dealer take a look.

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post #3 of 46 (permalink) Old 02-15-2018
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Originally Posted by xhbl View Post
There is a rough shift on my 2017 MDX, mostly 1-2 shift. For up shift 1-2 , it happens when I gently apply gas pedal from stop. But if I apply gas very slow or fast, the shift is OK. For down shift 2-1, it happens when I apply brake very slowly before full stop of the car.
I've put 12k miles, at first I think the shift was generally smooth. I know the transmission is learning to adapt to the driver. Is it learning bad?
Hey there I came across this forum while researching the problem I have with my car.

I just purchased a 2017 Acura MDX w/Tech and entertainment and it has a similar problem to what you are describing. I took it to the dealer and was told that it's fine and that it is normal. There was an error code P0701 found and the technician reset the code and stated it's fine. Technician stated that the car just needed to learn my driving habit and the problem would go away but he reset the driving logic which made no sense to me at all.

It was bothering me a lot so I test drove two different MDXs (2018 and 2017) and both did not have this rough shift into 2nd gear.

I'm getting very frustrated with this issue and am taking the car into the dealer again to try and have it fixed.

Did you have any luck in getting your vehicle fixed? If so what was the repair that was done?

Thanks
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post #4 of 46 (permalink) Old 02-15-2018
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More transmission issues; disappointing. That said, is this only when cold, or all the time? Mine exhibits the same but only for the first 5 or so miles of driving. After it warms, the rough shift improves to only noticeable. I was told it is the nature of the super-low launch gear by the dealer.
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post #5 of 46 (permalink) Old 02-15-2018
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Ask the dealership to update the software per TSB 17-034
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post #6 of 46 (permalink) Old 02-15-2018
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More transmission issues; disappointing. That said, is this only when cold, or all the time? Mine exhibits the same but only for the first 5 or so miles of driving. After it warms, the rough shift improves to only noticeable. I was told it is the nature of the super-low launch gear by the dealer.
Hey there. My problems persists whether the car is cold or warm. The jerking is more violent when the car is cold but it never goes away regardless of how long I drive the car.

I did test drove two other MDXs while they were not warmed up and noticed no jerking into second gear. My thought on the matter is if this behavior is normal, it should be present on all MDXs with the ZF9 transmission but so far I have only been able to observe it on mine of the 3 that I have drove.
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post #7 of 46 (permalink) Old 02-15-2018
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Ask the dealership to update the software per TSB 17-034
I asked the tech regarding any software updates and he stated that "Checked for all software update and all was ok".

I'll ask again for them to check the software update.

Also came across "transmission pressure switch replacement" as another possible remedy so maybe ask about this as well... overall love the car but this and other problems have detracted from joy of my Acura ownership
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post #8 of 46 (permalink) Old 02-16-2018 Thread Starter
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Originally Posted by hojo1978 View Post
Hey there I came across this forum while researching the problem I have with my car.

I just purchased a 2017 Acura MDX w/Tech and entertainment and it has a similar problem to what you are describing. I took it to the dealer and was told that it's fine and that it is normal. There was an error code P0701 found and the technician reset the code and stated it's fine. Technician stated that the car just needed to learn my driving habit and the problem would go away but he reset the driving logic which made no sense to me at all.

It was bothering me a lot so I test drove two different MDXs (2018 and 2017) and both did not have this rough shift into 2nd gear.

I'm getting very frustrated with this issue and am taking the car into the dealer again to try and have it fixed.

Did you have any luck in getting your vehicle fixed? If so what was the repair that was done?

Thanks
Dealer always says it is normal. Mine has the 1-2 shift jerk regardless of whether cold or warm. The jerk is unnoticeable only when I do a very slow or very fast acceleration.

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post #9 of 46 (permalink) Old 02-16-2018
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Dealer always says it is normal. Mine has the 1-2 shift jerk regardless of whether cold or warm. The jerk is unnoticeable only when I do a very slow or very fast acceleration.
I have the same thing and have been noticing it more and more now that its mentioned on these forums. I plan to ask the dealer to update the software if there is one available. If not then I will have to just learn to deal with it.

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post #10 of 46 (permalink) Old 02-16-2018 Thread Starter
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Originally Posted by jiggs1219 View Post
I have the same thing and have been noticing it more and more now that its mentioned on these forums. I plan to ask the dealer to update the software if there is one available. If not then I will have to just learn to deal with it.
I've been dealing with it all the time. Will ask the TSB when my next service is due. Also will wait and see your update.

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Originally Posted by GOSSIPSAIGON View Post
Ask the dealership to update the software per TSB 17-034
Does this apply even if the warning message isn't shown? How does this smooth out the transmission and does it differ from TSB 15-054? Thanks in advance.
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Just back from the dealer for the second time and this is what the tech wrote up:

Felt rough shifting in 2nd gear, perform DTC scan, P2638, U0101-00, U0401-68, able to reset all DTCS, techline advise to reset the check datalist in PGMFI and perform PCM/ECM reset. Perform idle relearn after. Shifting is better now.

Felt the exact same jerking into 2nd all the way back home.

I guess Acura doesn't bother fixing error codes. Why make repairs when you can just reset all the error codes... maybe other car manufacturers will follow suit...

So much for Acura reliability or quality.

Should have kept my 10 year old Lexus....
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After you bring it back enough times and have them reset whatever, seems you could pursue a lemon law case.
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Quote:
Originally Posted by hojo1978 View Post
Just back from the dealer for the second time and this is what the tech wrote up:

Felt rough shifting in 2nd gear, perform DTC scan, P2638, U0101-00, U0401-68, able to reset all DTCS, techline advise to reset the check datalist in PGMFI and perform PCM/ECM reset. Perform idle relearn after. Shifting is better now.

Felt the exact same jerking into 2nd all the way back home.

I guess Acura doesn't bother fixing error codes. Why make repairs when you can just reset all the error codes... maybe other car manufacturers will follow suit...

So much for Acura reliability or quality.

Should have kept my 10 year old Lexus....
I posted the same exact thing. Wonder whats triggering that code.

2017 base AWD
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After you bring it back enough times and have them reset whatever, seems you could pursue a lemon law case.
Unfortunately there's no lemon law in Canada. There's only a manufacturer voluntary arbitration process called CAMVAP.
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