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2019 MDX SH-AWD Aspec
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Discussion Starter · #1 · (Edited)
Recently I took my 2019 MDX SH-AWD Aspec lease into the dealership as I was feeling some jerking/lurching whenever it switched from the 4th to 5th gear intermittently when driving normally.

The technician was not able to replicate the issue but when he hooked up the SUV to the computer, he found TCU/ECU update available for it from Acura. Those updates were applied to my MDX and I can confirm that I have driven it more than 500 miles since then and I have not felt any more jerks. I think the transmissions shift points have also changed and it seems more responsive to downshift when you press the gas pedal.

I was thinking of getting rid of it after my lease because of how crappy I think this transmission is but this update has changed my mind. I might just keep it because everything else seems to be fine.

I guess all along the ZF engineers were right that this may have to do with calibration (ZF Offers Tips for 9 Speed Woes)

Not sure about the ECU but here is the link to the TSB for TCU update: https://static.nhtsa.gov/odi/tsbs/2020/MC-10179400-0001.pdf if it concerns anyone.
 

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2017 Acura MDX Tech FWD
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This was talked a lot on the forum. Gonna say like at least 110 posts? This is a TCU related and has improved many of our members' MDXs shifting behaviors (including mine).
 

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This was talked a lot on the forum. Gonna say like at least 110 posts? This is a TCU related and has improved many of our members' MDXs shifting behaviors (including mine).
For me the interesting point here is the fact that a 2019 started showing some shifting issues that were resolved by the same TSB. The 2019 had SW and actual HW changes to the 9 speed that made it much improved over the earlier model years. I know when I went from my '17 to my '19 that the change was very noticible, and so far (albeit only 9500 miles) it's been flawless shift-wise. But this post is good info to have, knowing the TSB is effective even for the updated '19 and '20 models.

andy
 

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The revised update has all MDX (ZF-9) model year included.... (maybe excluded some of later built 2020 models)

117833
 
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