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Thread: 2018 CX 5 Low Speed Transmission Hesitation/ Jerk / Lurch

  1. #181
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    Figured I’d follow up since my appointment, which was a total waste of time.

    The customer report was:”strange behavior when shifting from first to second when cold”

    That in and of itself annoys me because I specifically said there is a shift flair. Something someone in the automotive service business should know is a term.

    The techs notes where that he couldn’t replicate the issue and that “skyactiv engines idle high for a few minutes when cold”

    When I asked what engine idle speed has to do with the transmission shifting, the response was that there is no issue.

    I then asked if the fluid level was checked like I had requested. “Oh yeah, it was and it’s fine.”

    I Just checked the plastic panels that would need to have been removed, no finger prints or markings at all.

    What a joke.

  2. #182
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    Quote Originally Posted by 2001birdowner View Post
    Figured I’d follow up since my appointment, which was a total waste of time.

    The customer report was:”strange behavior when shifting from first to second when cold”

    That in and of itself annoys me because I specifically said there is a shift flair. Something someone in the automotive service business should know is a term.

    The techs notes where that he couldn’t replicate the issue and that “skyactiv engines idle high for a few minutes when cold”

    When I asked what engine idle speed has to do with the transmission shifting, the response was that there is no issue.

    I then asked if the fluid level was checked like I had requested. “Oh yeah, it was and it’s fine.”

    I Just checked the plastic panels that would need to have been removed, no finger prints or markings at all.

    What a joke.
    Wow, what a joke of a dealership. Maybe ask to do a tech ride along.

    I will bring up the shift flair the next time I am at the dealership. I tried using Mazda radar cruise control in heavy traffic and noticed that the lurching or clunks are still happening.

  3. #183
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    Quote Originally Posted by Googleplex View Post
    Oh ok. That does happen in traffic - seems like it's hesitant to shift when I get to around 18 mph and then it shifts down and the car starts engine braking. I have had it where the car does start "wobbling" or oscillating a little bit in these conditions.

    When I had the rental 2018 CX-5, I would manually shift into manual mode and hold the car in 2nd in stop and go traffic.

    My driving habits in stop and go traffic are to use the brakes as least as possible and to maintain movement. The MRCC is a bit agressive in stop and go conditions.
    THAT is a perfect description of what happens to mine! wobbling and oscillating.

    So, are we lead to believe that this is NORMAL behaviour for this car?

  4. #184
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    Quote Originally Posted by mac.mc78 View Post
    THAT is a perfect description of what happens to mine! wobbling and oscillating.

    So, are we lead to believe that this is NORMAL behaviour for this car?
    I hope not. It is getting pretty annoying.

    Here's a diagnostic table:
    Mazda Transmission GW6A-EL and GW6AX-EL Quick Diagnosis Chart.PNG

    I think there's two issues being discussed in this thread:
    1. Engine Flare/Slip or Shift Shock when upshifting or downshifting and when the accelerator pedal is depressed --- marked up with red
    2. "Judder/Shift Shock" when the torque converter clutch (TCC) is operated --- highlighted in yellow



    Can we add a poll to this thread or start a Google doc form to gauge what the issues are?
    Model, Year, Transmission, and issue according to the quick diagnosis char

  5. #185
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    Quote Originally Posted by Googleplex View Post

    Can we add a poll to this thread or start a Google doc form to gauge what the issues are?
    Model, Year, Transmission, and issue according to the quick diagnosis char
    You might want to include something about the fluid level. "Is it full [either from factory or topped off] and do the symptoms persist?"

  6. #186
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    Quote Originally Posted by Googleplex View Post
    Here's a diagnostic table:
    Mazda Transmission GW6A-EL and GW6AX-EL Quick Diagnosis Chart.PNG

    I think there's two issues being discussed in this thread:
    1. Engine Flare/Slip or Shift Shock when upshifting or downshifting and when the accelerator pedal is depressed --- marked up with red
    2. "Judder/Shift Shock" when the torque converter clutch (TCC) is operated --- highlighted in yellow
    Where did that chart come from? If nothing else, perhaps it will help some of us describe the issues we experience with words the dealer should understand. In the past I have always felt that many things were lost in translation between the service advisor and the technician.

  7. #187
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    Quote Originally Posted by Avoidin Deer View Post
    You might want to include something about the fluid level. "Is it full [either from factory or topped off] and do the symptoms persist?"
    I know this is going to come off as a big ass whine from me, but I'm totally new to this vehicle, and I can't find any reliable documents that show me HOW to bloody-well check the transmission oil.

    I know its tucked somewhere under the air filter housing, but I just wish I had some documents to follow.

    I don't want to mess anything up, and my dealer has been extremely unhelpful "It's not supposed to be checked, there's no dipstick" and then when I tell them I have a forum-full of people who claim that it can be checked, he stares at me like I have 2 heads. LOL

    I guess I'll try to find some documentation on the engine compartment somewhere and Ill muck around it this weekend.

  8. #188
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    I've experienced this on my '17. Based on years of experience driving a manual I would say this is due to the tq converter being locked as it feels like being in 1st at parking lot speed but not letting out the clutch at all. My bet is it's somewhat normal and just Mazda's expanded use of the lockup isn't perfect. It does let their auto feel more DSG like which I think is good while being smooth most of the time. FWIW my GTI with a DSG is usually smoother in this scenario as I believe it slips the clutch a bit. The main place where I think the Skyactiv AT is most consistently smoother is probably the lower gear downshifts when coming to a stop.

  9. #189
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    Quote Originally Posted by mac.mc78 View Post
    I know this is going to come off as a big ass whine from me, but I'm totally new to this vehicle, and I can't find any reliable documents that show me HOW to bloody-well check the transmission oil.

    I know its tucked somewhere under the air filter housing, but I just wish I had some documents to follow.

    I don't want to mess anything up, and my dealer has been extremely unhelpful "It's not supposed to be checked, there's no dipstick" and then when I tell them I have a forum-full of people who claim that it can be checked, he stares at me like I have 2 heads. LOL

    I guess I'll try to find some documentation on the engine compartment somewhere and Ill muck around it this weekend.
    The process for the 1st gen has been documented somewhere here. You could probably use that as a reference so that you aren't going in blind.

  10. #190
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    Quote Originally Posted by sm1ke View Post
    The process for the 1st gen has been documented somewhere here. You could probably use that as a reference so that you aren't going in blind.
    Thanks I'll try to dig it up.

    Much appreciated!

  11. #191
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    Arrow 2018 CX 5 Low Speed Transmission Hesitation/ Jerk / Lurch

    Quote Originally Posted by mac.mc78 View Post
    I know this is going to come off as a big ass whine from me, but I'm totally new to this vehicle, and I can't find any reliable documents that show me HOW to bloody-well check the transmission oil.

    I know its tucked somewhere under the air filter housing, but I just wish I had some documents to follow.

    I don't want to mess anything up, and my dealer has been extremely unhelpful "It's not supposed to be checked, there's no dipstick" and then when I tell them I have a forum-full of people who claim that it can be checked, he stares at me like I have 2 heads. LOL

    I guess I'll try to find some documentation on the engine compartment somewhere and Ill muck around it this weekend.
    Here you go (from 2018 Mazda Factory Service Manual):

    Transmission fluid change without filter replacement

    Some 2.5T owners said there’s some turbo plumbing / harness blocking the access of ATF dipstick.

  12. #192
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    Curious on the ATF levels. Has anyone had the jerking issue, checked the ATF level and it was low, then adding more fixed the problem?

  13. #193
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    Quote Originally Posted by yrwei52 View Post
    Here you go (from 2018 Mazda Factory Service Manual):

    Transmission fluid change without filter replacement

    Some 2.5T owners said there*s some turbo plumbing / harness blocking the access of ATF dipstick.
    THANK YOU!

    I will check - I have a 2.5T so we'll see this weekend. You rock!

  14. #194
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    There is a TSB that might apply to this:

    TSBID: 116041
    3019A - TRANSMISSION CONTROL MODULE SOFTWARE CONCERN
    Last Issued: 01/30/2019
    DESCRIPTION
    In affected vehicles equipped with automatic transmissions, electrical noise may be detected while driving in *D* range (including *Manual* mode). Due to inappropriate control logic of the software in the Transmission Control Module (TCM), this signal noise may cause the vehicle to unexpectedly downshift, causing an abrupt deceleration of the drive wheels. The sudden unexpected downshift while driving may negatively affect the stability of the vehicle, increasing the risk of losing vehicle control, potentially resulting in a crash. No crashes or injuries related to the subject condition have been reported to date. This recall is in Not Launched Status, however vehicles can be repaired. Please make sure if a vehicle arrives at your dealership that the repair is completed.

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