downshift shudder/rumble/stumble
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downshift shudder/rumble/stumble
should be enough '16s on the road by now so i am resurrecting my old question. i would like to know: if more people are feeling this; am i overly sensitive; or is something actually off.
gle 350-4m. on the automatic downshifts, i feel a "double" shudder/rumble/stumble (forgive the descriptor). it is most prominent on the 4/3 downshift, but i am now detecting in all downshifts to a lesser extent. if you drive a standard, i can say the feeling is akin to when you re-engage the clutch on a downshift.
as i posted in my original follow-up, when i visited service, the tech rode with me and indicated that it was part of the operation and related to the clutches resetting. during that test drive, the response was very subtle. the vehicle was sitting and off for almost 1/2 hour while i waited, and i now can say that it is more prominent after driving for a while. so the tech didn't feel the full force.
i've continued searching around and have listened to the MB video on the 7g several times. they do include a reference to engine braking assist via the clutches.
it all does make sense, but i would still like to hear if others have noticed it. fyi, i'm a very light braker, so that may be why i really feel the 4/3 downshift. i tried some hard braking and it does kinda get lost in the sauce, so to speak. appreciate any info. ron
gle 350-4m. on the automatic downshifts, i feel a "double" shudder/rumble/stumble (forgive the descriptor). it is most prominent on the 4/3 downshift, but i am now detecting in all downshifts to a lesser extent. if you drive a standard, i can say the feeling is akin to when you re-engage the clutch on a downshift.
as i posted in my original follow-up, when i visited service, the tech rode with me and indicated that it was part of the operation and related to the clutches resetting. during that test drive, the response was very subtle. the vehicle was sitting and off for almost 1/2 hour while i waited, and i now can say that it is more prominent after driving for a while. so the tech didn't feel the full force.
i've continued searching around and have listened to the MB video on the 7g several times. they do include a reference to engine braking assist via the clutches.
it all does make sense, but i would still like to hear if others have noticed it. fyi, i'm a very light braker, so that may be why i really feel the 4/3 downshift. i tried some hard braking and it does kinda get lost in the sauce, so to speak. appreciate any info. ron
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Joined: Apr 2016
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2016 GLE
feel the same
I feel the same on my GLE 350 4M around the same gears as you mention. I also feel it during the upshift as well. Like you, I do brake lightly. I'm also not overly aggressive with acceleration. Very different feeling from my previous 2013 ML.
I may bring into the dealer soon and have them ride with me.
I'm also interested in other's experiences.
I may bring into the dealer soon and have them ride with me.
I'm also interested in other's experiences.
Thread Starter
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ha! not possible. way too many years and miles to change now. 
not really worried as i have never had a problem with mb or my dealer not owning a problem, even past warranty.
the explanation makes sense, but just like to hear others noticing it. thx, ron
not really worried as i have never had a problem with mb or my dealer not owning a problem, even past warranty.
the explanation makes sense, but just like to hear others noticing it. thx, ron
Super Member
Joined: Jan 2003
Posts: 600
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From: San Francisco, CA
16 GLE400, 16 eGolf, 15 M3, 13 328i, 06 S430, 98 E320
Here's the reason ride you are feeling the roughness in shifting. Let's hope they will address this TSB:
http://www.autoserviceprofessional.c...enews-20160518
http://www.autoserviceprofessional.c...enews-20160518
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Thread Starter
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truck went in for service (ref my WTF thread). foreman drove the car again at length and said the trans is working as expected. he said several customers are commenting that they don't particularly like the downshifts. ron
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2008 CL63 AMG
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yes and no. i had it in a few times last fall because of a noted "bang" coming up the steering column. it was a definitive re-engagement of something in the driveline that caused the feeling. discussed it frequently with service (they indicated possible "breaking in") and I noted that such "looseness" at around 35K sounds ridiculous to me. had it in in December because it was getting too much for me. they had it for about a week. whatever they did, the "bang" was lessened and the 4/3 and 3/2 downshift rumble (previously described as the clutches) was virtually non-existent in normal speed reductions. (if you stood on the brake for a fast stop you can still feel the clutches slowing the truck).
that said, the downshifts are still smooth, but the "bang" reappeared in January. significantly notable in stop and go traffic as you give a little gas. i'm going back in shortly when the normal service comes up. i didn't get a chance to speak with the tech as to exactly what was done, but we'll deal with it shortly.
ron
that said, the downshifts are still smooth, but the "bang" reappeared in January. significantly notable in stop and go traffic as you give a little gas. i'm going back in shortly when the normal service comes up. i didn't get a chance to speak with the tech as to exactly what was done, but we'll deal with it shortly.
ron
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2008 CL63 AMG
Thanks, when you say rumble, is this a noise only or a sensation felt through the car? Mine on very light throttle, going up hill, when the car naturally wants to change down a gear i get no noise but a monetary rock back and forth sensation, most probably the clutches releasing and re engaging and that with the delayed response from requested torque these cars seem to suffer with..
Thanks
Thanks
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the rumble was/is a sensation (which is basically centered and felt under the truck) and most probably the clutches as the tech had explained. if you drive a manual, i would liken it to releasing the clutch faster, rather than lightly riding the pressure point on a downshift.
the "bang" is also a sensation up the steering column. it does feel like some kinda of re-engagement. imagine a driveshaft taking half a rotation before the differential engages. not that that is what it is, just an example. the truck's a 4matic so it could be from anywhere. i saw in the manual a "glide mode" that disengages the whole trans from the engine. guys here said not on my model, but that also would appear to feel like the bang if the re-engagement isn't synced correctly. we'll see in a bit. ron
the "bang" is also a sensation up the steering column. it does feel like some kinda of re-engagement. imagine a driveshaft taking half a rotation before the differential engages. not that that is what it is, just an example. the truck's a 4matic so it could be from anywhere. i saw in the manual a "glide mode" that disengages the whole trans from the engine. guys here said not on my model, but that also would appear to feel like the bang if the re-engagement isn't synced correctly. we'll see in a bit. ron
