Downshift from 4th to 3rd?
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Junior Member
Joined: Jan 2010
Posts: 16
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C63 AMG
Downshift from 4th to 3rd?
I've had my used 2018 (pre-facelift) non S estate for a couple of months now and have noticed that on occasions, when in sport+ in manual mode, changing down from 4th to 3rd gives a bit of thud and doesn't seem to rev match properly.
It doesn't happen that often but enough to make me notice it.
Is this normal or worth getting looked at as its under 'Used MB warranty' still.
It doesn't happen that often but enough to make me notice it.
Is this normal or worth getting looked at as its under 'Used MB warranty' still.
Super Member
Joined: Jan 2020
Posts: 546
Likes: 228
From: Sydney
C63 S Coupe
I've had my used 2018 (pre-facelift) non S estate for a couple of months now and have noticed that on occasions, when in sport+ in manual mode, changing down from 4th to 3rd gives a bit of thud and doesn't seem to rev match properly.
It doesn't happen that often but enough to make me notice it.
Is this normal or worth getting looked at as its under 'Used MB warranty' still.
It doesn't happen that often but enough to make me notice it.
Is this normal or worth getting looked at as its under 'Used MB warranty' still.
Last edited by George_1992; Oct 30, 2021 at 10:31 AM.
Out Of Control!!
Joined: Sep 2018
Posts: 14,694
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From: unbegrenzt
2017 GLE350 4MATIC
Agree with normal. The 7G is clunky shifting into and out of 4th gear, mostly downshifting. For example 5-->4 and 4-->3. It's likely related to clutch K3 which is overworked in the box design. K3 is engaged in all gears except 4th. Actuating K3 with negative (braking) torque seems to be the problematic condition. I chalk it up to another MBAG design error.
MBWorld Fanatic!
Joined: Sep 2016
Posts: 1,723
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From: Australia
⏱️ 700HP Facelift converted C63 S Coupe with Drexler 3.06 plated LSD
It happens here and there in Sport Plus or Race mode using full Automatic mode too but in full Manual mode it always happens from 4th to 3rd.
Agree with normal. The 7G is clunky shifting into and out of 4th gear, mostly downshifting. For example 5-->4 and 4-->3. It's likely related to clutch K3 which is overworked in the box design. K3 is engaged in all gears except 4th. Actuating K3 with negative (braking) torque seems to be the problematic condition. I chalk it up to another MBAG design error.
Member
Joined: Jun 2017
Posts: 117
Likes: 25
2017 C63S AMG
With your mileage, it’s about time to do a trans flush and have the transmission relearned at your dealership. I recently did this service (purchased trans flush kit from FCP Euro and dealer did service)/trans relearn and the car drives like new.
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