C63 AMG (W204) 2008 - 2015

Rough downshifting?

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Old 11-05-2009, 01:06 AM
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'10 F150 FX4 SCrew. '14 S212S
Rough downshifting?

Anybody experience this?

When I downshift from 4th to 3rd, it engages in a very rough fashion. No other gears do this.

Any insights?
Old 11-05-2009, 01:16 AM
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Originally Posted by benyl
Anybody experience this?

When I downshift from 4th to 3rd, it engages in a very rough fashion. No other gears do this.

Any insights?
It's probably because you're traveling at fairly high speeds when you make that downshift. Try going down to 2nd at that same speed (if the car would allow it, that is), I'm sure it'll be even rougher.

On a related note, some people actually like it rough; just ask some of my ex-girlfriends.
Old 11-05-2009, 07:06 AM
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2014 Lotus Evora S
Originally Posted by benyl
Anybody experience this?

When I downshift from 4th to 3rd, it engages in a very rough fashion. No other gears do this.

Any insights?
Had the same issue even at relatively low speed from 4th to 3rd and from 3rd to 4th, there was something weird as if there was a dead zone followed by a push forward (hard to described actually).

I brought the car back to the dealership a couple of weeks after I got the car. They said that there was something odd with the TCU values showing up on the computer. They re-programmed it and it fixed the issue.
Old 11-05-2009, 10:23 AM
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'10 F150 FX4 SCrew. '14 S212S
Originally Posted by Mr. Happy
Had the same issue even at relatively low speed from 4th to 3rd and from 3rd to 4th, there was something weird as if there was a dead zone followed by a push forward (hard to described actually).

I brought the car back to the dealership a couple of weeks after I got the car. They said that there was something odd with the TCU values showing up on the computer. They re-programmed it and it fixed the issue.
Hmm. Sounds like what I have. I guess I will have them look at it when I get the rear diff fluid changed.

It happens at any speed. Especially noticeable when going slow whether I am on the gas or not.
Old 11-05-2009, 11:05 AM
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4th --> 3rd, 90% of the time is rough, regardless of rpm's. It's like the car forgets to rev match. The only time it's smooth is if it's at near idle speed.

4th --> 5th at low rpms, same thing. Doesn't matter if it's auto mode or manual mode, feels like a power shift.
Old 11-05-2009, 11:47 AM
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2012 E350 4matic
no issues with my mid 08 build date 09 model. but i will keep watch.
Old 11-05-2009, 06:37 PM
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2014 Lotus Evora S
Originally Posted by rage2
4th --> 3rd, 90% of the time is rough, regardless of rpm's. It's like the car forgets to rev match. The only time it's smooth is if it's at near idle speed.

4th --> 5th at low rpms, same thing. Doesn't matter if it's auto mode or manual mode, feels like a power shift.
Actually it was the shift from 4th to 3rd and from 4th to 5th that was weird on my car when I got it. A visit to your dealership did solve it.

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