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Differential "bump" when taking foot off the gas

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Differential "bump" when taking foot off the gas

 
Old 08-16-2010, 12:35 PM
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2008 E350 4Matic
Differential "bump" when taking foot off the gas

2008 E350 4Matic, 5 speed transmission, S mode, 26K miles. Recently i've noticed that when accelerating (under 30 mph), and then removing my foot from the gas pedal, sometimes i feel sort of a "bump" from the rear, like a lose linkage or something like that... like there's some play in the drivetrain and the difference from applying an acceleration load to no acceleration load causes a very quick "bump".

I've not yet attempted to recreate the problem to better tighten the parameters around when it occurs, nor have I brought it in to be seen.

Anybody have the same issue?

Mike
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Old 08-19-2010, 09:59 AM
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2008 E350 4Matic
Okay, so I paid attention this time... it's an occassional hard downshift from 3 to 2 when taking my foot off the gas... going from moderate acceleration to foot off the gas... shouldnt' shift that hard in my opinion.

Anybody else have this occur?
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Old 08-19-2010, 11:02 AM
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2016 MB S550C4, 2016 BMW i8
I have the same issue with my E550. I thought it was only the 550s that had this problem. It has been discussed here before but I believe the complaints were all from E550 drivers.
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Old 09-08-2010, 11:25 PM
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2006 E55 AMG
I have a 2006 E55 and have the same exact problem but with gears 1 to 2 / 2 to 1. I've taken it to 5 different MB dealerships and they all claim nothing wrong with the transmission. I thought it may be because i reset my ECU and let all the gears shift at a high RPM (around 50 - 60). One dealer said it was because someone set the gear shifting too high so they reset the ECU again but i still have the same prob. Its like it either upshifts or downshifts really hard into 1st or second, sometimes hearing a light "bang". (I noticed this when at 20 - 30 rpm. This is my biggest concern as i feel like the trans is getting messed up. Please let me know if you can pinpoint a problem or solution.

Thanks.
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Old 09-29-2010, 03:09 PM
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BUMP!

I have exact question and experience.

E280 4matic 5 Speed 2007 here (not available in US). with just 36 kilo. (30 miles)

Often happens in sub 50 mphs right? also when you are in traffic jam. If fast accelerations, it often paused between shifts, that it doesn't know which gears to shift into.

Especially after some spirited driving that the transmission computer still in hyper mode.
Try a quick-stop at the stop-sign. 2nd into 1st gear is far more loud with this loud clanking noise. (also feels like rear ended by car behind like some folks here said)

I had driven many other MB 5 speeds... non behave like this, 96-97 V8s to AMG to Sprinter.
I hate to say the basic C240 5 speed auto is far more smooth and logic than this bigger 5 speed.

My previous W210 4Matic sometime jerks, but no clanking noise like now.

I know there is some bulletins for earlier E-W211, what about 06+ W211? It is very hard to reproduce these symptoms again. It just act up at random times.

Last edited by carl; 09-30-2010 at 11:40 AM.
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