7g transmission in w221
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Joined: Mar 2006
Posts: 117
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From: NSW, Australia
McLaren 570S, G12 BMW 750Li, GLE63s AMG Coupe
7g transmission in w221
Hi there,
Just wondering if anyone of you who have driven/own the new s550/s500 have noticed that when changing gears from reverse to drive or neutral to drive that there is a slight jerk? Is this normal or part of the transmission "thunk" that was reported elsewhere? However the shifts whilst driving are seamless! Any ideas guys? Thanks.
Just wondering if anyone of you who have driven/own the new s550/s500 have noticed that when changing gears from reverse to drive or neutral to drive that there is a slight jerk? Is this normal or part of the transmission "thunk" that was reported elsewhere? However the shifts whilst driving are seamless! Any ideas guys? Thanks.
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Joined: Feb 2006
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From: Washington, DC
98 Ford Explorer Limited, 2007 S550 LE
Originally Posted by dr.skp.ortho
Hi there,
Just wondering if anyone of you who have driven/own the new s550/s500 have noticed that when changing gears from reverse to drive or neutral to drive that there is a slight jerk? Is this normal or part of the transmission "thunk" that was reported elsewhere? However the shifts whilst driving are seamless! Any ideas guys? Thanks.
Just wondering if anyone of you who have driven/own the new s550/s500 have noticed that when changing gears from reverse to drive or neutral to drive that there is a slight jerk? Is this normal or part of the transmission "thunk" that was reported elsewhere? However the shifts whilst driving are seamless! Any ideas guys? Thanks.
Out Of Control!!
Joined: Jul 2003
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From: North Scottsdale, AZ
'71 Pinto
Originally Posted by akburton
I detect a little kick sometimes. I'm just assuming the transmission is still learing my driving pattern.
Most common complaint on the newer transmissions (i.e.: E & CLS) is that, when cold, 1-2 shifts rough (noticeable whereas all other shifts are not). I’m told there will be a software update to solve this soon. How soon? That’s up to the EDAC depending on how many complaints they receive.
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
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From: North Scottsdale, AZ
'71 Pinto
Originally Posted by RJC
Why would MB release the 221 with this issue not resolved during 2007 production?
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From: 2000 ft over the FL coast in a B-17
Various
Originally Posted by konigstiger
Get as much coin in the door upfront and worry about problems later? Possible vendor/supplier issue therefore exhausted what was on hand for the earliest builds? Isn’t this the norm for most manufacturers?
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Joined: Sep 2004
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Originally Posted by Kar don
i havent heard of any 7g downshift thunks issues for the 221 S
Dealer did a few things on my car, and it got better, but still does it.
Car still only has about 1700miles so I am waiting to see if it goes away once damn tranny learns my driving pattern.
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Joined: Mar 2006
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From: Los Angeles, CA
2000 ML320
I think most of you are misreading the first post (maybe)? This "thunk" doesnt happen while you're on the road. It's right after when you change from P -> D or D -> R, etc. Yes, I notice it as well. It's a big jerk when you change the gears while you're parked uphill/downhill. The first few times freaked me out a little bit, but I got used to it by now. I don't know if that happens to everyone as well.
edit: I read ur message dr.skp.ortho, and I do notice it on flat grounds as well. But it's not as big as when you're up/downhill
edit: I read ur message dr.skp.ortho, and I do notice it on flat grounds as well. But it's not as big as when you're up/downhill
Last edited by iLoveMyMB; Apr 14, 2006 at 01:47 AM.
Thread Starter
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Joined: Mar 2006
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From: NSW, Australia
McLaren 570S, G12 BMW 750Li, GLE63s AMG Coupe
Thanks ilovemyMB
Yes its actually a thunk when changing from P to D or R to D etc, not when changing the forward driving gears. Thanks for the response!
Yes its actually a thunk when changing from P to D or R to D etc, not when changing the forward driving gears. Thanks for the response!
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Joined: Aug 2003
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From: Las Vegas, NV
2011 E350 Cabriolet..White and Almond Mocha
Transmission
I have not had any events with my S550 transmission. I had a major thunk on my S430 and had to have the valve control replaced and readapted. But the 550 is smooth as can be...even when I first start it and the engine is cold. I detect a slight hint (not a bump or thunk) sometimes that the gear has engaged when I shift into R or D but this to me is completely normal.
I will be alert for any odd noises but to this point (980 miles) it is perfect.
I will be alert for any odd noises but to this point (980 miles) it is perfect.
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Joined: May 2006
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From: NYC/FT Lauderdale
W220 M113K
Shifting
hi guys i have the same problem on my s430. i realized if you apply more pressure on the brake the thump with go away i think its just the tranny sliping it to gear. it worked for me
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The thunk you are referring to happens in almost all cars. Here is how to avoid it. Step 1: When placing the vehicle in park, place you right foot on the brake (should already be there) and apply the parking brake prior to removing your right foot from the brake. This puts the weight of the vehicle on the parking brake, NOT the transmission. Step 2: When you later take the car out of park, first shift the transmission to D or R and THEN disengage the parking brake. This might sound complicated but it is very easy to get used to and is something I have done since I was first learning to drive in my grandfather's W116. This will eliminate the thunk.
For the 221, the parking brake takes care of step 2 as it will automoatically disengage when you apply the throttle in either Drive or Reverse.
For the 221, the parking brake takes care of step 2 as it will automoatically disengage when you apply the throttle in either Drive or Reverse.
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From: Irvine, CA
07 M6, 05 Noble, 01 S4, Smart ForTwo
I wouldnt count on the rough shifting to go away. My 7G has been like that since Nov. 03. Doesnt matter how many complaints, they "cant duplicate" the problem. The 1-2 isnt so bad but 3-2, 2-1 when coming to a slow stop is pathetic.
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From: NYC/FT Lauderdale
W220 M113K
Originally Posted by silberrosa
The thunk you are referring to happens in almost all cars. Here is how to avoid it. Step 1: When placing the vehicle in park, place you right foot on the brake (should already be there) and apply the parking brake prior to removing your right foot from the brake. This puts the weight of the vehicle on the parking brake, NOT the transmission. Step 2: When you later take the car out of park, first shift the transmission to D or R and THEN disengage the parking brake. This might sound complicated but it is very easy to get used to and is something I have done since I was first learning to drive in my grandfather's W116. This will eliminate the thunk.
For the 221, the parking brake takes care of step 2 as it will automoatically disengage when you apply the throttle in either Drive or Reverse.
For the 221, the parking brake takes care of step 2 as it will automoatically disengage when you apply the throttle in either Drive or Reverse.
it works for me thought there was something wrong also
Last edited by 02S430; May 3, 2006 at 08:32 PM.
