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sloppy shifting when cold

 
Old 11-23-2013, 04:17 PM
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1999 MB C43 2004 E55 AMG, 2004 Suzuki GSXR, gl63
sloppy shifting when cold

Wanted to know if this is normal. I only bought the car about 2 months ago and it drives fine but sometimes it feels like it shifts really early and it almost throws the gear in. Once it warms up it generally gets a lot better. I bought the Eurocharged TCU tune but I'm not sure I want to install it just because I don't want any additional stress on the transmission. Any thoughts? Also wanted to mention that I did have the fluid changed at the time of purchase.
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Old 11-24-2013, 04:05 AM
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05 e55 amg
Car does the same thing when for the first 5 minutes of driving usually just first gear wondering the same thing as you also had my Trans fluid changed i dont think it's our tune
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Old 11-24-2013, 06:56 AM
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My car does the same thing. On a cold start, it short shifts into second (does the same in C mode). Transmission has been checked out fine by the dealer and independent mechanic and I've had the fluid and filter changed twice during ownership.

If I let the car idle for 5 minutes before I leave my garage, it greatly reduces it or it doesn't do it at all. Mine will only do it on the first shift of the drive, never after that.
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Old 11-24-2013, 07:45 AM
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08 E63 AMG P30
Mine has a similar issue. When cold either in reverse or D, car seems to hesitate. hard to explain it's just Jerky... E63...
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Old 11-24-2013, 11:57 AM
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It's normal. Since owning the car in '09, it often refuses to downshift to first gear when transmission is cold. If I force first gear by using manual mode or shifting down before the car rolls, it does the horsey hop/jerky/hesitating thing a few times before taking off unless I ease into acceleration.
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Old 11-24-2013, 12:47 PM
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1999 MB C43 2004 E55 AMG, 2004 Suzuki GSXR, gl63
Will im glad to hear its the norm. But im sure these beasts didnt run this sloppy out of the factory. If i bought it new id be dissapointed.
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Old 11-24-2013, 01:01 PM
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W211 E55 AMG
I was about to make this thread tonight too ha!

I also get if I'm at a standstill in d it seems to hesitate for the first few pull offs till warm... Was thinking maybe the cold weather makes the oil too thick?
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Old 11-24-2013, 01:56 PM
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05 e55 amg
Mine actually started to this after I changed the tranny fluid and filter weird but after warmed up its drives fine
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Old 11-24-2013, 06:39 PM
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Originally Posted by MaLicE View Post
I was about to make this thread tonight too ha!

I also get if I'm at a standstill in d it seems to hesitate for the first few pull offs till warm... Was thinking maybe the cold weather makes the oil too thick?
Exact same thing here, I'm thinking about taking it in to get looked at...
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Old 11-25-2013, 10:13 AM
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06 cls 55 amg
same here as well.
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Old 11-25-2013, 10:36 AM
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This is normal behavior. I pursued this issue extensively w/ my dealer, and their transmission master mech.

This issue is caused by not enough pressure in valve body in first start of the day. Function of valve body is to shift the gears - hence when there is not enough pressure to engage and un engage pistons - causes hard shift (hard jerks going from 1-2 and 2-1, If I remember it is K1 or K2 piston). MB usually update the transmission software - transmission pump comes on at full speed right after 15 sec when the car is started - help to get the enough pressure built up in the valve body and pump runs for 15 seconds. You will hear a slight pump noise if you have this "patch" installed. It helps a lot.

I live in DC and when it gets close to 32F - I had to warm up the car for 10 minutes or more for it to operate better - but with this new update, 2-3 minutes is enough to get the car going with out any really hard jerks.

This information is for 7 speed trany only.

Last edited by phalen302; 11-25-2013 at 10:45 AM.
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Old 11-25-2013, 10:41 AM
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2014 C63 AMG
Best thing to do is let the car idle for a minute or two before starting to drive in the cold months; not longer than that, though. Letting a car idle too long isn't good either, but a minute or two to get the fluids and motor flowing well is always a good idea.

Actually, this should be with any car.
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Old 11-25-2013, 01:41 PM
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Originally Posted by phalen302 View Post
This is normal behavior. I pursued this issue extensively w/ my dealer, and their transmission master mech.

This issue is caused by not enough pressure in valve body in first start of the day. Function of valve body is to shift the gears - hence when there is not enough pressure to engage and un engage pistons - causes hard shift (hard jerks going from 1-2 and 2-1, If I remember it is K1 or K2 piston). MB usually update the transmission software - transmission pump comes on at full speed right after 15 sec when the car is started - help to get the enough pressure built up in the valve body and pump runs for 15 seconds. You will hear a slight pump noise if you have this "patch" installed. It helps a lot.

I live in DC and when it gets close to 32F - I had to warm up the car for 10 minutes or more for it to operate better - but with this new update, 2-3 minutes is enough to get the car going with out any really hard jerks.

This information is for 7 speed trany only.
Good info. Thanks. It only happens on the first start of the day, always after sitting overnight. The first shift feels exactly like putting a manual car into second gear right off idle. After the first run through the gears it never happens again.

Glad to hear it seems like a "normal" issue.
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Old 11-26-2013, 10:19 AM
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Originally Posted by phalen302 View Post
This is normal behavior. I pursued this issue extensively w/ my dealer, and their transmission master mech.

This issue is caused by not enough pressure in valve body in first start of the day. Function of valve body is to shift the gears - hence when there is not enough pressure to engage and un engage pistons - causes hard shift (hard jerks going from 1-2 and 2-1, If I remember it is K1 or K2 piston). MB usually update the transmission software - transmission pump comes on at full speed right after 15 sec when the car is started - help to get the enough pressure built up in the valve body and pump runs for 15 seconds. You will hear a slight pump noise if you have this "patch" installed. It helps a lot.

I live in DC and when it gets close to 32F - I had to warm up the car for 10 minutes or more for it to operate better - but with this new update, 2-3 minutes is enough to get the car going with out any really hard jerks.

This information is for 7 speed trany only.
what dealer did you go to and how did you go about to get the tranny software updated?
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Old 11-26-2013, 11:09 AM
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Originally Posted by novae500 View Post
what dealer did you go to and how did you go about to get the tranny software updated?
Mercedes Benz of Chantilly - SA is Lisa Rozier. I complained that this issue is unacceptable. Their tech escalated the issue with MB and updated the software. Also would like to add that I have MB CPO vehicle.

Last edited by phalen302; 11-26-2013 at 12:48 PM.
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Old 11-26-2013, 10:44 PM
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Originally Posted by phalen302 View Post
This is normal behavior. I pursued this issue extensively w/ my dealer, and their transmission master mech. This issue is caused by not enough pressure in valve body in first start of the day. Function of valve body is to shift the gears - hence when there is not enough pressure to engage and un engage pistons - causes hard shift (hard jerks going from 1-2 and 2-1, If I remember it is K1 or K2 piston). MB usually update the transmission software - transmission pump comes on at full speed right after 15 sec when the car is started - help to get the enough pressure built up in the valve body and pump runs for 15 seconds. You will hear a slight pump noise if you have this "patch" installed. It helps a lot. I live in DC and when it gets close to 32F - I had to warm up the car for 10 minutes or more for it to operate better - but with this new update, 2-3 minutes is enough to get the car going with out any really hard jerks. This information is for 7 speed trany only.
I'm afraid you have no knowledge of what your talking about. The front pump is mechanically driven, software will not affect its pressure.

There is also many more variations in what can cause a harsh shift than it's operating pressure.
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Old 11-27-2013, 02:13 AM
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Mine does it to from 2nd-3rd.. shifts fine just rough.. but only during warm up. My M3 did the same bs.. assumed it was just part of warm up process. I just had my trans checked by dealer.. its in perfect working order. the longer i let it warm up the less noticeable it its.
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Old 11-27-2013, 09:46 AM
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Originally Posted by Shifter View Post
I'm afraid you have no knowledge of what your talking about. The front pump is mechanically driven, software will not affect its pressure.

There is also many more variations in what can cause a harsh shift than it's operating pressure.
Sir I am not sure if you are living under a rock or just don't know the topic - there are very large vendors out there who sell custom mappings which change the behaviors of the "Mechanical" items. If your statement was true - custom tuning business would not exist. Just an FYI to you - on MB, you can program a lot of things.

The information I posted above was given to me the MB mech at the MB dealership - not a self proclaimed MB experts.

In my mind the purpose of these forum/threads is build up a wealth of knowledge and not shoot from behind. The comment you posted has no value to this topic and please contribute vs. hate. Just 0.02 cents.
Attached Thumbnails sloppy shifting when cold-photo.jpg  

Last edited by phalen302; 11-27-2013 at 10:48 AM.
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Old 11-27-2013, 10:25 AM
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all they did was clear all adaptations and reset them.
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Old 11-27-2013, 12:37 PM
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Originally Posted by phalen302 View Post
Sir I am not sure if you are living under a rock or just don't know the topic - there are very large vendors out there who sell custom mappings which change the behaviors of the "Mechanical" items. If your statement was true - custom tuning business would not exist. Just an FYI to you - on MB, you can program a lot of things. The information I posted above was given to me the MB mech at the MB dealership - not a self proclaimed MB experts. In my mind the purpose of these forum/threads is build up a wealth of knowledge and not shoot from behind. The comment you posted has no value to this topic and please contribute vs. hate. Just 0.02 cents.
This isn't about a aftermarket tune right? I didn't refer anything about that and I am well aware of them. What you posted about software changing the pumps pressure is factually wrong. Again it is mechanically driven by the tq convertor software can't change that specifically.
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Old 11-27-2013, 12:39 PM
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Oh and not here "hating" just fixing incorrect info put out there.
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Old 11-27-2013, 02:31 PM
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Originally Posted by Shifter View Post
Oh and not here "hating" just fixing incorrect info put out there.
Be careful, man. He might mistake your E55 for a E320

phalen - good job wasting your time at the dealer while they cleared adaptations You need a vacation from the forum, good thing it's Thanksgiving week
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Old 11-27-2013, 03:38 PM
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Cars do different things when cold, first just be happy they start, allow the car to come up to operating temp, not just the coolant but all fluids. Then if you still have an issue well then maybe there is actually a problem but to expect a car to operate perfectly in cold weather just after a cold start then you are in dream land. IMO
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Old 11-02-2014, 04:49 PM
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1999 MB C43 2004 E55 AMG, 2004 Suzuki GSXR, gl63
Gonna have my car checked out at a tranny shop, cold weather is coming around the corner, and this ****ty behaviour is returning. Makes my car feel like a GEO when its cold. Anybody solve this yet?
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Old 11-03-2014, 08:17 AM
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I have been an automatic transmission builder for 27years and under no circumstances is it possible for a mechanically driven pump that is attached to a torque converter spin faster than the engine speed when needed. What is possible is the tcu will allow more fluid pressure to be achieved when needed.the pressure control solenoids act as a dam if you will and regulate fluid pressure or flow. I have built many of these and I know this as fact.
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