The "hold down accelerator for 25s" trick for smoother shift
01-19-2009, 02:59 PM
#211
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Originally Posted by Burj530' post='675368' date='Sep 22 2008, 12:51 PM
I had the same problem. It happened at around 80~90 km/h in steptronic mode. Get the software updated and the problem is fixed.
am'i supposed to try the 25s' tranny reset? or what software upgrade are you referring to? i just don't want to make things worse.
when making the reset do i start the car after 25-30s' or do i turn off the electronics and then start it?
03-10-2009, 08:23 PM
#213
Originally Posted by will2k' post='770659' date='Jan 18 2009, 05:24 AM
Holy smokes, how do you get banned 7 times!! LOL.... there should be a 3 strikes rule! if you cant get it right your third time.... thats it! banned for life
05-11-2009, 01:26 AM
#215
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My Ride: 525d auto(2004)-SILVER GREY
Options: Beige/cream leather, maple wood,Bi-xenons, PDC,heated seats......
Originally Posted by bmw809' post='813262' date='Mar 10 2009, 11:32 PM
Tried it.. havent seen any difference
But then again i only really tear it up on weekends, weekdays i just do the smooth sailing so lets see.
But then again i only really tear it up on weekends, weekdays i just do the smooth sailing so lets see.
The car changes up quicker and stays in 4/5 for longer, instead of staying in 3rd above 30mph unitl reaching 35.
I can see the mpg go above 30 at 30-40mph and even reach near 50 mpg(needle not readout). Before i was lucky if it ever went above 30 during 30mph. This means car changes up quicker which i want so i can save on fuel. Not much of I heavy footed driver although do put foot down whe i need to.
Will report on fuel economy as this has been diabolical for me 20-22mpg on 525d auto.
06-10-2009, 02:34 AM
#216
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I've just done this with my recently acquired 535d and it's made a very noticeable difference to the behaviour of the gearbox. Beforehand, the gearbox kept shifting down and spinning up the torque converter every time I accelerated. Now it holds a higher gear for longer and even shifts up to ride the wave of mid-range torque from the engine. It just feels so much correct than it did.
I'd really like to understand what is happening here though, as I am very sceptical that holding the throttle down for 25s could in any way be linked to making the gearbox reset. I don't think that there is any kind of memory inside the gearbox either (there is no mention of it in ZF's literature) and the 'adaptive' nature of the gearbox is due to it having multiple maps that it can apply to driving style. I have a theory though...
AIUI the gearbox sees all manner of senders, such as throttle position, steering angle, speed, gearstick position etc, and decides which of its four maps to use and in turn which gear to use from the map. Could it be that during normal day-to-day driving under part throttle that the gearbox gets used to seeing a restricted range of throttle travel and over time will then tend to apply a more aggresive gearshift pattern for smaller throttle inputs? I could understand if holding the throttle wide-open for 25s caused the gearbox to re-learn the true range of throttle movement from the throttle potentiometer, which in turn caused it to use a more appropriate gear...this certainly seems to have been borne out by my experience, but I could be jumping to conclusions!
Oh, and I didn't hear any noises from the gearbox either...but I wasn't expecting anything to physically move or 'reset' in there. I suggest that the resetting noises other people have heard are co-incidental, such as from the climate control.
I'd really like to understand what is happening here though, as I am very sceptical that holding the throttle down for 25s could in any way be linked to making the gearbox reset. I don't think that there is any kind of memory inside the gearbox either (there is no mention of it in ZF's literature) and the 'adaptive' nature of the gearbox is due to it having multiple maps that it can apply to driving style. I have a theory though...
AIUI the gearbox sees all manner of senders, such as throttle position, steering angle, speed, gearstick position etc, and decides which of its four maps to use and in turn which gear to use from the map. Could it be that during normal day-to-day driving under part throttle that the gearbox gets used to seeing a restricted range of throttle travel and over time will then tend to apply a more aggresive gearshift pattern for smaller throttle inputs? I could understand if holding the throttle wide-open for 25s caused the gearbox to re-learn the true range of throttle movement from the throttle potentiometer, which in turn caused it to use a more appropriate gear...this certainly seems to have been borne out by my experience, but I could be jumping to conclusions!
Oh, and I didn't hear any noises from the gearbox either...but I wasn't expecting anything to physically move or 'reset' in there. I suggest that the resetting noises other people have heard are co-incidental, such as from the climate control.
08-04-2009, 12:14 PM
#217
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Have the same problem with the car it kinda knocks into gear when changing up and down.
I tried this but see no difference.Its going into our local bmw specialist tomorrow so hopefully
he might be able to cure it as I dont even want to dive the car now its just no nice to drive
I tried this but see no difference.Its going into our local bmw specialist tomorrow so hopefully
he might be able to cure it as I dont even want to dive the car now its just no nice to drive
08-04-2009, 02:20 PM
#218
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ZOMG!
You guys have just got to try this out!
It really does save you fuel! I can feel it right away! Just like the sprint booster makes my car feel so much faster!
It REALLY works guys! I promise!
You guys have just got to try this out!
It really does save you fuel! I can feel it right away! Just like the sprint booster makes my car feel so much faster!
It REALLY works guys! I promise!
08-04-2009, 04:11 PM
#219
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My Ride: 535d M Sport - Visibilty, Media, Logic7, Heated Comfort Seats, too many other extras to list
Originally Posted by Kzang' post='965571' date='Aug 4 2009, 11:20 PM
08-04-2009, 11:19 PM
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Originally Posted by milesr3' post='906610' date='Jun 10 2009, 11:34 AM
I've just done this with my recently acquired 535d and it's made a very noticeable difference to the behaviour of the gearbox. Beforehand, the gearbox kept shifting down and spinning up the torque converter every time I accelerated. Now it holds a higher gear for longer and even shifts up to ride the wave of mid-range torque from the engine. It just feels so much correct than it did.
I'd really like to understand what is happening here though, as I am very sceptical that holding the throttle down for 25s could in any way be linked to making the gearbox reset. I don't think that there is any kind of memory inside the gearbox either (there is no mention of it in ZF's literature) and the 'adaptive' nature of the gearbox is due to it having multiple maps that it can apply to driving style. I have a theory though...
AIUI the gearbox sees all manner of senders, such as throttle position, steering angle, speed, gearstick position etc, and decides which of its four maps to use and in turn which gear to use from the map. Could it be that during normal day-to-day driving under part throttle that the gearbox gets used to seeing a restricted range of throttle travel and over time will then tend to apply a more aggresive gearshift pattern for smaller throttle inputs? I could understand if holding the throttle wide-open for 25s caused the gearbox to re-learn the true range of throttle movement from the throttle potentiometer, which in turn caused it to use a more appropriate gear...this certainly seems to have been borne out by my experience, but I could be jumping to conclusions!
Oh, and I didn't hear any noises from the gearbox either...but I wasn't expecting anything to physically move or 'reset' in there. I suggest that the resetting noises other people have heard are co-incidental, such as from the climate control.
I'd really like to understand what is happening here though, as I am very sceptical that holding the throttle down for 25s could in any way be linked to making the gearbox reset. I don't think that there is any kind of memory inside the gearbox either (there is no mention of it in ZF's literature) and the 'adaptive' nature of the gearbox is due to it having multiple maps that it can apply to driving style. I have a theory though...
AIUI the gearbox sees all manner of senders, such as throttle position, steering angle, speed, gearstick position etc, and decides which of its four maps to use and in turn which gear to use from the map. Could it be that during normal day-to-day driving under part throttle that the gearbox gets used to seeing a restricted range of throttle travel and over time will then tend to apply a more aggresive gearshift pattern for smaller throttle inputs? I could understand if holding the throttle wide-open for 25s caused the gearbox to re-learn the true range of throttle movement from the throttle potentiometer, which in turn caused it to use a more appropriate gear...this certainly seems to have been borne out by my experience, but I could be jumping to conclusions!
Oh, and I didn't hear any noises from the gearbox either...but I wasn't expecting anything to physically move or 'reset' in there. I suggest that the resetting noises other people have heard are co-incidental, such as from the climate control.
Theres supposed to be a 1000mile learning process but wonder if anyone has got to 1000 miles after reset and thought ' ahh all working fine now, no need to ever reset again ' somehow i doubt it.
Ive tried lots of different reset driving techniques but still require frequent resets.