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2010 2011 BMW 5 Series Forum F10 Random Thoughts on the 5 and 7 |
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06-04-2011, 10:55 AM | #23 |
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I had an F10 528i loaner last October for about 10 days. Seemed to me that when I stepped down, I could almost hear the tranmission say, "What? Oh? Me? Oh, okay," then downshift a bunch of gears and take off. When it finally picked a gear, the acceleration was surprisingly good. (My most recent four BMWs have been 282 HP or better, so I was expecting the Five with a naturally-aspirated 3-liter motor to be a slug. It wasn't.)
I also recently drove an F1 750Li. I found the tip-in to be very aggressive. I had a hard time driving it smoothly. Full disclosure: In over 30 years of car ownership, I've never had a car with fewer than three pedals, so I'm clearly not an expert on the subtleties of driving and living with an automatic transmission. I didn't even like the paddle shifters on the three ///M cars I drove at the One Day M School in Spartanburg.
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Previously... Threes: '08 E90 M3, '07 E92 335i, Fives: '11 F10 550i, '02 E39 M5, '00 E39 540i/6, '97 E39 528i, '92 E34 525i Others: VW, MBz, Peugeot, Toyota, Olds |
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06-04-2011, 05:25 PM | #24 | |
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For example, if previous drivers had driven the 528i slowly, with light throttle, this would encourage early upshifts that maximize fuel economy -- the car 'learns' this behaviour and assumes that is what the driver prefers. The 750Li might have hung around with a different crowd (heavy throttle), 'learning' this more aggressive driving behaviour. That is a possible explanation for the difference in behaviour you observed. I believe the 'adaptation' of the ZF transmission is linked with engine management and throttle mapping, although I don't pretend to know the details. Here is how the online BMW Technology Guide describes the software: Quote: Adaptive Transmission Management (ATM). Whether driving in city traffic or coming out of a curve at speed: Adaptive Transmission Management (ATM) recognises your individual driving style and automatically selects the right gear at the right moment, eliminating unnecessary shifts. ATM integrates data input from the accelerator pedal and the engine management system. By analysing the timing and manner that the driver applies the accelerator, ATM autonomously learns the driver's style - noting, for example, whether engine braking is often used, or if a gear is downshifted to accelerate out of curves. This pattern is continuously monitored, so that ATM always adapts to the style of the current driver. |
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06-04-2011, 06:31 PM | #25 |
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Agreed. However, once driver slams down the pedal past the kickdown there can only be one program for the tranny to select: go baby, go!
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06-05-2011, 03:19 PM | #26 | |
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I was thinking same way as you but in 7series you dont feel you are part of car as in 5... I only wish I can order door handles from 7 to 5 series Make 5 series loaded and you will be happy with it.... |
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06-05-2011, 05:23 PM | #27 | |||
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While I did think the 528/8AT combo was great because it kept the engine in the sweet spot, I was still worried that it would be overly shifty during normal driving, especially up and down highway grades. It didn't seem right at all in the 535 though. With all that torque available below 2000rpm, why did it constantly want to shift to lower gears whenever you touched the gas? Just pick a gear and run with it... Liked the 335/6AT much better. Touch the gas from lower speeds and it would pull nicely in the gear it was already in without downshifting. It just went. A little more and a nice solid feeling kickdown and corresponding increase in acceleration. I dunno. The 6AT just felt "right" to me, whereas the 8AT didn't.
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06-07-2011, 03:04 AM | #28 | |
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06-07-2011, 04:45 AM | #29 |
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Frankly, it is under consideration for me. It will just be heck negotiating for it. Supposedly production for us won't be until March. Worst of all, via a thread I started yesterday, I'm sure it will have this crappy electronic/inaccurate/intermittent dipstick... That just won't work for a head case like me. It may very well wreck me owning a BMW...
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06-07-2011, 07:27 AM | #30 | |
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My issue is the opposite, upshifts earlier than I would like. |
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06-07-2011, 07:29 AM | #31 |
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Leave it in sport
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BMW if you are reading, I need a job, Please. |
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