10-03-2013, 12:01 AM | #23 | ||
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Garage List 2018 BMW 340i M Sport [9.38]
2020 BMW M340i xDrive [10.00] 2018 BMW 340i M Sport [8.00] 2006 BMW 330i Sport [4.50] 2004 BMW 330i ZHP [7.25] 2000 BMW 328i [6.00] |
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It is normal behavior and occurs in all automatic transmission BMWs across the line. |
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10-03-2013, 12:42 AM | #24 |
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That's a feature. There's nothing more annoying than ATs that insist on being in the tallest gear at all times, so when you need to get on the throttle you either have 0 acceleration, or the transmission needs to bang down a gear or three. It's so much nicer to control the car with a single pedal than to have to ride the brake all the time.
This is the reason I prefer driving a stick in traffic to most automatics, you can just control the speed with the throttle. |
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10-03-2013, 06:04 PM | #26 |
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As a data point, I have driven a number of F30s. In my experience, the 328 xDrive exhibits the most jerky downshifting behavior, followed by the RWD 328.
This is not an anti-328 not anti xDrive observation. I suspect the engine type and driveline variant affects the degree to which this occurs. This is not a "performance car" issue. Most sports/performance cars with ATs do not exhibit this behavior. |
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07-19-2020, 01:48 PM | #27 |
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2015 320i all of a sudden slows down automatically at high speeds
I was on interstate today driving about 80mph and all of a sudden the car feels like its braking for a moment then goes back to normal, the rpms falls a little bit but it drop my back about 5-10 mph then goes back to normal. I'm still on the gas pedal and no response at the time.. it feels like I'm braking but I'm not. it did this 5 times in a distances of 20 miles. please help. I have NO check engine lights or codes. bmw is stock. what can this be
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07-19-2020, 02:19 PM | #28 | |
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08-27-2020, 02:40 PM | #29 |
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I can totally relate, I was actually looking to post an identical message for my 2017 440 GC. I purchased it a month ago with 29k miles. It's a blast to drive except in traffic under 20mph. I previously had a Mercedes c300, and you didn't feel a thing regardless of how little input you gave the throttle. I would say the BMW is too torquey at very low speeds, especially in stop and go traffic.
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08-27-2020, 04:22 PM | #30 | |
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How can I tell if my car has this feature? And how do I activate it? |
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08-27-2020, 08:46 PM | #31 |
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This is something I asked here a year ago when I first got our bmw, that it had negligible engine braking, it's down to the transmission and smoothness. I run my car hard practically every trip, and aside from a weird clunk when first moving in reverse, this has got to be one of the smoothest transmissions ever.
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08-27-2020, 10:20 PM | #33 |
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I know I am out of place here, but you all should try to drive a 328d and see it's engine braking. You will probably find your 328i to be a smooth car. I can drive 40 mph in traffic, coming to a traffic light, and the car will easily slow down to 10 mph without a push of a brake pedal. All engine braking. Sometimes I feel people behind me think my brake lights are broken since I don't have to use them unless I need to come to a complete stop after car downshift to the first. Closer to first gear, the more engine braking. Diesel TDI VW with a DSG transmission has the most engine braking. 328d diesel with ZF8HP has quite a bit, but less than DSG. Driving a gasser with a regular transmission - the car coasts as if it in in neutral. I agree, best way to experience smooth coasting is to use EcoPro or manually put car into Neutral when coasting down, then it is smooth as butter. When in gear and especially with diesel engine, prepare to have your neck jerk a little as the car downshifts and engine brakes. You get used to it, nothing new.
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08-27-2020, 11:37 PM | #34 | |
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08-28-2020, 02:25 PM | #35 | |
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Yes, valvetronic petrol and diesel engines do have a throttle body, but for other functions, (like DPF regeneration and shutdown in the diesel, idling and failsafe function in the petrol), not the old 'throttling' we were used to. Gearbox software is going to have more influence on forced down changes and increased rpm, which adds to the frictional load on the engine. We'd need a form of exhaust braking to get purposeful engine braking. |
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