Double Upshifting

Icy J · 11-30-2016, 07:15 AM

This is something that's been happening for a long time but never bothered me too much, but wondering why it happens. If I put the gearbox in full manual DS mode, and floor it from 1-2, and press the shift paddle myself, the car will shift twice instead of just once, and I end up in 3rd gear instead. It only happens when flooring it/shifting at higher rpms. Am I trying to shift at too high a RPM or something?

aozer · 12-01-2016, 05:18 PM

ive definitely never had that happen

Roman G · 12-02-2016, 11:54 AM

Same happens to me. Just a computer preventing you from messing up i guess. If tranny is in Sport mode and I manually upshift, it will do it twice....1st to 2nd done by the car and 2 to 3rd done by you as computer takes over and has priority over you.

Pedped88 · 12-02-2016, 01:14 PM

Can you clarify one thing for me please? So you push the shifter to the left, and that's makes it D/S. Do you then press the paddles to make it fully manual before you start to drive? Because from what I understand and experience on my car, if I don't touch the paddles while the car is in D/S, it will still shift by itself but at a higher rpm. Sometimes I leave the car in D/S and start driving. If I then try to upshift myself at a high rpm while the transmission is also going to shift, I get a double shift. As the poster above me said the computer takes priority. This is what I think you're experiencing. Try making the car fully manual before you start driving and see if it happens again.

Sorry if this post is not coherent. Running on 3 hours of sleep and no coffee

SteveInfante · 12-19-2016, 11:38 AM

Maybe the car is trying to keep the engine in the torque sweet spot.

cpxchewy · 12-19-2016, 04:01 PM

It happens to me too, but only during WOT after the acceleration click (not sure if that's the best phrase to describe it...). I always assumed that because the car has 8 gears the maximum power band is smaller per gear. Therefore the car automatically detects the most optimal gear for the power band and will shift so that the power delivery is consistently smooth.

11-30-2016, 07:15 AM	#1
Icy J im a car 734 Rep 1,117 Posts Drives: 220i M Sport \| 520i M Sport Join Date: Jul 2008 Location: Hong Kong iTrader: (0) Garage List 2014 BMW 220i [10.00]	Double Upshifting This is something that's been happening for a long time but never bothered me too much, but wondering why it happens. If I put the gearbox in full manual DS mode, and floor it from 1-2, and press the shift paddle myself, the car will shift twice instead of just once, and I end up in 3rd gear instead. It only happens when flooring it/shifting at higher rpms. Am I trying to shift at too high a RPM or something? __________________ '14 220i M Sport \| AW/CR \| PUR Wheels RS07 19" \| KW V1 \| MTC Design F2X Kit [CF] \| Stage 1 ECU Tune \| Eventuri CF Intake \| Manhart Race Exhaust/Resonator Delete \| ER HFC Downpipe \| F8X LCA + TS \| M Style Grilles \| Gloss Black Roof \| Custom Steering Wheel \| Autotecknic Competition Shift Paddles [YMB] Instagram: @icyj95 \| FB
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12-01-2016, 05:18 PM	#2
aozer Lieutenant 995 Rep 598 Posts Drives: M235i Join Date: Sep 2016 Location: Texas iTrader: (0)	ive definitely never had that happen
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12-02-2016, 11:54 AM	#3
Roman G Private First Class 98 Rep 168 Posts Drives: a few Join Date: Jul 2014 Location: world iTrader: (0)	Same happens to me. Just a computer preventing you from messing up i guess. If tranny is in Sport mode and I manually upshift, it will do it twice....1st to 2nd done by the car and 2 to 3rd done by you as computer takes over and has priority over you.
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12-02-2016, 01:14 PM	#4
Pedped88 Enlisted Member 21 Rep 42 Posts Drives: 2014 M5 CP Join Date: Nov 2016 Location: Chicago iTrader: (0)	Can you clarify one thing for me please? So you push the shifter to the left, and that's makes it D/S. Do you then press the paddles to make it fully manual before you start to drive? Because from what I understand and experience on my car, if I don't touch the paddles while the car is in D/S, it will still shift by itself but at a higher rpm. Sometimes I leave the car in D/S and start driving. If I then try to upshift myself at a high rpm while the transmission is also going to shift, I get a double shift. As the poster above me said the computer takes priority. This is what I think you're experiencing. Try making the car fully manual before you start driving and see if it happens again. Sorry if this post is not coherent. Running on 3 hours of sleep and no coffee
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12-19-2016, 11:38 AM	#5
SteveInfante NewFinishColumbia/detailer 604 Rep 2,096 Posts Drives: 2015 F31 xDrive Join Date: Sep 2010 Location: Columbia, SC iTrader: (0)	Maybe the car is trying to keep the engine in the torque sweet spot. __________________ 328 F31 xDrive/OSM/Venetian Luxury Line/Cold Weather/Premium/Driving Assist/Nav/Tech "Golden Goose" 78' Honda CB400A project http://www.instagram.com/steve_inf31
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12-19-2016, 04:01 PM	#6
cpxchewy Monkey 119 Rep 241 Posts Drives: 2020 M2C Join Date: Aug 2014 Location: California iTrader: (1)	It happens to me too, but only during WOT after the acceleration click (not sure if that's the best phrase to describe it...). I always assumed that because the car has 8 gears the maximum power band is smaller per gear. Therefore the car automatically detects the most optimal gear for the power band and will shift so that the power delivery is consistently smooth.
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