Unexpected Upshifts

16thBMW · 08-12-2009, 06:15 PM

Has anyone else had this problem with their Z4 automatic w/ paddle shifters? My '06 3.0i, when I'm driving around in manual/sport mode using the paddle shifters, will sometime upshift ON ITS OWN from 2nd to 3rd, or from 3rd to 4th. It also will occassionally downshift to 1st when coming to a stop (rather than stopping at 2nd), again ON ITS OWN. Its at the dealer right now to see if they can figure out what's going on, but I thought I'd ask to see if anyone else had ever had this happen?

Hawkeye · 08-13-2009, 11:21 AM

I don't know about the Zed but when I drove a 3 series it did this and it was to "protect" the engine. It would upshift on it's own if I was cruising at a higher RPM when in the shiftronic (or whatever they call it) mode.

Perhaps someone that has one could tell you if it is normal on the zed or not though..

16thBMW · 08-13-2009, 12:09 PM

Quote:

Originally Posted by Hawkeye

I don't know about the Zed but when I drove a 3 series it did this and it was to "protect" the engine. It would upshift on it's own if I was cruising at a higher RPM when in the shiftronic (or whatever they call it) mode.

Perhaps someone that has one could tell you if it is normal on the zed or not though..

That was my first thought and the tech's first question as well, but this happens a lower RPM, around 3-4k. I've only hit the rev limiter a couple of times and it DIDN'T shift when I did (or I didn't wait long enough for it to).

mike87 · 08-14-2009, 09:03 AM

i think it should adapt to your driving habits. or maybe it won't do it when the engine is fully warmed up.

The HACK · 08-14-2009, 05:15 PM

If you don't put the gear selector into "S" mode the car assumes you're only changing gears yourself temporarily and will start shifting for you again if you don't hit the paddle for a certain amount of time.

08-12-2009, 06:15 PM	#1
16thBMW Enlisted Member 0 Rep 44 Posts Drives: 2006 Z4 3.0i Join Date: Jul 2009 Location: Portland, OR iTrader: (0) Garage List 2016 Z4 35is [7.00]	Unexpected Upshifts Has anyone else had this problem with their Z4 automatic w/ paddle shifters? My '06 3.0i, when I'm driving around in manual/sport mode using the paddle shifters, will sometime upshift ON ITS OWN from 2nd to 3rd, or from 3rd to 4th. It also will occassionally downshift to 1st when coming to a stop (rather than stopping at 2nd), again ON ITS OWN. Its at the dealer right now to see if they can figure out what's going on, but I thought I'd ask to see if anyone else had ever had this happen? __________________ Driving: 15th(F25/2017 X3); 16th(E89/2016 35is) BMW's Retired: 14 BMW's (1968 1600-02, 1972 2002, E30x3, E34, E36x2, E39x2, E46, E83x2, E85) Current: 8 BMW's in Family
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08-13-2009, 11:21 AM	#2
Hawkeye Brigadier General 2070 Rep 4,365 Posts Drives: '07 Z4 Coupe, '21 X3, '16 GMC Join Date: Aug 2007 Location: Iowa iTrader: (0) Garage List 2016 GMC Sierra SLT [10.00] 2008 Yamaha R6 [9.00]	I don't know about the Zed but when I drove a 3 series it did this and it was to "protect" the engine. It would upshift on it's own if I was cruising at a higher RPM when in the shiftronic (or whatever they call it) mode. Perhaps someone that has one could tell you if it is normal on the zed or not though.. __________________ 2007 Z4 3.0si Coupe • 6 MT • Black Saphire Metallic • PP • SP 2016 GMC Sierra SLT Z71 Premium Plus 4x4 2017 Harley StreetGlide • Denim Black • V&H Tune 2021 BMW x30i • Phytonic Blue Metallic • Fully loaded
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08-14-2009, 09:03 AM	#4
mike87 Private First Class 109 Rep 129 Posts Drives: BMW Join Date: Aug 2007 Location: USA iTrader: (0)	i think it should adapt to your driving habits. or maybe it won't do it when the engine is fully warmed up.
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08-14-2009, 05:15 PM	#5
The HACK Midlife Crises Racing Silent but Deadly Class 1821 Rep 5,337 Posts Drives: 2006 MZ4C, 2021 Tesla Model 3 Join Date: Oct 2007 Location: Welcome to Jamaica have a nice day iTrader: (1)	If you don't put the gear selector into "S" mode the car assumes you're only changing gears yourself temporarily and will start shifting for you again if you don't hit the paddle for a certain amount of time.
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