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      01-09-2008, 02:19 PM   #1
dirtyk
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SMG owners - downshift blipping?

Drove an '04 SMG the other day, mint condition, 21K miles, loaded. I noticed when downshifting it wouldn't blip the throttle from third to second. Being excited and high on 2 Redbulls, I dont remember if it was blipping into first either. It sort of felt like downshifting with a normal tiptronic; downshift and you can feel the transmission sort of slow the car down but no blip. I was expecting to pull the downshift paddle, have a nice rev match and engage into the previous gear. It would select the previous gear, but wouldn't engage until I pressed the gas. Perhaps it needs a software update?


I've been in the same year 330i with SMG I and it had crazy downshift blips! I also tried changing the gear changes to S5 and even tried S6 briefly but wasn't really paying attention to the blipping in S6 because it was raining out, and RWD + rain + not my car I didn't want to crash the beautiful M3.

Kind of dissapointed in that, but very happy with the other aspects of SMG II. Considering all the negative shit people say about it, I found it a great piece of machinery.

Thanks!!
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      01-23-2008, 05:14 AM   #2
JIO
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You have to be on throttle for the blip downshifts. It will not blip on downshifts without your foot on the gas. That's the way it works. SMG figures if your foot is off the gas, you are slowing down and there is no need to blip the gas.

Try cruising in S5 at about 40mph in 3rd gear.Then start to accelerate by just just using the throttle. While keeping your foot into it, downshift to 2nd....you will get a perfect blip and the car will shift smoothly.
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      01-26-2008, 04:01 AM   #3
mrtm2005
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Thumbs up

It is called rev matching. It is the engine/tranny software matching your speed from one gear down to the other without any disruption in power.
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      01-29-2008, 06:43 PM   #4
RJKriner
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I have a 2003 M3 with SMG, 50,750 mile. When starting out in 1st gear the gear has a tendency of feeling like a clutch is slipping, is this normal for starting out? If I start out slowly this is not a problem only when you want to give it the gas.
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      05-16-2008, 12:44 PM   #5
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normal operation...
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