Transmission down shifting issue - Fuzzy logic
#16
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DS actually behaves like D until the car senses "agressive" driving, then the transmission shifts aggressively. BUT, it calms back down after a complete stop and will drive like D again.
example 1: if you are in DS mode and make a fast stop while doing 65mph, your tach will jump through the roof (possibly giving your passenger a heart attack). but it will behave again after you have come to a complete stop and begin moving again.
example 2: if you are in DS mode and accelerate "normally", the car will behave like it is in D mode shifting through all gears (at least in my 5AT). But if you nail the gas from a dead stop, the car will hold the gear all the way to redline before shifting. I don't reacall mine ever shifting into 5th while doing this (because I've already accomplished what I wanted to do by 4th gear), so I'm not sure what will happen in the 7AT.
DS works in stop and go as long as you know what will happen, but I prefer the paddles.
example 1: if you are in DS mode and make a fast stop while doing 65mph, your tach will jump through the roof (possibly giving your passenger a heart attack). but it will behave again after you have come to a complete stop and begin moving again.
example 2: if you are in DS mode and accelerate "normally", the car will behave like it is in D mode shifting through all gears (at least in my 5AT). But if you nail the gas from a dead stop, the car will hold the gear all the way to redline before shifting. I don't reacall mine ever shifting into 5th while doing this (because I've already accomplished what I wanted to do by 4th gear), so I'm not sure what will happen in the 7AT.
DS works in stop and go as long as you know what will happen, but I prefer the paddles.
#18
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#20
I think when Acura, Lexus and Infiniti merge into one company, you'll be able to "build your own car" by selecting everything from exterior, engine, transmission, interior... Then there will be less complaints
Seriously, the DS mode is great. If you have to complain something about it, it should be the delay when you go from D to DS and immediately floor it. Other than that, I love the mode.
Seriously, the DS mode is great. If you have to complain something about it, it should be the delay when you go from D to DS and immediately floor it. Other than that, I love the mode.
#21
This goes beyond engine braking...the 2-3 shift in DS can sometimes be like a sloppy clutch dumpped shift = huge jerk (I actually thought someone tapped my bumper the first time it happened). I only drive in DS when in local and save D for grandpa highway floating... the 7at programming SUX! DS mode is trying to be sport and hold gears (and even then, it lags sometimes) try to pass in jus D forget it - you have better change ina VW GTI...sad. A $40+k car trans has no shot vs my old $20k+ TSX trans...lesson learned go 6spd man next time...
#22
i agree, the downshifts are very jerky and aggressive.
i was in a friends c63 amg recently which has significantly more hp than our g37's and it was nowhere near as jerky as ours.
it';s got nothing to do with "sportiness" or hp, it's poor programming which needs to be fixed.
i was in a friends c63 amg recently which has significantly more hp than our g37's and it was nowhere near as jerky as ours.
it';s got nothing to do with "sportiness" or hp, it's poor programming which needs to be fixed.
#23
#24
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DS actually behaves like D until the car senses "agressive" driving, then the transmission shifts aggressively. BUT, it calms back down after a complete stop and will drive like D again.
example 1: if you are in DS mode and make a fast stop while doing 65mph, your tach will jump through the roof (possibly giving your passenger a heart attack). but it will behave again after you have come to a complete stop and begin moving again.
example 2: if you are in DS mode and accelerate "normally", the car will behave like it is in D mode shifting through all gears (at least in my 5AT). But if you nail the gas from a dead stop, the car will hold the gear all the way to redline before shifting. I don't reacall mine ever shifting into 5th while doing this (because I've already accomplished what I wanted to do by 4th gear), so I'm not sure what will happen in the 7AT.
DS works in stop and go as long as you know what will happen, but I prefer the paddles.
example 1: if you are in DS mode and make a fast stop while doing 65mph, your tach will jump through the roof (possibly giving your passenger a heart attack). but it will behave again after you have come to a complete stop and begin moving again.
example 2: if you are in DS mode and accelerate "normally", the car will behave like it is in D mode shifting through all gears (at least in my 5AT). But if you nail the gas from a dead stop, the car will hold the gear all the way to redline before shifting. I don't reacall mine ever shifting into 5th while doing this (because I've already accomplished what I wanted to do by 4th gear), so I'm not sure what will happen in the 7AT.
DS works in stop and go as long as you know what will happen, but I prefer the paddles.
Question to all. In Da mode when approaching a stop light at about 40mph, i light break to about 25 and coast until i need to break again. During the coast, it feels like the tranny prematurely shifts from 4th to 3rd (i think, or else it's 3 to 2) i expect some rpm jump, but it almost makes my head hit my headrest every time. my foot is on the break the whole time, just not depressing a lot. wondering if anyone else has this happening.
#25
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Question to all. In Da mode when approaching a stop light at about 40mph, i light break to about 25 and coast until i need to break again. During the coast, it feels like the tranny prematurely shifts from 4th to 3rd (i think, or else it's 3 to 2) i expect some rpm jump, but it almost makes my head hit my headrest every time. my foot is on the break the whole time, just not depressing a lot. wondering if anyone else has this happening.
#26
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This will change as you drive it more. My DS mode is now very similar to my D mode when I am not pushing it. If I start pushing it a little though, it is more responsive and will hold the RPMs higher than D will. I actually like the way the transmission reacts better now than when I first got it.
#27
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Question to all. In Da mode when approaching a stop light at about 40mph, i light break to about 25 and coast until i need to break again. During the coast, it feels like the tranny prematurely shifts from 4th to 3rd (i think, or else it's 3 to 2) i expect some rpm jump, but it almost makes my head hit my headrest every time. my foot is on the break the whole time, just not depressing a lot. wondering if anyone else has this happening.
It takes a bit to get used to, but it's still a bit annoying.
BTW, I'm new to the forums. Been driving my 2010 G37 for 3 weeks and I LOVE it
#28
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are you talking about D or DS? my 2010 used to downshift aggressively but it has not done that in months. The transmission adapts to your driving habits.
#29
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#30
This is an old topic. Search the previous threads. The 7at has very steep gears 1-3 and this downshift is going to be apparent. There is a reason for it, low end torque for the 3.7 is not going to be like a 6 liter v8, so they compensate with gearing.
If you were somehow to allow 4th to stay engaged to under 25 mph and then need to resume speed it would stumble all over itself trying to get into the proper gear, so that is why the seemingly agressive downshift pattern.
Ever try taking off hard from a stop at a corner and having the rear tires break loose at the 1-2 shift before you can get more than 50ft?
CLOSE, STEEP lower gears.
This car might actually would have been more driver friendly with a 6at and more widely spaced gear pattern. But I will take what I have.
I somewhat envy the manual for driving purposes, but my knees appreciate the AT.
If you were somehow to allow 4th to stay engaged to under 25 mph and then need to resume speed it would stumble all over itself trying to get into the proper gear, so that is why the seemingly agressive downshift pattern.
Ever try taking off hard from a stop at a corner and having the rear tires break loose at the 1-2 shift before you can get more than 50ft?
CLOSE, STEEP lower gears.
This car might actually would have been more driver friendly with a 6at and more widely spaced gear pattern. But I will take what I have.
I somewhat envy the manual for driving purposes, but my knees appreciate the AT.