G37 7speed transmission reprogram
#121
Registered User
I'm in the same position. I can't decide if i want to get this reflash or not. I'm at 6500 miles and it is definitely better than when it was new. Still some jerky and lag, but much improved over time. I am due for 2nd service soon, so I'm still debating if i want this done.
God Bless America: Only here do we have such decisions to make. LOL....Oh yes, what to have for Lunch too...
My remaining issue is the hesitation at braking and then quick step on the gas, not always though...
#122
I'm in the same position. I can't decide if i want to get this reflash or not. I'm at 6500 miles and it is definitely better than when it was new. Still some jerky and lag, but much improved over time. I am due for 2nd service soon, so I'm still debating if i want this done.
#123
Guys sometimes when i decelerate quickly the car clunks into 1st almost like the transmission can't downshift quickly enough ( or rather smooth enough). The clunk to first doesn't happen always and it is usually when i reach 35-45ish then slow down rapidly. Anyone else having this issue?
#124
Guys sometimes when i decelerate quickly the car clunks into 1st almost like the transmission can't downshift quickly enough ( or rather smooth enough). The clunk to first doesn't happen always and it is usually when i reach 35-45ish then slow down rapidly. Anyone else having this issue?
#125
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Join Date: Dec 2010
Location: Maryland
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Has anyone every experienced somethign similar to this but just the car feeling heavy vs light. Ocasionally when I am driving (on my commute, so same road), and even though I'm driving it in DS, and I hit the gas, it just takes SO LONG to accelerate (like it's not giving full throttle, and yes I know there's WOT restriction but that's not it because other times at same speed it's full gas when I hit it and it just goes). And it's in all gears, so even if I pick a gear manually even a low gear it's the same issue.
When I reset the AFR targets (with the cipher software from Uprev), it seems to go away, but then comes back (it also goes away on its own).
When I reset the AFR targets (with the cipher software from Uprev), it seems to go away, but then comes back (it also goes away on its own).
#126
Movin On!
iTrader: (13)
I'm in the same position. I can't decide if i want to get this reflash or not. I'm at 6500 miles and it is definitely better than when it was new. Still some jerky and lag, but much improved over time. I am due for 2nd service soon, so I'm still debating if i want this done.
Keep those replies coming after you've got the reflash, it'd be nice to get a consensus.
#127
I've had it clunk into 1st, 2nd and 3rd. Even in Park. But when I bring it to the dealer it all magically disappears. It most frequently happens in stop and go traffic on a slight incline. As previously mentioned, quick transitions between acceleration and braking leds to clunky shifts. But if you pay attention to the shifts I've noticed that when I release the accelerator just as the tranmission is about to upshift or downshift thats when the trans shifts bad. It's hard to avoid this since in casual or traffic driving the car shift 3 times before hiting 25mph and I think 4 is around 35mph. I think the gear hunting that people talk about is the transmission shifting gears at a speed that would normally not require a shift in a 5sp auto.
#129
Registered User
I've got no idea, but from what I understand it appears to address issues that manifest during D driving. For example in manual mode, I can make my car coast much better than it does in D. To be honest, the real issue for me is the excessive engine breaking when the car should just be coasting, it seems to kick in right around 20-25km an hour. It's annyoing as heck and makes the car's momentum just die. If I could get that addressed I'd be pretty happy - all the other quirks my transmission had disappeared as it adjusted to my driving style over break-in.
#130
Registered User
Proof: the tranny shifts beautifully in Snow Mode.
Last edited by Marc Collins; 01-06-2011 at 02:43 PM.
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carguy87 (07-19-2019)
#132
Registered User
The only issue that doesn't seem opinion/preference-based, from reading this thread, is the lag that occurs when changing from a steady-state speed to needing significant acceleration. Trying to pass on the highway is the classic scenario.
Can those who have had the update done please confirm as soon as possible whether this common issue has been resolved or not? I doubt it will be, because the problem stems from the tranny not knowing how many gears down to shift under a sudden throttle application situation. With only four or five gears total, it's a pretty easy decision. When you get to seven or eight, it's much tougher.
I think they are trying to avoid a situation where you are driving at 50 mph/80 km/h, stuck behind some slow-poke, in 7th gear, of course, for fuel economy reasons, then go to pass and stomp the throttle and the tranny shifts back to 5th gear...but then once you get moving and are accelerating swiftly (but not swiftly enough), it realizes you need to go back to 4th gear. Avoiding the shifting down mid-action is the goal. Unfortunately, that means hesitation at the outset while it figures out what you need/want. The exaggerated throttle response means that even if you floor the throttle, the car was already overreacting from the initial moment you started pushing the pedal. Hence all the reports that the car responds so well when you DON'T floor it. That's because the throttle application is being sent as torque immediately to the tranny, instead of being held back waiting for the tranny to decide what gear to go in to.
I am guessing the "half-way between old mode and Snow Mode" throttle mapping that seems to be what people are describing is the only "fix" for this. And it is't a fix, it just reduces the amount of times or severity of the tranny overreacting to a too-sensitive throttle. You can solve the problem yourself by just applying the throttle more smoothly.
Reducing the responsiveness of the tranny just slightly to downshift based on throttle input should solve the 20 - 40 mph issues.
However, if they took away the relatively aggressive engine braking in the process, then there is nothing sports sedan left in the car. May as well drive a Camry.
I will await more reports from those who update, but the lag and shifting can mostly be resolved by driving more competently/smoothly. You cannot bring back the engine braking no matter what. Therefore, at the end of the day, a dumbing-down of the car that I will avoid.
Can those who have had the update done please confirm as soon as possible whether this common issue has been resolved or not? I doubt it will be, because the problem stems from the tranny not knowing how many gears down to shift under a sudden throttle application situation. With only four or five gears total, it's a pretty easy decision. When you get to seven or eight, it's much tougher.
I think they are trying to avoid a situation where you are driving at 50 mph/80 km/h, stuck behind some slow-poke, in 7th gear, of course, for fuel economy reasons, then go to pass and stomp the throttle and the tranny shifts back to 5th gear...but then once you get moving and are accelerating swiftly (but not swiftly enough), it realizes you need to go back to 4th gear. Avoiding the shifting down mid-action is the goal. Unfortunately, that means hesitation at the outset while it figures out what you need/want. The exaggerated throttle response means that even if you floor the throttle, the car was already overreacting from the initial moment you started pushing the pedal. Hence all the reports that the car responds so well when you DON'T floor it. That's because the throttle application is being sent as torque immediately to the tranny, instead of being held back waiting for the tranny to decide what gear to go in to.
I am guessing the "half-way between old mode and Snow Mode" throttle mapping that seems to be what people are describing is the only "fix" for this. And it is't a fix, it just reduces the amount of times or severity of the tranny overreacting to a too-sensitive throttle. You can solve the problem yourself by just applying the throttle more smoothly.
Reducing the responsiveness of the tranny just slightly to downshift based on throttle input should solve the 20 - 40 mph issues.
However, if they took away the relatively aggressive engine braking in the process, then there is nothing sports sedan left in the car. May as well drive a Camry.
I will await more reports from those who update, but the lag and shifting can mostly be resolved by driving more competently/smoothly. You cannot bring back the engine braking no matter what. Therefore, at the end of the day, a dumbing-down of the car that I will avoid.
#133
Registered User
#134
I've tried to smoothly apply the throttle and like Fish said in the NYC area its real hard to do. I do like the engine braking, but I don't want so much of it in the D mode. I agree that this is a sport sedan and thats what the DS or manual mode should be used for. I use to drive a manual car and the way this car shifts just isn't right. Then when I try to shift on my own it decides to downshift for me so there's no way out. If this car was offerred with an AWD manual I would have bought that.