I have an '05 AT and was driving to work this morning and went to shift from 3rd gear to 4th gear, but instead I pushed the gear shift towards 2nd. No problems, as the transmission did not switch into second, as expected since I was doing > 50 MPH. However, I realized this quickly and then pushed the gearshift in the correct direction, but had to try twice to get it into fourth. I don't think there was a problem, I think that the first try was "cancelling" the 2nd gear request. The entire sequence of events only took 1/2 second. So my question is, does anyone know how long the transmission will "remember" improper shifting commands?

Thanks

 

around one or 2 seconds...what happens is...sometimes when im in 3rd gear and im around 3-4 rpm ill down shift and itll blink once or twice and if u let off the gas itll go below 3-4rpm and it will shift into 2nd......im not sure if i answered ur question but i hope it helps

 

I'm not sure if many/any of us would even know the answer to your question..... Where's an Acura Trans engineer when ya need one..

Anyway, the "computer" remembers the way you drive and can set shift points/facilitate transmission operation etc. "I myself" wouldn't' think the trans is intuitive enough to tell the computer you attempted to shift to an improper gear. But then again, it's "thinking" in the sense that it wouldn't let you thus may "log" the event..
Are you worried it set a code or something??
I also believe your theory of what took place is correct. The trans/computer just took a few milliseconds to figure out what you were trying to accomplish, keep you from doing something that could harm "itself", then finally get to 4th due to your "command" :-)

No harm done.

 

doesn't the dash light up the selected gear. even if its the wrong gear shouldn't it light it up for a couple of seconds and then drop back to the corrected one? i am assuming this is what happens. i have a 6MT so if you miss shift there really is no safety feature.

 

I don't use the sport shift feature on my car, but I played with it a bit on a loaner once. I was able to put the car into any gear I wanted. I could drop to 2nd from 5th and then go back up again, no problems. With the exception of the 1-2 shift that is automatic, you are free to move the transmission to any gear you want whenever you want. Well, at least I could on the the loaner...

 

I didn't see that. Possibly this exchange happened so fast that the dash didn't keep up.

 

Let me guess. You were going about 45 mph?

Try shifting down to 2nd gear when you're cruising at 80 in fifth. Not gonna happen.

 

Not really related but hopefully not a complete thread jack.

When you guys are using the sport shift do you back off the gas pedal when up-shifting?

 

why would you? do you left off the gas normally when the car is about to shift? this is an auto not a manual, and you don't need to let off the gas unless you want to slow down

 

Concur, but I found the converse is true, that if you don't step on it when downshifting, the car jerks a bit.

 

This goes back to when this type of tranny was first created by Porsche. If the computer believes a shift will cause damage to the engine it will not let you perform a down shift. The indicator will blink and you have so many seconds to get the engine rpms below a certain point. If that happens then your selected gear will be given. If not then you'll stay in our current gear.

Porsche devised this set up so that a driver would make a gear change in mid-corner that could cause the tail of a 911 to swing out. It goes with out saying that any Honda product save for the NSX and S2k will not have such a problem.

 

he was probably thinking that if you didn't let off the gas when shifting up would be like powershifting in MT... which is what really happens (i.e. you chirp your tires when doing 1st to 2nd with the gas pedal to the metal).

thanks for the informative post, precision crafted. btw, that's some wishful thinking in your sig... only if, eh?

 

I don't know, for some reason it feels like I'm getting slippage when shifting manually. I thought maybe thinking of it more like a MT might be the answer. But you're right, it really doesn't make much sense.

 

SH-AWD is coming to the TL then question now is when. When I test drove the new 3 the BMW salesman stated that on his ride and drive they drove the 3's major competitors and all BMW sales reps loved the TL! He said that comments were very good regarding our car, but the handling needed to be better. That my friends can only happen with RWD (yea right) or SH-AWD.

 

Understeer and throttle lift??

Downshifting in mid-corner will introduce a sudden increase in torque to the front wheels and it will cause understeer. An ordinary driver would let off the throttle, and if the car is moving fast enough, the throttle lift could spin out the car.

 

I will admit that I was not too clear on what I typed. It was years ago when Porsche came out with Tiptronic. I do remember reading that the retarded change of gears was built in because some drivers would attempt to make a gear change that would creat a loss of control. It was ment to be a safty feature. The only thing Acura did better then Porsche was make the gear changes faster. Porsche has since out performed Acura. Anyway, Tiptronic was created in an age when inexperienced drivers would wreck their cars due to 911's being tail happy. It is not so much a concern now.

I believe Acura keeps the "idiot" program so that an owner will not over rev the motor which is kinda difficult since you can "bounce" off of the rev limiter all day long in 2nd and nothing happens. I did that a lot with my '02 TL. People were impressed with Honda's enginering.

 

Yeah, if you're simply not upshifting. But accidentally downshifting to 2nd at like 80 mph = bye bye valves. Definitely nice to have a computer watching over you in case you screw up.

 

Pure Adrenaline

You are so right. It is nice to have the computer to keep us "safe".

I would like to have the ability to shift into 2nd myself though in the TL.