Fit sport transmission
#1
Fit sport transmission
Hi fellow fit people. I am new to this forum and am a new 2009 fit sport automatic owner. I just bought a new 2009 fit sport in metallic silver 2 weeks ago and I think I made a good choice. However, as I am just learning the features of my new car something unusual seems to occur.
Here is the scenario-- I am driving along at about 20 - 25m/h.
I come to a very big hill -so I take my foot off the gas.
As I travel down hill my car seems to downshift I think to 1st gear??? Thus my car does not pick up any speed as my other car would do which is what I want it to do because it goes down hill too slow..
I always drive with the transmission in normal (d) drive mode..
Is this normal and do I have to step on the gas to go faster or is there a tranmission/computer problem. Other than this the tranny seems to shift normally..
Any comments and/or similar experiences appreciated
unfit69
Here is the scenario-- I am driving along at about 20 - 25m/h.
I come to a very big hill -so I take my foot off the gas.
As I travel down hill my car seems to downshift I think to 1st gear??? Thus my car does not pick up any speed as my other car would do which is what I want it to do because it goes down hill too slow..
I always drive with the transmission in normal (d) drive mode..
Is this normal and do I have to step on the gas to go faster or is there a tranmission/computer problem. Other than this the tranny seems to shift normally..
Any comments and/or similar experiences appreciated
unfit69
#2
My understanding is that the auto is a "grade logic" transmission. Here in Florida we don't have any hills or mountains, but I still find that the transmission still pulls the car down as soon as you step off the gas. I don't like that, my peference would be for it to "free wheel" unless I want it to downshift. You might try using "S" mode and see if it stays in 5th or 4th. Be aware that in S mode you need to use the paddle shifters or it will still function as a full automatic. hope that helps
#3
your car is fine.
first of all, you're not suppose to gas it on a downhill...and the reason the car downshifts is because it uses the engine to brake...engine braking...i drive a stick,and i downshift to slow down the car rather than applying the brakes since that will kill the brakes/ make it fade more quickly.
so essentially, the auto is doing the same as driving a stick...it is using the gears to engine brake.
correct me if im wrong guys.
first of all, you're not suppose to gas it on a downhill...and the reason the car downshifts is because it uses the engine to brake...engine braking...i drive a stick,and i downshift to slow down the car rather than applying the brakes since that will kill the brakes/ make it fade more quickly.
so essentially, the auto is doing the same as driving a stick...it is using the gears to engine brake.
correct me if im wrong guys.
#4
Just throwing in my 2 cents that this is normal behavior. In cases where I don't want it to do that, I either lightly touch the gas pedal or, if it actually downshifted, just give a tap on the paddle shifter to upshift.
#6
My understanding is that the auto is a "grade logic" transmission. Here in Florida we don't have any hills or mountains, but I still find that the transmission still pulls the car down as soon as you step off the gas. I don't like that, my peference would be for it to "free wheel" unless I want it to downshift. You might try using "S" mode and see if it stays in 5th or 4th. Be aware that in S mode you need to use the paddle shifters or it will still function as a full automatic. hope that helps
Yes the GE's auto gearbox has grade logic built into it - Honda used it as a selling point over here. Think of it as an idiot-proofing measure that will automatically perform engine braking for you and hold lower gears when necessary - in this case, going up and down hills.
#8
It's pretty clever.
#11
Well, I'm not so sure. I would think that a smart "grade-logic" transmission would understand the difference between zero degree and incline/decline. Thus during zero degree driving (i.e not going up or down a hill) the transmission would not result in engine braking during periods of no throtle. Of the four cars that I have, only my Honda will "pull the car down" when I release the gas.
I don't notice any difference between the Honda transmission and other autos I've driven (Ford, Toyota, Nissan) as far as engine braking on level roads. It's been a while since I drove a Chrysler product. They aren't known for good MPG are they?
Researching US transmission technology I'm not aware of any that "free wheel." All automatic transmissions disengage the torque-converter lock-up at some point, allowing some difference in engine speed. I suspect your other cars have torque converters with higher stall speeds. This allows higher RPMs/torque giving better performance (and less engine braking) but means a hit on fuel economy due to increased slipping.
I really don't notice engine braking when on level roads and the accelerator is released in the Fit.
If you're driving a Sport, are you shifting it yourself? This may result in the behavior you are seeing, where it would have shifted to a higher gear on its own.
#12
Steve, I notice a significant difference compared with my other vehicles. Especially at a slow speed..say traveling on a 35mph speed zone and approaching a stop sign. With my other vehicles I can just take my foot off the gas, but with the Fit I need to stay on it longer. I doubt if there is a "hit on fuel economy" with other vehicles since I can detect converter lock up and thus no slippage when using the gas. I've tried using the S mode and using the shifters, but when it comes to coasting I really see no difference.
Yes, Chrysler's are usually poor MPG vehicles, but my van gets an overall average of 20, and usually 26 on highway. Not too bad for a 3.8L. And yes, that trans was designed to unlock when you release the gas and on a level road. Designed to "up" the EPA fuel estimates I was told by a service tech. For example, driving at 45mph I can get off the gas and coast a considerable distance and loose very little speed. You really have to adjust your driving habit to take advantage, and maybe thats why I feel such a difference.
Yes, Chrysler's are usually poor MPG vehicles, but my van gets an overall average of 20, and usually 26 on highway. Not too bad for a 3.8L. And yes, that trans was designed to unlock when you release the gas and on a level road. Designed to "up" the EPA fuel estimates I was told by a service tech. For example, driving at 45mph I can get off the gas and coast a considerable distance and loose very little speed. You really have to adjust your driving habit to take advantage, and maybe thats why I feel such a difference.
Last edited by Spacecoast; 10-14-2009 at 07:13 PM.
#13
Most cars including Honda don't lock-up the torque converter until over 50MPH.
The Fit seems to lock-up at lower speeds but I have nothing to base this on other than a feeling and watching the tach. It seems to unlock readily when releasing the gas and not on a down-slope.
I paid attention this morning. Releasing the gas at 35-40MPH, the RPM's drop to about 1,000 and there isn't noticeable engine braking, except one time when I was accelerating moderately and abruptly released the gas; there was momentary engine braking before the lock-up released (or shifting to a higher gear?) but I was also on a slight downward slope when that happened.
Maybe your TCM (PCM?) is failing to unlock the torque converter when it should. I'd expect it to throw a code (P0740 on Hondas) if this were happening but that code is usually failing to lock the converter. If it weren't unlocking you'd be stalling the engine.
Might be a faulty grade sensor (PCM again) and putting you in a lower gear when you could be in a higher gear?
Either way it's worthy of having checked at Honda.
Nobody thought my US Transmission Technology link was funny? ahhhhh I slay me...
The Fit seems to lock-up at lower speeds but I have nothing to base this on other than a feeling and watching the tach. It seems to unlock readily when releasing the gas and not on a down-slope.
I paid attention this morning. Releasing the gas at 35-40MPH, the RPM's drop to about 1,000 and there isn't noticeable engine braking, except one time when I was accelerating moderately and abruptly released the gas; there was momentary engine braking before the lock-up released (or shifting to a higher gear?) but I was also on a slight downward slope when that happened.
Maybe your TCM (PCM?) is failing to unlock the torque converter when it should. I'd expect it to throw a code (P0740 on Hondas) if this were happening but that code is usually failing to lock the converter. If it weren't unlocking you'd be stalling the engine.
Might be a faulty grade sensor (PCM again) and putting you in a lower gear when you could be in a higher gear?
Either way it's worthy of having checked at Honda.
Nobody thought my US Transmission Technology link was funny? ahhhhh I slay me...
Last edited by Steve244; 10-15-2009 at 12:08 PM.
Thread
Thread Starter
Forum
Replies
Last Post
Mtwalenciak
2nd Generation (GE 08-13)
5
09-01-2014 05:30 AM
nullzero
2nd Generation (GE 08-13)
8
10-11-2008 11:39 AM