Rolling forward when in reverse ?
#1
Rolling forward when in reverse ?
Now I haven't tried to see how far forward our HCHII will roll while in reverse, but it certainly will. We have a steep (uphill) driveway. If I put our 06 Hybrid in reverse to back up the hill without pressure on the gas pedal, the rascal will roll forward. This is the only automatic transmission I've ever had, some I'm used to a car that will roll while in gear, but this surprised me. Should it do this and if so, why?
#2
Re: Rolling forward when in reverse ?
We have a sloped driveway also. Our previous vehicle ('99 Tahoe) had a hillholder gear on it that prevented it from slipping forward while in reverse for backing up the driveway. But both of our new hybrids (FEH & HiHy) don't. I'm sure it has something to do with the new Electronically Controlled Variable Transaxles (ECVT).
#3
Re: Rolling forward when in reverse ?
We went to the movies about a month ago and when I went to park the car I wanted to line up in the space and when I went to go in reverse, the vehicle rolled forward and the front steel frame hit the parking curb. I thought I crushed the front of my car. Now I use my handbrake in combination with the accelerator to avoid a situation like that one again.
#4
Re: Rolling forward when in reverse ?
As far as I konw, the reason behind this is because unlike a standard auto, the CVT uses a computer controlled clutch-pack, rather than a fluid torque converter, to prevent stalls. This means to keep the car from stalling out, it will open the clutch at very low speeds when not accelerating, allowing it to roll. I notice the same thing with rolling backwards slightly on hills when coming out of auto-stop in my HCH-I.
Holidn the brake or e-brake like might be done on a manual car on a steep hill to prevent rolling should work.
Holidn the brake or e-brake like might be done on a manual car on a steep hill to prevent rolling should work.
#5
Re: Rolling forward when in reverse ?
Originally Posted by SamIV
Now I haven't tried to see how far forward our HCHII will roll while in reverse, but it certainly will. We have a steep (uphill) driveway. If I put our 06 Hybrid in reverse to back up the hill without pressure on the gas pedal, the rascal will roll forward. This is the only automatic transmission I've ever had, some I'm used to a car that will roll while in gear, but this surprised me. Should it do this and if so, why?
#6
Re: Rolling forward when in reverse ?
when you stop at a traffic light or whatever, and you are going uphill, autostop kicks in, and when you release the break to put your feet on the gas pedal, the car just rolls back. That was a big surprise for me first time it happened. Now, i know it should do that but not that much it did. I think I rolled back a foot or more and the guy in tha back got scared... he flashed me his lights... since then, in this situations, I use handbrake gently, just enough to keep the car there until I have enough gas on.
#7
Re: Rolling forward when in reverse ?
Originally Posted by masgian
when you stop at a traffic light or whatever, and you are going uphill, autostop kicks in, and when you release the break to put your feet on the gas pedal, the car just rolls back. That was a big surprise for me first time it happened. Now, i know it should do that but not that much it did. I think I rolled back a foot or more and the guy in tha back got scared... he flashed me his lights... since then, in this situations, I use handbrake gently, just enough to keep the car there until I have enough gas on.
#9
Re: Rolling forward when in reverse ?
Originally Posted by ElanC
In fact, even with my foot off the pedal, the brake stays engaged until the engine revs up. So there's plenty of time, about one second, to get your foot off the brake and on to the gas pedal before the brakes are released.
#10
Re: Rolling forward when in reverse ?
Originally Posted by masgian
when you stop at a traffic light or whatever, and you are going uphill, autostop kicks in, and when you release the break to put your feet on the gas pedal, the car just rolls back. That was a big surprise for me first time it happened. Now, i know it should do that but not that much it did. I think I rolled back a foot or more and the guy in tha back got scared... he flashed me his lights... since then, in this situations, I use handbrake gently, just enough to keep the car there until I have enough gas on.