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Rolling back on hill

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Old 04-09-2014, 01:43 AM   #1
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Default Rolling back on hill

My parking spot at work is in the basement. There is a gate in the middle of the up hill. I have to stop and flash my card and wait for the gate to be open and then drive out. At the gate, when I released the breaks my car would roll back. I was very surprised. It wasn't really sharp hill at all.
Previously I had Japanese cars and I drove that ramp many times and I never had this. And I thought automatic shift doesn't do that. Am I wrong?
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Old 04-09-2014, 05:55 AM   #2
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AFAIK, there is supposed to be a hill holding feature on the A6 that will momentarily hold the car while you move your foot from the brake to the accelerator. In your case, the obvious possibilities are:

- the hill isn't steep enough to engage that feature
- you're wanting it to hold too long and it's letting go
- or there is a failure and it should be checked by the dealer.

Will be interested to learn what you determine is the issue.
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Old 04-09-2014, 10:58 AM   #3
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Quote:
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AFAIK, there is supposed to be a hill holding feature on the A6 that will momentarily hold the car while you move your foot from the brake to the accelerator.
That would be your left foot.
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Old 04-09-2014, 11:46 AM   #4
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My 2013 A6 Prestige has hill hold (as did my 2010 A4 Premium Plus). Firm brake on the hill, it holds fine indefinitely until I pull away.
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Old 04-09-2014, 12:58 PM   #5
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The 2.0T may have a very loose torque converter. Its a very small turbo motor, so it needs to be able to get the revs up quickly so it doesn't trip over itself. If they give it a higher stall speed, the converter will allow the motor to spin up quickly and get into boost. Unfortunately, a higher stall means a looser converter, so it may not hold the car in place on an incline.
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Old 04-09-2014, 01:54 PM   #6
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Quote:
Originally Posted by James517 View Post
AFAIK, there is supposed to be a hill holding feature on the A6 that will momentarily hold the car while you move your foot from the brake to the accelerator. In your case, the obvious possibilities are:

- the hill isn't steep enough to engage that feature
- you're wanting it to hold too long and it's letting go
- or there is a failure and it should be checked by the dealer.

Will be interested to learn what you determine is the issue.
This is correct.

Also, it appears that the OP has the CVT which has a multiplate clutch and not a torque converter, so it does not constantly apply drive creep. If the hill hold feature is not holding the car, there may be a split second delay while the clutch engages, during which the car may roll back.

In these cases, it would be a good idea to engage the electronic parking brake. It will hold the car and release automatically once you press the gas pedal.
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Old 04-09-2014, 04:07 PM   #7
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My 14 Pretige has hill hold, even as I coast toward my driveway waiting of the garage to close the hill is slight, but I feel the hold kick in and stop the car and when I hit the gas I feel the brakes let go.
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Old 04-09-2014, 04:16 PM   #8
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Originally Posted by newmoon View Post
This is correct.

Also, it appears that the OP has the CVT which has a multiplate clutch and not a torque converter, so it does not constantly apply drive creep. If the hill hold feature is not holding the car, there may be a split second delay while the clutch engages, during which the car may roll back.

In these cases, it would be a good idea to engage the electronic parking brake. It will hold the car and release automatically once you press the gas pedal.
I thought only the Premium was available with FWD and the CVT? Premium Plus should be a Quattro with the 8 speed auto.
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Old 04-09-2014, 04:47 PM   #9
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No, they offer a Premium Plus CVT as well.
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