Superstar555

Sorry to dredge this up, but HSA has had me stall the car 4 times in 2 days. I've had manual cars and motorcycles for the last 25 years and don't remember killing any of them.

My driveway is short and steep, and it seems I need WAAAAAY too much gas to overcome HSA. Feels like I'm riding the clutch too much trying not to put the front end of my Vette thru the back garage wall with the amount of gas it takes.

What's the secret?

BJ67

Yes indeed, that hill assist should have a on - off switch. If you are in neutral and slip it into 1st gear and immediately take off , usually you beat the hill assist activating. If you sit in your steep driveway or on a hill with the car in first gear and foot on the brake, its already activated.

You can also just remove your foot off the brake and wait for the release (you will feel it) and than take off. I believe its a second or two of hold.

IMO another reason for a stall is because the off idle "tip in" is slow and unresponsive on the corvette. Any RPM above 1000 or off idle, the throttle is what I consider relatively normal on light throttle application, below that its dead.

Foosh

I have never had any issues with it. It's an easy and instant release. Of course, even on a hill I'm able to time clutch engagement before I even feel it holding 99% of the time.

I also disagree that throttle response is slow. It's as fast as any NA car I've ever driven.

Superstar555

So you drive it through the brakes.

Once you release the brake pedal, the brake itself is still ON, which means either you are waiting several seconds for it to release, or you are powering through the still-applied brake.

TEXHAWK0

Try just starting up on a hill like you would if the assist was not on...
or just pause a little longer before releasing the clutch to give the brake time to release.

BJ67

I find the release of the HSA to slow, I already start clutch engagement before it releases and that creates stall tendencies for me. I agree throttle response is satisfactory for most driving experiences. But I have noticed from day one, throttle tip in off dead idle RPM at very light throttle application is hesitant. The electronic connection between the gas pedal and the throttle body is no where near linear compared to mechanical linkage or cable. I have no issues driving my 2015 manual stingray and love the experience each and every drive as I adjust accordingly. My seat of the pants sensitivity is just very very sensitive.

Boiler_81

I have the same issue with the hill assist. It seems as if it takes forever for the brake to release.

Some people also report they don't manually release the parking brake, it will release for them and they drive off. When I try driving through the e-brake, it grabs and I have to use too much throttle or I kill the engine.

I would love to know how the brake determines when it should release.

Roadrogue

mschuyler

I find the hill assist to be kind of tricky. Try using the E-Brake instead. It's a good alternative and will release when you start forward with no ill effects.

Avanti

I learned to drive Studebakers with "HillHolders" long before the electronic versions so I've had no problem all these decades later with the GM version. Never stalled one then or now

So I]m suggesting, Practice, Grasshopper, practice!

BJ67

The only manual trans stude I had was a R1 63 black 4 speed Avanti (no Hill Holder). Had a 57 golden hawk, 64 GT hawk, A R2 63 Avanti and a 64 R1 Avanti all with automatic trans. Learned to drive a stick in 1964 on a 50 chevy and many,many manual cars after that and old school trained myself to start off on a hill with out roll back. So the HSA does interfere with my driving style

Greg00Coupe

I wonder if there is any adjustment to this feature? On both my c7s they work flawlessly.

Never really knew it was engaged, just occasionally when I was on a severe hill

Seems some have issues others don’t which indicates there could be some adjustment available?

Or maybe it’s realibility due to different driver skills?

Frosty

Mine works so well that I can't even tell when it is engaging and disengaging. It just stops me from coasting back.

Zaphod B

My Jeep Wrangler also has hill assist. In both cars, the point is to "drive through the brakes," as you put it, although your phrasing isn't accurate. The brakes release automatically once you impart motion to the vehicle. So you are not driving against brake force for more than a fraction of a second.

Edit: I find hill assist in the 'Vette to be very easy to adapt to and have not stalled mine yet starting from a stop going uphill with HA engaged, although I have managed (to my shame) to stall it several times on level ground.

Boiler_81

Interesting, that is certainly not my experience. I find mine to be very intrusive. It just doesn't seem to release in a timely fashion.

nytrorcr

Practice-Practice-Practice.....that's all I can say. Mine works flawlessly for me. I started driving a Datsun 610, stick, no hill assist in 1969 got real good at starting on hills. The vette's HA is so easy to use, when you learn to trust it to hold you, you'll love it.

defaria

I think people are over thinking this. I simply imagine I'm not on a hill an proceed as if I'm on a flat road. Works like a champ.

Skid Row Joe

All ^^^^ my experience with it too.

I don't recall killing it when starting off with the hill assist in operation.

I'm sure not an expert either. Just a lot of experience long ago with sticks in my late teens at jobs during the Summer driving local delivery trucks in Omaha, NE while in school.

Steve Carter

I love it!

Foosh

No, I don't "drive it through" the HSA or wait for it to release. I honestly wouldn't even know there is an HSA, except for having tested it a few times by waiting and watching it hold, because I'm normally instantly in motion. That was true on both my 14 and 18, and I don't add more than a little throttle on a hill either because there is so much low end torque even barely above idle. On flat ground, you don't need to add any throttle with proper clutch engagement.

Whenever this issue has come up in the past, I've always been puzzled because I just don't feel any resistance and have never stalled. I've just assumed it's a function of timing coupled with smooth, quick clutch engagement, which does take practice.

My suspicion is that once you've let it rock back a little because of a slow clutch engagement, it may take a little more effort to disengage. I don't think it actually clamps down fully until you let it start to roll back a little. I just don't ever let that happen, and it's become purely a natural reflex.