Does anyone know???
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Team Owner
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From: Spring Texas
Does anyone know???
In the various DCT vids they always say to not creep the car, like when stuck in traffic. Does anyone know the slowest car speed for full clutch engagement in first gear?
E-Ray, 3LZ, ZER, LIFT
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From: NE South Carolina
BUT now I have found a great was to set Z MODE that makes it a different car. I have Steering, Brakes, Ride set to my normal Sport BUT Power set to Track. In Track: 1) as in Manual Mode it never goes into V4, 2) shifts at a higher rpm when accelerating even modestly, 3) seldom goes past 5 gear up to ~65+ mph and 4) Down shifts starting at a higher rpm when braking. So I can be in Drive mode and have it perform as I drove my two C7s and when using Manual Mode.
I now "live with the modest clutch slipping" when going slow in 1st. Tadge said it will not cause excessive wear. It is the outer, larger of the two clutches. But as I pull into my tight garage it's a bit jerky as the clutch slips and grabs. Not a big deal.
Last edited by JerryU; Nov 6, 2020 at 12:08 PM.
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Team Owner
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From: Spring Texas
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When the car was introduced, GM said the transmission is designed to creep a little bit, so it feels like a normal automatic It has multi-plate wet clutches that you're not likely to ever wear out. Just drive it.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
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From: NE South Carolina
^^^
I don't agree! If in bumper-to-bumper traffic (something for the last 35 years I very seldom have to do when at home) and expect it to operate like a "slushbox" you'll be upset as some have posted!
My suggestion is what I did with my standard shifts in that situation (I have only had standard shifts for DD's in 60 years until the C8, many times in areas where there was that foolish traffic!) You don't move to stay on the car it fronts bumper at a creep. Wait a car length or two then move (except when in NYC where some AH will try to move in so you leave a maximum of 3/4 of a car!
) BUT don't just apply moderate brake pressure as you would in a car with a torque converter and "creep" the car forward! Yep the C8 DCT is slipping the 1st gear clutch slightly and it's not the smooth (inefficient) power transmission of a "Slushbox!" So leave a car length or so then release the brake don't ride it! At least that is what I would do and NOT be frustrated as some have posted. It's not a specific mph, it's a feel for that slipping clutch engaging and disengaging as you move forward!
I don't agree! If in bumper-to-bumper traffic (something for the last 35 years I very seldom have to do when at home) and expect it to operate like a "slushbox" you'll be upset as some have posted!
My suggestion is what I did with my standard shifts in that situation (I have only had standard shifts for DD's in 60 years until the C8, many times in areas where there was that foolish traffic!) You don't move to stay on the car it fronts bumper at a creep. Wait a car length or two then move (except when in NYC where some AH will try to move in so you leave a maximum of 3/4 of a car!
) BUT don't just apply moderate brake pressure as you would in a car with a torque converter and "creep" the car forward! Yep the C8 DCT is slipping the 1st gear clutch slightly and it's not the smooth (inefficient) power transmission of a "Slushbox!" So leave a car length or so then release the brake don't ride it! At least that is what I would do and NOT be frustrated as some have posted. It's not a specific mph, it's a feel for that slipping clutch engaging and disengaging as you move forward!
Last edited by JerryU; Nov 8, 2020 at 04:51 PM.
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E-Ray, 3LZ, ZER, LIFT
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From: NE South Carolina
Funny, I'm participating in a Covid Test Program for SC (I don't have any issues.) Was in line this morning waiting to be tested. I waited until the car in front was ~1 1/2 car lengths ahead, then took it out of Park, engaged Drive then back to Park when I was close to the bumper of the car in front! Was not going to modulate the brake pressure and have that "poor clutch" slipping!
Last edited by JerryU; Nov 9, 2020 at 12:44 PM.
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If your foot is off the brake, the clutch will slip just above idle while creeping. If you are stationary with the brake on or below idle, the clutch is dis engaged otherwise it is not. No DCT is comfortable in very slow traffic, hence the very low gearing in the C8. Keeping clutches engaged partially, like any clutch system, will cause premature wear. Think manual clutch and drive a DCT accordingly. That's why there is a clutch temp gauge for this abuse. Slush box clutches don't slip, the torque converter is the clutch. Drive it as though it was a manual xmission. If you don't have the brake on, pull both paddles to prevent slipping. So creep with the gas pedal, and immediately pull the levers to coast or hit the brake. Left foot on the brake is easier.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
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From: NE South Carolina
^^^
Yep, drive like I did in bumper to bumper traffic with every DD I had for 60 years that all had a 3rd pedal (before my C8.) Let the car in front get 1 1/2 to 2 cars ahead then move forward and wait for another 1 to 2 car gap. That works except in NYC or Miami etc where can't leave more than 3/4 of a car length if there are cars in a lane next to you! Someone will surely cut in to gain one car length!
Glad I've lived in Eastern SC for 35 years where we don't have that silly traffic. Lots of farm fields and back roads for my 20 mile trip to town!
Yep, drive like I did in bumper to bumper traffic with every DD I had for 60 years that all had a 3rd pedal (before my C8.) Let the car in front get 1 1/2 to 2 cars ahead then move forward and wait for another 1 to 2 car gap. That works except in NYC or Miami etc where can't leave more than 3/4 of a car length if there are cars in a lane next to you! Someone will surely cut in to gain one car length!
Glad I've lived in Eastern SC for 35 years where we don't have that silly traffic. Lots of farm fields and back roads for my 20 mile trip to town!
Last edited by JerryU; Nov 9, 2020 at 02:11 PM.
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