C8 auto-shift
Thread Starter
Heel & Toe
Joined: Sep 2020
Posts: 15
Likes: 8
From: Virginia Beach, Virginia
C8 auto-shift
I just took possession of a new 2020 C8 Z51 three weeks ago. Four times now after starting the car and driving out of my subdivision in automatic, the transmission stayed in first gear and never shifted into second, revving up to 5500 RPMs before I put it in manual. There is less than 200 miles on it and I am accelerating slowly but it failed on four occasions to up shift to second gear while in automatic mode. Has anyone else experienced this issue or have any insight into it?
Thread Starter
Heel & Toe
Joined: Sep 2020
Posts: 15
Likes: 8
From: Virginia Beach, Virginia
Thread Starter
Heel & Toe
Joined: Sep 2020
Posts: 15
Likes: 8
From: Virginia Beach, Virginia
Absolutely certain. My son has a C7 and he took my car out to go around the block and came back complaining that this happened. I thought he was nuts until it happened to me three times
Le Mans Master
Joined: Sep 2012
Posts: 7,146
Likes: 1,940
From: Hagerstown MD
St. Jude Donor '15-'16,'18
If true, having to "clean" solenoids after only a short time and few miles sounds concerning, isn't it?
Last edited by rmorin1249; Sep 23, 2020 at 05:54 PM.
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Thread Starter
Heel & Toe
Joined: Sep 2020
Posts: 15
Likes: 8
From: Virginia Beach, Virginia
Burning Brakes
Joined: Feb 2018
Posts: 927
Likes: 383
If you're flooring it, then yes, it will shift close to redline, and at moderate throttle, shift points will vary by mode.
If this is gentle throttle in Tour mode, and it's going to 5500, then a trip to the dealer is called for.
Your's is the first case I've read of this behavior. That being said, there are all kinds of glitches caused by long periods of storage and transit before delivery. Sometimes a "reset" will fix things. (disconnect battery negative for a few minutes and reconnect). Also make sure battery is fully charged. I'd still let the dealer try first.
Last edited by Bikerjulio; Sep 23, 2020 at 06:30 PM.
Thread Starter
Heel & Toe
Joined: Sep 2020
Posts: 15
Likes: 8
From: Virginia Beach, Virginia
I was babying it not being heavy footed at all and it was in tour mode. I thought my son had jumped on it but he assured me he was keeping it under 4000 RPMs like I asked him to. Each of the three times that happen to me, I was accelerating very slowly in tour mode and the engine was not fully warmed up yet. I contacted my sales person who basically gave me a ‘beats me’ attitude. I then called the service department and asked to speak to a tech. I have not heard back from them yet
Race Director
Joined: Aug 2019
Posts: 12,351
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From: Central Illinois
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,950
Likes: 12,362
From: NE South Carolina
^^^
A car length is still not quick enough IF in Manual Mode (where I have been driving) and making a turn from a stop light! Problem is when in 1st and turning, your hand is NOT in position on the steering wheel to pull the upshift paddle! Gets to 5000 rpm at the blink of an eye.
Compared to what I thought was a lot of torque multiplication in 1st in my my M7 Grand Sport (~10:1 combined gear and dif) the C8 Z51 is 14:1 combined ratio! Have not found a way to have it start in 2nd. Have to move forward, pull the upshift level then turn.
A car length is still not quick enough IF in Manual Mode (where I have been driving) and making a turn from a stop light! Problem is when in 1st and turning, your hand is NOT in position on the steering wheel to pull the upshift paddle! Gets to 5000 rpm at the blink of an eye.
Compared to what I thought was a lot of torque multiplication in 1st in my my M7 Grand Sport (~10:1 combined gear and dif) the C8 Z51 is 14:1 combined ratio! Have not found a way to have it start in 2nd. Have to move forward, pull the upshift level then turn.
Last edited by JerryU; Sep 24, 2020 at 08:46 AM.