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Just bought my 2022 Stingray with 8900 miles on it. The original owner had not had the transmission filter changed, so that was the first thing I did before it even hit 9k miles (dealer honored the warranty even though it was late). However, a couple days later a problem came up. In My Mode which is Tour mode with the exhaust sound maxed out, the car has a repeatable clunk when creeping forward at stop signs or stop lights at 1-2 mph to a stop. It won't do it on hard brakes just nice easy stops and starts. So...only in 1st gear, only when you are stopped...and creep forward at 1-2 mps to stop again gradually.
The one thing I was worried about when buying this car was the transmission issues, and even though I still have warranty coverage...I'm kind of freaking out a bit, I've got a call to the corvette mechanic at my local dealer. My first sports car...my first vette, so I'm a little green at what's normal and what's not in a performance car. Anyone else having this issue...is it normal.
Just bought my 2022 Stingray with 8900 miles on it. The original owner had not had the transmission filter changed, so that was the first thing I did before it even hit 9k miles (dealer honored the warranty even though it was late). However, a couple days later a problem came up. In My Mode which is Tour mode with the exhaust sound maxed out, the car has a repeatable clunk when creeping forward at stop signs or stop lights at 1-2 mph to a stop. It won't do it on hard brakes just nice easy stops and starts. So...only in 1st gear, only when you are stopped...and creep forward at 1-2 mps to stop again gradually.
The one thing I was worried about when buying this car was the transmission issues, and even though I still have warranty coverage...I'm kind of freaking out a bit, I've got a call to the corvette mechanic at my local dealer. My first sports car...my first vette, so I'm a little green at what's normal and what's not in a performance car. Anyone else having this issue...is it normal.
That's the plan, guess I was just hoping someone had a similar experience and could tell me what's likely...software update, add more fluid, beginning of the problem leading to a new transmission...
That's the plan, guess I was just hoping someone had a similar experience and could tell me what's likely...software update, add more fluid, beginning of the problem leading to a new transmission...
I don't sit well with unknowns...lol
I had a similar experience at the three year mark (7800 miles) when I had the filter and fluid both changed. The dealer also performed a software update which caused rough shifting and the creep you described. It cleared up on its own after just a day or two of normal driving. The transmission seemed to relearn and smooth out again. No problems since. 2021 Coupe, non Z51.
This is exactly what I needed to hear, I'll be taking it in anyway...but this makes my day! Thank you.
Keep in mind the DCT is not a slush box. It is two 4-speed manual transmissions paired together more or less, with the computer controlling the clutches instead of you with a 3rd pedal. Any time the software is adjusted, the "adaptive" shift logic has to more or less re-adapt.
You can drive with power train set to "tour" (or really any setting to be honest) but in manual mode and learn the sweet spots for upshifts/downshifts with the paddles for smooth transitions. You can even pull both paddles as you coast to a stop to disengage both clutches, allowing for smooth stops. Then when starting off from a standstill, keep it in Manual mode and try starting in 2nd gear rather than 1st. You'll notice a far smoother rollout. The 1-2 shift can be jarring just like in a manual if the driver isnt super familiar with the clutch's release point on any given car.
Yep folks who are used to a fluid coupling torque converter and try to drive that way can get confused!
In 1st gear up to about 4 mph the 1st gear clutch has to slip. If it didn't just like driving a standard shift the engine would stall! I had a jerky motion for the 1st ~1000 miles crawling into my garage watching the driver door mirror tip to garage door wood molding. It got much better after the high spots wore in.
BUT having only driven standard shift cars as a DD from my 1st in 1959 I don't creep forward unless required. If in stop and go traffic as I do as I did with my standard shift cars, let the car in front get a few car lengths ahead and as it brakes I move up and keep a firm foot on the brake pedal. When your foot is off the brake, or worse with light pressure the pressure engaging the clutch increases.
Now clucking sounds are something else. But describing sounds in words is difficult. The dealer will know if it's normal (their classic response) or not!
PS: As far as clucking sounds, have been on the form well before the C8 and followed most DCT issues. A clucking sound is not one I have heard. Looking at how the DCT works with all gears in constant mesh hard to see where it can Clunk. That could be one of the constant velocity joints on the drive shafts. There have been some issues, not many, with the large ***** in the constant velocity joints. But have not seen posted in a while.
Perhaps these Pics might help.
One way to visualize a torque converter is if two fans are facing one another. The fluid (be it air or liquid) is inefficient BUT very smooth. A standard shift clutch (the DCT has 2) must slip below ~4 mph in 1st gear. Takes most folks a while to manage slipping a standard shift car clutch controlling left foot pressure on the clutch and right foot on the gas peddle. The C8 computer does a good job BUT it will never feel like a slushbox!
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C8 Transmission Issue
