I have a 2014 Veloster Turbo with a manual transmission with about 34K miles on it. From the very beginning I noticed that the clutch had a strange issue. It works fine 95 of the time, but every once in a while, when the clutch is depressed, it goes down to the floor without any resistance, but you can still change gears. When you put it into gear and release the clutch, the pedal does not follow your foot out. It waits for a second and then kind of pops, and then comes back out. This only happens when going from 3rd to 4th. It happens at low and high RPMs. Now the weird things is that it always happens in the same spot in the road. So I always know when it is going to happen.
Once, and only once, the pedal stuck to the floor at a stop sign and I could not shift at all. Had to pull up the pedal with my hand and then it worked correctly.
Took it to a dealer and they said they got it to duplicate the issue (after 2 weeks of having it). They replaced the Master cylinder and said it was fixed. The clutch did the same thing as before in the same spot in the road on the way home from the dealer.
I have now taken it to another dealer. They had it for 1 week and said they couldn't duplicate the issue. I drove the tech to the spot where it happens and repeatedly had the issue and the tech had the issue while he drove it as well.
The dealer said they had no idea how to fix it, so they brought in a Hyundai engineer in from Dallas to look at it. They decided to replace the slave cylinder in the transmission. So, after having the car for 3 1/2 weeks, they said it was fixed.
I drove it home that evening and it did the same thing at the same spot. Circled around, and it repeatedly happened. I drove it the next day to make sure, and I noticed that there is a whine coming from the transmission at speed now ( very noticeable at 50-80 MPH) that was not there before. I verified it was not tire noise and the noise follows the tach.
I took it back to the same dealer that evening, which was last Friday. They again said they have no idea how to fix the clutch issue and they don't know what the new noise is, so they said they brought in a Hyundai engineer from California to look at it. They called today to said they think replacing all the hoses running to the master and slave cylinders will fix it, but they aren't sure. They also have not identified what is causing the new noise and it has been there for a week so far.
So does anyone have any ideas what would be causing the clutch to do that in the same spot in the road every time. Since I know when it will happen, if I delay shifting for when I normally would, it doesn't happen. I would appreciate any ideas all of you have.