Quote:
Originally Posted by SkySerpent
*Update*
Did the test drive. I could feel the vibration in the passengers seat. Every time he was in V4 mode and accelerating it vibrated. He confirmed the vibration existed (which is an improvement from a month ago when they said it didn't exist). However he stated it was "normal" vibration from the transmission and every other Camaro he drove exhibited the same behavior.
I asked about the oscilloscope test and he responded with GM wont pay them to test it and the car doesn't warrant a test as this vibration is "normal".
My symptoms:
-Vibration 90% of the time when from V4 to V6 mode and lightly accelerating from speeds 40km/h to 130km/h (more common 80-130km/h)
-Some vibrations are accompanied by the tachometer fluctuating approx 100-200rpm up and down.
-Severe vibrations are accompanied with a loss of acceleration for a few seconds. I can put the pedal halfway down and get no acceleration, only vibration. These are rare (5 times in 2 months).
-ALL vibrations occur while in a single gear. Most common 7th and 8th. uncommon 4th, 5th, and 6th.
I'm not stupid enough to think these are "normal" but I also am not a transmission expert.
I've been to 2 dealerships and both said nothing is wrong and vibration is "normal".
If I contact Chevrolet Canada can they do anything?
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My 2017 did this. It had the exact symptoms you described- especially the Tach fluctuating up and down. It felt like the transmission was slipping. Andit was in 7th and 8th gear also. It did it all the time, whether cold or warm. Mine also shuddered terribly after the fluid got warm- the rumble strip effect. It went into the dealer, received the transmission flush and it did not help at all. The second time I had such a hard time making an appointment as the SM stated that there was a huge line of cars in front of me with the same transmission issue. I had to keep calling just to get it in again. Driving it like that was very frustrating. Finally brought it in, it sat 2 weeks, then they diagnosed it needing a new torque converter. It sat there another month, finally got a new converter installed. I was so frustrated with the transmission, I immediately traded in the car. When I saw the Service Advisor to pick up the car she profusely apologized and stated that there are so many problems with that 8 speed automatic.
I feel your pain, I been through it. All I car say is the car is so great and I only know now how good it is as I have pretty much the same car, except with the 6M.