[arpad_m]

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?

You are not mistaken, this is the shudder, see links above to threads discussing it, and find attached the TSB to show the dealer.

I understand this is pretty frustrating, however, the new 2019 fluid and (if that isn't enough) a new torque converter fixed the issue for many, in fact I don't recall any verified reports of the shudder returning after that.