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Dealer putting a new converter in on mine. Gave me no BS on anything. Just straight to putting a new one in.

I started having shuddering while I'm on "manual mode" at 2nd gear/5000 RPM. It sound like I'm driving on a scrubbed road. Noise/vibration is coming from the engine bay/passenger side. Only happens at 2nd gear.
Did anybody have a similar situation? Should I be worried?
Thanks

Had a couple weeks of no issues. Started acting up again. Seems like its hanging 3rd gear when coming to a stop then when accelerating it slips. Dont want to take to dealer until The problem gets undeniable or the trans blows up.

I have another appointment with Service tomorrow. Hoping for the best, have the technician drive with me.

Did a flush on my about 500 miles ago and problem is gone. So for now it seems to be fixed. I honesty didn't think it would work by just changing the oil.

I had this same issue on my 2017. Didn't show up till 10,000 miles. Mostly noticed the rumble while going a steady 70-73. It would come for a few seconds and then go away. On my 12 mile interstate drive it would happen maybe a dozen times. I did notice some slipping during acceleration but wasn't sure. They did the three flush and I'm suppose to bring it back after 200 miles. I was also skeptical about the flushing but it's way better. I notice it shifts much different now as well. They were able to see converter lockup issues while driving/scanning the car.

Hi everyone, been lurking on here ever since I purchased my Jet Black 2017 1SS (built August 2016) this past Saturday. Wondering if the problem I'm having falls under this service bulletin. Whenever I slow down to a stop (around 20-25 mph to 0), and especially when I coast to a stop, I feel the transmission searching for the right gear, and I even feel it shift down sometimes and give the car a little "kick" in the back almost as if I had let go of the brake pedal a bit. Other times I'm coasting to a stop and I feel it all of a sudden hold back as if it has shifted up to a higher gear. Is this torque converter slipage? I only have 170 miles on the car so far but thinking I should take it in right away while any damage is still minimal. Any thoughts would be appreciated!

I had similar issues last May with my '16 SS, took it in and they reprogrammed the TCM and ECM, night and day difference, been fine since then.

What was the last auto you drove? The current crop of 8 speed autos (GM and ZF units) lock up the TC at low speeds. This results in "abrupt" shifts from 1-2 and 2-1 at low throttle inputs (since this is the speed the TC locks/unlocks at). It's more noticeable after cold starts, but is always there.

This might not be your exact issue and I would check into the TCM reset as suggested to be sure. But if that doesn't fix it, then likely you are just noticing this "intended" operation quirk. Also the TC slippage is pretty easy to identify. It feels like driving over highway rumble strips and occurs under light acceleration at cruising speeds (typically 65-75mph).

Thanks for the info everyone. My past car was a 2000 Camry (talk about an upgrade!), so not exactly the most up-to-date transmission, and I also drive my 3 speed auto 1979 Corvette in the summer (4k rpm at 75 mph, gota love it), although I have had a few drives in a 2010 Lexus GS350 and don't remember feeling anything similar (but it's also by no means a sports car...). I also thought that maybe it's just how the new autos operate, and it's good to hear that part of this may be just regular operation, but at the same time the behavior is a little too odd with not just abrupt shifts (which wouldn't bother me, I have a shift kit on the corvette) but seemingly odd shifts up and down. I think I'll take it into the dealer and see if I can convince them to do the TCM/ECM update and flush.

My cars transmission i guess died yesterday.....

From a dead stop to trying to move, it will not grab a gear. The car shakes violently goes up to 4000-6000 and finally grabs gear. this happens from 1st all the way to 3rd.... its really bad.. Even going in reverse its shaking violently. I'll keep you guys updated on what the hell happend!

I took my 2ss to the dealer with shuddering problem. They first did the flush and ended up replacing TC. I drove for about 300 or so miles and it is now experiencing the same problem!

I have the same issue. My dealer told me, I will get a complete new transmission.