Originally Posted by x2o

Okay so my car actually does this too, no idea what really causes it. My mechanic also says it is fine and it doesn't seem to be causing any harm. I just attributed it to a quirk in my gtm upgraded transmission or tune.

It happens most of the time in third gear, but if I switch to 4th gear before it happens in third, 4th will engage at a lower than expected rpm cause it drops during the switch. If that makes any sense, lol. Maybe I can grab a video of mine too.

I really only drive my 7at in M-mode so I've gotten familiar with this little problem. It only happens under light acceleration/city driving before my oil/trans is up to temp. When I'm really going for it the shifts are perfect.