thump in the transmission when starting
I have a 2014 Grand Cherokee Limited with 7K miles. At around 5k miles, I noticed a hard downshifting from 3,2,1. Also, occasionally when I start the car, there is a hard thump and the car would move. It felt like the transmission was engaging. I brought it in for service and a TSB was found for the hard downshifting but they said they did not notice the hard thump during start. The hard downshifting has pretty much been taken care of though it does happen if I have to stop abruptly. The hard thump at starting the car is still happening and after another trip to the service department they still do not see an issue.
Has anyone felt this or is experiencing the same issue? The service guy said it may be normal??? To me a hard bang on the transmission when the car starts can not be normal nor can it be good for the transmission.
Any help or advice would be appreciated.