2017 Sentra transmission advice
 

So my fiance has a 2017 Nissan sentra SV. over the summer, the trans started acting up. You'll be driving along, cruise set, flat road, all of a sudden the rpms will jump up about 2000 rpms and sometimes float around sporadically without changing speed or throttle input. If you try to give it more gas while its doing this, it just revs up further and feels like its slipping. it will usually resolve itself in the next minute or two. this happens pretty often and the car sees 120 miles of interstate per day. it started off only doing it when the car was over 80 mph but now its anything over 75 mph so it is progressing. It currently has 83000 miles on it and is almost out of the extended 84k transmission warranty. the dealer has reprogrammed it, they say it isnt throwing any codes and the fluid looks good so they wont fix it. I have a Foxwell scanner that I hook up periodically and I also don't see any codes. My question is this......... Is this something that means ill likely need a transmission in a few thousand miles or could it possibly limp on like this for another 50k?

I am also curious about answers to this.

Hello Have you cleaned your throttle body ? Do not use brake cleaner , use the right stuff to clean it and it will needs to be removed , its sort of easy. Make sure the electronics dont get wet, the ones inside the black plastic cover.
you can manipulate the butterfly valve or plate inside but with caution to be able to clean it, good luck.

No, it can fail and leave you stranded. Quoted $4600 to replace mine.