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Hello I can answer your question,
You will need to have the transmission computer scanned to check for codes however your symptoms point to the transmission case cover needing to be replaced. Removal and dissassembly of the transmission will be necessary to repair this problem.
Sorry to be the bearer of bad news. Let me know if I can be of further help.
Yes the transmission is a CVT or Continuosly Variable Transmission which is built with a belt that rides on cones to take the place of fixed ratio gears that a common automatic transmission has.
It will have to come out for repair