My Jeep Liberty 2009 is jumping gears while driving. I want to check transmission fluid but my book states I have a close transmission. Is their access to transmission fluid without opening transmission?

Very scary, while driving or turning, while excelerating, it makes a noise and stops driving and then kicks into gear!

Long crank and clicks when I start it. Sometimes clicks then starts up and other times I have to crank a second time and it starts right up but has a little shake but then stops. Is this a starter problem?

please advise

3.7 engine

Absolutely no heat going to the driver side floor but all of the other vents work fine. They're almost too hot.