Roger Bennett

I recently bought a 2021 Coleman ut 400 although it is a 2021 I bought it new. From the start it would pop out of reverse. After driving it for about a half an hour, I backed up and it popped out of reverse. I researched the forums and tried to adjust the shift cable. No matter what I do there is no reverse. There was no noise or slamming in and out of gear. It just stopped pulling. Has anyone experienced a similar problem and how do I fix it. Any information would be appreciated.