After replacing a busted motor mount on the kid's power wheels, I was on a forum and came across another power wheels mod... traction bands.
Its quick and easy, and now the jeep is virtually unstoppable. Up and down the hills and across the mud. No more getting stuck.
https://www.youtube.com/watch?v=AAySJVt6bys
http://youtu.be/AAySJVt6bys