My family had an old Chevy Blazer that we need to place behind our garage. Due to the position of our trees, we can only push it if we want to use another vehicle. This morning, my dad used our Jeep Wrangler, with a 5-speed manual, to push it and after a good push I could see smoke coming from below our Jeep. It was only temporary and it kind of smelled like burnt rubber except stronger. I was wondering if it was our clutch slipping or something else? I'm assuming that Jeeps weren't made for this kind of work so it's kind of dumb for me and my dad to be doing this. Any help would be appreciated, thanks.

*My family has...*