My ESC is too hot?

Ok, I worked like a dog and reworked my buggy this last week. I put the motor on the left side so I could fit two battery packs into it. Of course my motor mount was fine for the right side but not for the left side. The base was two short and it couldn't reach past the flywheel hole. So I had to make a new motor mount. I've got it all back together now. It now accepts two battery packs.

The last time I had it out, it would sputter like radio interference when it was further than 25 feet from me which was unusual. I've never have had any problems with it before. I figure it was my lame radio so I got a MX-3 FM radio.

I had it out today and I was still having some bad sputter/interfrence problem. After about 10 min. the temps were good, batteries were 125*F, ESC was at 130* and the motor was in the 130* range as well.

It ran for about 10 minutes then it went into a insane full reverse! I only had control of the steering. I managed to hit my truck tire where it dug a hole while I unplugged it. I'm thinking that there is something wrong with ESC. Anybody experienced anything like this?