[coolhandcountry]

The gearing being low would make motor run hot and esc cooler. You seem to have th truck geared about right. 6s lipos is about 18.5 nimh cells to voltage. Was the other two ESCs bk 9920. The 36120 is a nice controller but has a 42000 rpm limit. You should be under that. Do you have any drag in the rc? Make the esc draw more than should.