Yeah the truck is built pretty tough, and the transmission seemed beefy, which is why I'm surprised.

Bringing back an old thread. Seem like this one just won't die. I have several of these trucks. One is currently running an HV-Maxx 4400 and has worked out pretty well for a couple of years with no major problems. I have a bunch of parts spare parts and steel gears are now available so I'm not concerned about hurting it. I know technology has changed and I'm ready to go brushless on a thunder king. I'm going to run twin 2S 8000's for 14.8V. What would be a good motor and ESC for this truck. I don't know the gear ratio but I can tell you the truck is heavy at just under 11 lbs. Not looking to be super fast. Mid 30's will be fine.

Here's a question to answer your question- is the baja king basically the same as the thunderking? If so, then a quick search will yield a few threads with BL conversions and other nice updates to the vehcile using parts of other more modern vehicles.

http://www.rc-monster.com/forum/show...t=thunder+king
http://www.rc-monster.com/forum/show...t=thunder+king
http://www.rc-monster.com/forum/show...t=thunder+king
http://www.rc-monster.com/forum/show...t=thunder+king