When I put in the model number on the tamiya website that what it came back with. It is the front mounted motor with belt driven 4 wheel drive. It still pretty much original other then a different motor installed from about 10 years ago. I really want to get rid of the heat sink and Old school brushed motor with speed control and drop in a brushless motor and ESC. so my real question is that if I were to order parts for the ta03 will it fit or are there certain key things that I should look for when ordering parts for this model. I would hate to order parts that wont fit or are wrong. Im just getting back into rc after a very long hiatus