I'm going to keep the Pro 15 motor in it but whatever Parts can I upgrade I've already up ready to radio system and receiver battery I'm think I'm going to upgrade bulkhead because mine front one have been cut
These trucks have very large tires and they are heavy. They do not turn the wheels when the truck is sitting on the ground holding its own weight. The truck has to be driving. But this "weird noise" could be stripped gears which means you need a new servo. I would get a very strong metal gear servo for the steering on these trucks. Plastic gears do not last.
I 2nd Tony I had jumbo tires on my 2.5 original Tmax had to upgrade every thing . I made bank on that 4x4 sold it to someone in Argentina and bought a 3.3 Tmax . There very good trucks be sure your steering linkage and spindales are free turning. Which radio did you go with