This car has been amazing aside from the spur gear and the front ball cup shock caps. I had a 44.2 that I put much more time on an never stripped a spur gear so it did shock me when I blew this one. The 44.2 did have faults of its own with arms and rear diff gear but I am religious about mesh for proper temps binding and overall smoothness. I look forward to a replacement to see if its a tolerance issue.