I have had a rough start too, check my upgrading talion postings. Have completely done away with Arrma motor an ESC and things started working much better. Still wearing spur gear pretty well on 6s though.Ok now I am feeling really discouraged!! So I have tried using a shroud which did keep it clean, lowered the punch setting, made sure I got the gear on tight and double checked the mesh setting. Now not only did I strip another gear but the motor shaft has now broken off??? REALLY!!! I can't be the only one having all these issues on 6s. In total I have run this truck 7 times and have broken 4 pinions and now a motor shaft. Really starting to think I leave it on 4S and only drive it to church on Sundays...