crt.5 rear drive shaft problem

[RUSTED]

well fixing the driveshaft problem made another problem to occur , the gears inside my center diff were broken to pieces , decided to returned everything back to stock right now (stock chassis tires ....) and use the only small motor i have the mamba max esc and the 7700 kv motor with 2s lipo , for now



my lhs sells a 3500 kv motor i think its the same size as the mamba max motor , will it be ok geared 18/46 with rcm chassis,2s lipo , and 2.2 tires ???