ORIGINAL: floydei
Its an HSP Monster 1:10 Nitro.
If u want a movie or pics ill fix em tomorrow
I think its 2 years old but ive drived it about 3 times and ive had this problem before
i believe thats a simillar model to the redcat volcano.
when the motor spins, does the clutch bell(pinion gear) move?
next, does the spur gear move?
if those move, then the problem could be in the diffs.
or it could be that the center driveshafts cups are slipping. check the grub screws the the drive cups by the center diff and the front/rear diffs.