problems with my mad rat

[billyboy9002]

hi guys sorry to bother you all again, after the meeting today i stayed for a much needed practice,

after 10 mins or so the car just lost power to the wheels, i have had a look in the diff and it seems ok in there, no missing balls or flat bits and the gear has not broken either, built it all back up and seemed fine whilst holding it, then when i put it on the floor lots or motor noise and not much movement

i am stumped

any ideas?

cheers