Originally Posted by
Fllyer
Had a similar thing happen on my S once. Try placing a washer between the motor screws and the motor plate. It sounds a little like the motor screws might be touching the armature.
Check the pins on the front drive shafts - if the pin is protruding from the axle cup, it can cause a ticking sound. Don't ask me how I know
Also, make sure spur is clean - if something is wedged into the teeth, it may cause a ticking sound as well.