I just replaced my air filter on my revo 3.3 after my spur gear rubbed a hole in the air filter. I believe i have the spur gear on right (writing facing away from tranny). The pinion gear meshes fine with the spur gear, but the engine is so close to the tranny the air filter actually pushes on the spur gear. The pinion gear sticks out past the spur gear (if that makes any sense. the pinion is closer to the tranny than the spur gear.) I just replaced the rear bulkhead, so did I move the engine mount? If so, how do I move it back? Thanks in advance.