Mile 4 on go carting I’m hearing a metal rubbing noise from the rear. I put it up on jack stands and rotated the wheels. DS turns freely, PS side feel something rubbing. Pulled the wheels and no sign of rubbing. Bypassed clutch safety switch and fired it up in 4th gear. Hearing a lot of noise coming from center section. Unless someone has a suggestion it looks like I’m pulling the center and half of my suspension. Great timing also. Shoulder surgery 5 days and body ready at paint shop in 3 weeks. Should I talk to FFR first?