Hi I picked up a 77 pantera. Having problems with the drive belt. I thought it was a secondary clutch issue. If I put the sled on a stand it's fine. When I put it on the ground and hit the throttle the sheaves open up and sucks the belt to the bottom of the secondary and the primary smokes the belt and it just binds. I got another secondary and it does the same thing. Any help would be great.! Thanks so much. - Dave
