Had the exact same problem. If you get a 1460 parts book picture of the slip clutch and compare it with the 1480 picture,you will notice they use the exact same parts but put them together in a different order. Take the entire slip clutch jackshaft off and put it back together like a 1460. Next, take the leveling auger off the grain tank and put one more of the short screw auger on so the corn is pulled away from the opening at the top of the elevator better. I hope this helps. It worked for me.