Greetings, Forum! Happy 4th! I'm giving instruction to my daughter in our Super Cub, 150HP. Several landings on pavement recently. On last flight, we experienced some heavy tail wheel shimmy on one of the landings (made a few more after with no such shimmy). While taxiing in, we realized we could not steer the tailwheel to the right with the right rudder pedal. It worked fine on taxi out, and rudder pedal worked fine in flight for yaw movements. On taxi in, we moved right rudder all the way and only got a very small movement to the right. Winds were calm and no hard landings during the flight. I did recently service (grease) the tail wheel assembly. Any thoughts on what/how to trouble shoot? Thank you.