Driving along in my Graduate (with the top down) when my accelerator pedal became useless. Discovered that one of the plastic throttle link ends ( of which there are 4) for the pedal linkage had broken. I was able to order the parts from Centerline International and the new ones are metal .Wonderful! However they fit on to the ball end (covering the ball) as opposed to going over and allowing the ball to go through it completely. What an easy repair, I thought. Everything worked fine until my first trip when they just popped off , and continued popping off, approximately 10 times within 5 miles of driving. Any suggestions?