Lippert Components 379160 Gear/Linkage (Gear/Linkage with A (for 22,23,28A,30,32,33,34,35,36,38,40 Series) (1101425) For step series 22, 23, 28A, 30, 32, 33, 34, 35, 36, 38 and 40. This gear box has a curved linkage assembly Note: this is kwikee part Number 1101425 Gear box linkage for "a"