GEAR BOX PTO (111.9 STEP-UP) Hotsy Pacific Sale! from $345.00 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. 1 to 1.9 speed multiplier 1-3/8? splined shaft (same shaft as standard tractor PTO) 540 RPM PTO speed multiplied to 1026 RPM at pump shaft For pumps with a 24mm shaft