2 PACK - John Deere Original Equipment Tractor Hydraulic Fluid Friction Modifier - TY27807. 12oz bottle. PEMO Tractor Hydraulic Fluid Friction Modifier A special additive for use in selected systems to modify tractor hydraulic oil to meet the frictional requirements of specific machines. This additive will reduce excessive brake noise. Formulated to be added to John Deere Hy-Gard® and should not be used in any other applications without specific instructions. See service bulletins and DTAC solutions for further information. This is a OEM John Deere additive. Thanks for looking!