Yale GP GDP 20 25 30 35 50 F2 FE GP50 GDP40 Yanmar 4TNE92 Torque Converter

The Yale torque converter for GP/GDP 20–50 series forklifts is a hydraulic fluid–coupled device that multiplies engine torque to drive the powershift transmission, delivering smooth acceleration and torque transfer in industrial material-handling equipment. Compatible engines include Yanmar 4TNE92 (2.6L diesel) and Mazda F2/FE gasoline, and it fits GP20, GP25, GP30, GP35, GP50, and GDP40 models; it is used between the engine and transmission to enable controlled power delivery during shifts and under load. Constructed with a heavy-duty steel housing and a rotating impeller, turbine, and stator, this unit provides hydraulic torque multiplication with a typical torque ratio of approximately 2.8–3.0:1. Operating pressure ranges from about 0.5–0.7 MPa (72–101 psi), and it is designed for installation in powershift transmission systems within warehouse and industrial environments where reliable torque transfer is critical. Common replacements include Yale 524208558 and 220034308, and Hyster 524208558.