The John Deere PowerShift transmission was an eight-speed semi-automatic transmission without a torque converter, used in John Deere tractors, including the John Deere Model 4020.TractorData.com John Deere 4020 tractor transmission information The Powershift is not to be confused with similar John Deere transmissions (including the Quad-Range and the PowrQuadTransmissions, PowrQuad™ 19-mph and 25-mph), or with the Ford Ultra Command Powershift or the Allis-Chalmers Power Director. Ford 8830
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