John Deere Powershift transmission

The John Deere PowerShift transmission was an eight-speed semi-automatic transmission without a torque converter, used in John Deere tractors, including the iconic John Deere Model 4020. The Powershift is not to be confused with similar John Deere transmissions (including the Quad-Range and the PowrQuad), or with the Ford Ultra Command Powershift or the Allis Chalmers Power Director. The PowerShift was dropped in favor of the PowrQuad during the 1980s and reintroduced in the 90s as a 16-speed model built by Funk, a company that was eventually purchased by John Deere. The 5-speed version was also used in the Ford 8630 series tractors as a 36-speed Funk Ultra Command.