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.
References
- TractorData.com John Deere 4020 tractor transmission information
- Transmissions, PowrQuad™ 19-mph and 25-mph
- Ford 8830
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