upton 180
![]()  | Standard-tread tractor  | Standard-tread tractor  | 
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Standard-tread tractor  | ||
Standard-tread tractor  | 
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Transmission  | |
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Gears  | 21 forward and 9 reverse  | 
The Upton 180 used military-surplus gear boxes. The first gearbox offered four-forward and one-reverse speed. The second gearbox offered five-forward and one-reverse gear. This arrangement offered 21 forward and nine reverse gear combinations. The original rear gearbox was a Spicer from the LVT-4 landing craft. Later, Mack gearboxes from the M3 tank were used.  | |
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