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(888) 312-8812 Login SignupFor Spicer TTC 9 and 10 speed transmissions, the TTC Spicer Transmission PSO Shift Knob Assembly Kit provides driver interface control over gear selection and range changes. The shift knob houses internal switching components that communicate pneumatic or electrical signals to the transmission system during gear transitions. Designed to replace part numbers 39Q38-3 and 39Q383, it restores proper shift command functionality at the operator level. Positioned at the top of the shift lever, it serves as the direct control point for range and splitter engagement in compatible manual transmissions. In multi-speed applications requiring accurate range selection input, the TTC Spicer 313766X supports consistent driver command response.
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