TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download
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TM 9-2350-311-10 2–10 OPERATING PROCEDURES — CONTINUED 2-10.3 Transmission Shift Control Lever NOTE The transmission is equipped with a shift inhibitor which will restrict movement of the transmission shift control lever and prevent downshifting of the transmission until vehicle speed drops within the correct operating limits of the desired gear range. Brake vehicle to prevent vehicle speed from over-running engine speed while downshifting. a. N (Neutral) Use when: Never descend an incline with transmission in neutral. 1 Stopped or parked. 2 Starting engine or shutting down engine. 3 Idling. 2-103