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 — Continued d. 3 (3rd Gear) Use when: 1 Operating on hard surfaced roads until sufficient vehicle speed (12 to 15 mph) permits shifting to 4 (4th gear) range. 2 Pulling heavy loads for sustained periods and for ascending or descending on long grades. (Maximum speed is 24 mph.) e. 4 (4th Gear) Use when: Normal driving conditions are on firm, smooth, level ground. (Maximum speed is 35 mph.) 2-105