TM-9-2320-280-10 HMMWV Operator Manual Download
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TM 9-2320-280-10 Table 1-7. Transmission Data (3L80) General Information Model ..................................................................................................................... Turbo Hydra-Matic 3L80 Type ........................................................................................................................... Three-speed automatic Oil type ......................................................................................................................................... Dexron® II Transmission Range Selection Recommended Shift Lever Position Operating Condition "R" (reverse) Clear of traffic and obstructions, using ground guide. 'N" (neutral) Vehicle stopped with parking brake applied. "D" (drive) Normal driving and fording. "2" (second) Hill climbing and “engine braking" to slow vehicle when descending steep hills. "1" (first) Maximum "engine braking" when descending very steep hills, climbing steep hills, or driving through deep mud, sand, or snow. Table 1-8. Transmission Data (4L80-E) General Information Model ............................................................................................................... Turbo Hydra-Matic 4L80-E Type ........................................................................................................................... Four-speed automatic Oil type ........................................................................................................................................ Dexron III Transmission Range Selection Recommended Shift Lever Position Operating Condition "P" (park) Vehicle stopped with parking brake applied. "R" (reverse) Clear of traffic and obstructions, using ground guide. "N" (neutral) Vehicle stopped with parking brake applied. " D " (overdrive) Normal driving and fording. “D”(drive) Hilly terrain and towing a trailer. "2" (second) Hill climbing and “engine braking" to slow vehicle when descending steep hills. "1" (first) Maximum "engine braking" when descending very steep hills, climbing steep hills, or driving through deep mud, sand, or snow. 1-26