*TM 1-1500-204-23-5Change 3 3-4.11g. Engine Transmission. The two engine transmis-sions are identical assemblies. Minor rearrangement oftransmission external parts provides interchangeabilitybetween right-- and left--hand engine transmission instal-lations. The transmissions are mounted directly on theengine being driven by the engine output shaft. Thetransmissions provide angle of drive and RPM reductionin torque. Torque from the engine is transmitted by theengine transmission and engine drive shaft assembly tothe engine--combining transmission. Freewheeling isprovided in the output shaft of the engine transmissions.This permits the drive system to overrun the engine dur-ing failure, a sudden reduction of RPM, or autorotation.(See Figure 3-3.J).Figure3-3.J. Sectional View of Engine Transmission.
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