TM 5-3 805-262-34Section Il. POWER TRAIN MAINTENANCEThis section contains the information you need to maintainthe :* Transmission* Front and Rear Axle Differential AssemblyIt gives you instructions on how to repair components thatare within the capabilities of general support maintenance.ParaTransmission Maintenance . . . . . . . . . . 4-3Transmission Torque ConverterGroup . . . l l . . . l . . l l l l . l . . . . . 4-3aTorque Converter Housing . . . . . . . 4-3bTransmission Turbine DrivenGears and Freewheel Unit . . . . 4-3cForward Clutch and PlanetaryGroup . . . . . . . . . . . . . . . . . . . . . . . 4-3dReverse Clutch and PlanetaryGroup . . . . . . . . . . . . . . . . . . . . . . . 4-3eParaHigh Range Clutch and TransferGear . . . . . . . . . . . . . . . . . . . . . . . . 4-3fOutput Shaft . . . . . . . . . . . . . . . . . . . 4-3gTransmission Housing . . . . . . . . . . . 4-3hControl Valve . . . . . . . . . . . . . . . . . . 4-3iCharging Pump . . . . . . l *. . l . . . . . l l 4-3jFront and Rear Axles DifferentialAssembly Maintenance . . . . . . . . . . . 4-4Differential Carrier . . . . . . . . . . . 4-4aDifferential Case and GearAssembly . . . . . . . . . . . . . . . . . . . . 4-4bTRANSMISSION THEORY OF OPERATIONTransmission uses hydraulic oil to lubricate and cool transmission components, applyclutches, and turn torque converter turbines.Main components of transmission are torque converter, free wheel clutch, reverseclutch, low clutch, high clutch, and necessary gears and shafts to send motion tooutput shaft of transmission. Transmission includes items shown.Torque converter has two turbines. Each turbine is connected to remainder of trans-mission by a different gear ratio. First turbine has low gear ratio and gives slowspeed with maximum torque. Second turbine has higher gear ratio and gives fast speedwith minimum torque. As operating conditions change, engine power is automaticallysent by correct turbine and gear ratio to remainder of transmission.Free wheel clutch is connected between driven gear for first turbine and driven gearfor second turbine. Free wheel clutch permits correct turbine to send engine powerto remainder of transmission.Transmission includes two sets of planetary gears. Reverse clutch is connected toreverse planetary gears and low clutch is connected to low planetary gears. When re-verse clutch is applied, power is sent through both sets of planetary gears whichreverses rotation of output shaft. When low clutch is applied, power is sent throughonly low planetary gears; low planetary gears give correct gear ratio for low range.When high clutch is applied, engine power is sent from driven gear for second tur-bine through sun gear in planetaries to transfer gear to give correct gear ratio forhigh range.4-86
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