th125c_service_变速箱维修手册

AUTOMATIC TRANSAXLE/TRANSMISSION 7A-1SECTION 7AAUTOMATIC TRANSAXLE/TRANSMISSIONDIAGNOSIS AND GENERAL SERVICEThe service procedures in this section are common to allautomatic transaxles and automatic transmissions.For on-carservice and overhaul procedures,refer to the specific sections.For vehicles sold in Canada and equipped with non-closedloop engines,also refer to the appropriate Canadian servicemanual supplement.CONTENTSDiagnosis7A-1Checking AutomaticPreliminary Checking Procedure7A-1Transaxle/Transmission Fluid Level.........7A-7Road Test Procedure7A-2Fluid Level Checking Procedure7A-7Fluid Pressure Test Procedure7A-2Changing Fluid and Filter..............7A-7Causes of Low Oil Pressure7A-2T.V.Cable…7A-8Causes of High Oil Pressure7A-3Adjustment Procedure7A-8Fluid Leak Diagnosis7A-3Engine Coolant in Transmission7A-8Finding the Leak7A-3Oil Cooler and Cooler Line Flushing .........7A-8Powder Method.7A-3Torque Converter Clutch (TCC)7A-9Black Light and Dye Method................7A-3Torque Converter Vibration TestRepairing the Leak…7A-3Procedure…7A-9Gaskets44447A-3Converter Flushing Procedure ...............7A-9Seals7A-4Torque Converter Evaluation1tt+45…7A-10Possible Points of Oil Leak ..................7A-4Clutch Plate Diagnosis..7A-11Torque Converter Clutch Diagnosis7A-4Composition Plates…7A-11TCC Diagnosis,+t644+1n+4544t07A-4Steel Plates…7A-11Functional Check Procedure7A-4Causes of Burned Clutch Plates7A-11Preliminary Check Procedure7A-4Case Porosity Repair Procedure ...........7A-11T.V.Cable System Diagnosis*AA1141444*7A-5G0Vern0ri…7A-11Speedometer System Diagnosis ..........7A-5Governor Driven Gear .........7A-12Noise and Vibration Diagnosis7A-5Drive Link Assembly (Chain)....................7A-12DIAGNOSISnspectAutomatic transaxle/transmission malfunctionsWarm up engine and transmission to operatingare caused by one,or a combination,of the following:temperature.2Improper fluid levelFluid level.Refer to "Fluid Level CheckingProcedure"Low engine performance3Engine idle speedT.V.cable misadjustmentImportant●Manual linkage misadjustmentDo not attempt to proceed with the●Internal fluid leaksPreliminary Checking Procedure if theElectrical failureengine does not perform properly.Correctany engine malfunction first.Mechanical failure4.T.V.cable for freedom of movement andPRELIMINARY CHECKING PROCEDUREreturnability at cable activating lever.Check to besure that the T.V.cable is adjusted to the properFigure 1length.The T.V.cable may function properly with theMost of the automatic transaxle/transmissionengine shut off and cold but may malfunctionproblems are caused by improper external adjustments.when hot.Check both cold and at operatingBefore attempting to service a transmission ortemperature.transaxle,the fluid level and external adjustmentsShift control linkage.Make sure the linkage doesshould be checked and corrected as necessary.not bind and is properly adjusted.