AUTOMATIC TRANSMISSIONS MICHIGAN MECHANIC
STUDY GUIDE
TRANSMISSION TROUBLESHOOTING
WHAT'S THE FIRST STEP TO DIAGNOSE AN IMPROPERLY SHIFTING TRANSMISSION? IT'S ESSENTIAL TO
VERIFY PROPER ENGINE OPERATING CONDITIONS.
WHAT COULD CAUSE A CAR TO UPSHIFT LATE AND HARSHLY? A COMMON ISSUE IS EXCESSIVE
PRESSURE REGULATOR ADJUSTMENT.
WHEN PERFORMING A ROUTINE MAINTENANCE SERVICE, WHAT SHOULD YOU DO IF YOU NOTICE DARK
RED TRANSMISSION FLUID AND A LEAKING REAR SEAL? CHANGE THE FLUID AND FILTER, AND
RECOMMEND REPLACING THE REAR SEAL AND BUSHING.
WHAT COULD CAUSE A TRANSMISSION TO SLIP IN REVERSE AND NOT HAVE ENGINE BRAKING IN
MANUAL LOW GEAR? A POTENTIAL ISSUE IS A DEFECTIVE REAR BAND.
HOW DO YOU ADJUST SHIFT POINTS TO ACCOMMODATE THE DRIVER'S POWER DEMANDS? VACUUM
OR MECHANICAL LINKAGE CAN HELP ADJUST SHIFT POINTS.
WHEN TWO MEMBERS OF A PLANETARY GEAR SET ARE LOCKED TOGETHER, WHAT HAPPENS TO THE
OUTPUT SHAFT? IT TURNS AT THE SAME SPEED AS THE INPUT SHAFT.
WHAT'S THE RESULT IF DIRECT AND FORWARD CLUTCH PACKS IN A COMMON 3-SPEED AUTOMATIC
TRANSMISSION ARE APPLIED AT THE SAME TIME? THE TRANSMISSION WILL LIKELY JAMMED OR LOCKED
UP, WITH NO DRIVE OR REVERSE.
WHICH OF THE FOLLOWING IS LIKELY TO CAUSE BURNED CLUTCH PLATE BANDS? INTERNAL LEAKS DUE
TO DAMAGED SEALS.
, WHAT DOES AUTOMATIC TRANSMISSION FLUID THAT RESEMBLES CHOCOLATE MILKSHAKE INDICATE? A
LEAKING RADIATOR COOLER, WHICH CAN MIX WITH THE TRANSMISSION FLUID.
WHAT IS A TRANAXLE ASSEMBLY? IT'S A TRANSMISSION AND DIFFERENTIAL ASSEMBLY IN ONE
COMMON CASE.
WHEN CHECKING A SPOOL VALVE FROM THE VALVE BODY, WHAT SHOULD YOU DO IF IT HAS VERY
SQUARE AND SHARP EDGES ON ITS LANDS? NOTHING; THIS IS A DESIRABLE CONDITION.
WHAT IS HIGH ENGINE IDLE SPEED LIKELY TO CAUSE? LOW LINE PRESSURE AND EARLY UPSHIFTS.
WHAT SHOULD YOU DO NEXT AFTER REMOVING THE TRANSMISSION FROM A CAR AND THE TORQUE
CONVERTER? MEASURE AND RECORD INPUT SHAFT ENDPLAY.
WHAT IS CORRECT WHEN CHECKING THE FLUID LEVEL IN A TRANSMISSION? THE LEVEL WILL BE LOW
WHEN COLD AND RISE WHEN HOT.
WHAT CAN INCORRECT ADJUSTMENT OF THE LINKAGE BETWEEN THE SHIFT LEVER AND MANUAL VALVE
CAUSE? SLIPPAGE OF CLUTCHES AND BANDS, DELAYED CLUTCH APPLICATION, AND EARLY
TRANSMISSION FAILURE.
WHY WON'T A VEHICLE DOWNSHIFT INTO PASSING GEAR? A LIKELY CAUSE IS A WORN 2-3 SHIFT RAIL
OR THROTTLE CABLE OR LINKAGE OUT OF ADJUSTMENT.
WHAT IS AVERAGE LINE PRESSURE IN DRIVE AT IDLE TYPICALLY AROUND? 80-95 PSI.
AS ENGINE VACUUM DROPS, WHAT HAPPENS TO MODULATOR PRESSURE? IT INCREASES.
A WORN GOVENOR BORE CAN CAUSE : ✔️A. INCREASED LINE PRESSURE
B. HIGH MODULATOR PRESSURE
C. SLIPPING WHEN STARTING OFF IN LOW GEAR (NOT CORRECT AWNSER)
STUDY GUIDE
TRANSMISSION TROUBLESHOOTING
WHAT'S THE FIRST STEP TO DIAGNOSE AN IMPROPERLY SHIFTING TRANSMISSION? IT'S ESSENTIAL TO
VERIFY PROPER ENGINE OPERATING CONDITIONS.
WHAT COULD CAUSE A CAR TO UPSHIFT LATE AND HARSHLY? A COMMON ISSUE IS EXCESSIVE
PRESSURE REGULATOR ADJUSTMENT.
WHEN PERFORMING A ROUTINE MAINTENANCE SERVICE, WHAT SHOULD YOU DO IF YOU NOTICE DARK
RED TRANSMISSION FLUID AND A LEAKING REAR SEAL? CHANGE THE FLUID AND FILTER, AND
RECOMMEND REPLACING THE REAR SEAL AND BUSHING.
WHAT COULD CAUSE A TRANSMISSION TO SLIP IN REVERSE AND NOT HAVE ENGINE BRAKING IN
MANUAL LOW GEAR? A POTENTIAL ISSUE IS A DEFECTIVE REAR BAND.
HOW DO YOU ADJUST SHIFT POINTS TO ACCOMMODATE THE DRIVER'S POWER DEMANDS? VACUUM
OR MECHANICAL LINKAGE CAN HELP ADJUST SHIFT POINTS.
WHEN TWO MEMBERS OF A PLANETARY GEAR SET ARE LOCKED TOGETHER, WHAT HAPPENS TO THE
OUTPUT SHAFT? IT TURNS AT THE SAME SPEED AS THE INPUT SHAFT.
WHAT'S THE RESULT IF DIRECT AND FORWARD CLUTCH PACKS IN A COMMON 3-SPEED AUTOMATIC
TRANSMISSION ARE APPLIED AT THE SAME TIME? THE TRANSMISSION WILL LIKELY JAMMED OR LOCKED
UP, WITH NO DRIVE OR REVERSE.
WHICH OF THE FOLLOWING IS LIKELY TO CAUSE BURNED CLUTCH PLATE BANDS? INTERNAL LEAKS DUE
TO DAMAGED SEALS.
, WHAT DOES AUTOMATIC TRANSMISSION FLUID THAT RESEMBLES CHOCOLATE MILKSHAKE INDICATE? A
LEAKING RADIATOR COOLER, WHICH CAN MIX WITH THE TRANSMISSION FLUID.
WHAT IS A TRANAXLE ASSEMBLY? IT'S A TRANSMISSION AND DIFFERENTIAL ASSEMBLY IN ONE
COMMON CASE.
WHEN CHECKING A SPOOL VALVE FROM THE VALVE BODY, WHAT SHOULD YOU DO IF IT HAS VERY
SQUARE AND SHARP EDGES ON ITS LANDS? NOTHING; THIS IS A DESIRABLE CONDITION.
WHAT IS HIGH ENGINE IDLE SPEED LIKELY TO CAUSE? LOW LINE PRESSURE AND EARLY UPSHIFTS.
WHAT SHOULD YOU DO NEXT AFTER REMOVING THE TRANSMISSION FROM A CAR AND THE TORQUE
CONVERTER? MEASURE AND RECORD INPUT SHAFT ENDPLAY.
WHAT IS CORRECT WHEN CHECKING THE FLUID LEVEL IN A TRANSMISSION? THE LEVEL WILL BE LOW
WHEN COLD AND RISE WHEN HOT.
WHAT CAN INCORRECT ADJUSTMENT OF THE LINKAGE BETWEEN THE SHIFT LEVER AND MANUAL VALVE
CAUSE? SLIPPAGE OF CLUTCHES AND BANDS, DELAYED CLUTCH APPLICATION, AND EARLY
TRANSMISSION FAILURE.
WHY WON'T A VEHICLE DOWNSHIFT INTO PASSING GEAR? A LIKELY CAUSE IS A WORN 2-3 SHIFT RAIL
OR THROTTLE CABLE OR LINKAGE OUT OF ADJUSTMENT.
WHAT IS AVERAGE LINE PRESSURE IN DRIVE AT IDLE TYPICALLY AROUND? 80-95 PSI.
AS ENGINE VACUUM DROPS, WHAT HAPPENS TO MODULATOR PRESSURE? IT INCREASES.
A WORN GOVENOR BORE CAN CAUSE : ✔️A. INCREASED LINE PRESSURE
B. HIGH MODULATOR PRESSURE
C. SLIPPING WHEN STARTING OFF IN LOW GEAR (NOT CORRECT AWNSER)
