Dodge D150 1990 Service Manual page 909

21 - 58 AUTOMATIC TRANSMISSION •
DIAGNOSIS GUIDE—
FLUID LEAKS
VISUALLY INSPECT FOR SOURCE OF
LEAK. IF THE SOURCE OF LEAK
CANNOT BE READILY DETERMINED,
CLEAN THE EXTERIOR OF THE
TRANSMISSION. CHECK TRANSMISSION
FLUIO LEVEL CORRECT IF NECESSARY.
THE FOLLOWING LEAKS MAY BE CORRECTED
WITHOUT REMOVING THE TRANSMISSION:
AAANUAL LEVER SHAFT OIL SEAL
FILLER TUBE 'O
7
RING
PRESSURE GAUGE PLUG
NEUTRAL START SWITCH
PAN GASKET
OIL COOLER FITTINGS
EXTENSION HOUSING TO CASE GASKET
EXTENSION HOUSING TO CASE BOLTS
EXTENSION HOUSING YOKE SEAL
SPEEDOMETER ADAPTER 'O RING
FRONT BAND ADJUSTING SCREW
THE FOLLOWING LEAKS
REQUIRE REMOVAL OF THE TRANSMISSION
AND TORQUE CONVERTER FOR
CORRECTION.
TRANSMISSION FLUID LEAKING FROM THE LOWER
EDGE OF THE CONVERTER HOUSING; CAUSED BY
FRONT PIJMP SEAL, PUMP TO CASE SEAL, OR TORQUE
CONVERTER WELD.
CRACKED OR
POROUS TRANSMISSION CASE.
THE FOLLOWING LEAKS MAY BE CORRECTED
WITHOUT REMOVING THE TRANSMISSION:
AAANUAL LEVER SHAFT OIL SEAL
FILLER TUBE 'O
7
RING
PRESSURE GAUGE PLUG
NEUTRAL START SWITCH
PAN GASKET
OIL COOLER FITTINGS
EXTENSION HOUSING TO CASE GASKET
EXTENSION HOUSING TO CASE BOLTS
EXTENSION HOUSING YOKE SEAL
SPEEDOMETER ADAPTER 'O RING
FRONT BAND ADJUSTING SCREW
PU568
DIAGNOSIS GUIDE-ABNORMAL NOISE
1
INSPECT AND CORRECT THE TRANSMISSION
FLUID LEVEL, ROAD TEST TO VERIFY THAT
AN ABNORMAL NOISE EXISTS, IDENTIFY
THE TYPE OF NOISE, DRIVING RANGES, AND
CONDITIONS WHEN THE NOISE OCCURS.
GEAR NOISE
OR GRINDING
WHINE OR
BUZZ NOISE
KNOCK, CLICK OR
SCRAPE NOISE
REMOVE THE
TRANSMISSION AND
CONVERTER ASSEMBLY;
DISASSEMBLE, CLEAN AND
INSPECT ALL PARTS; CLEAN
THE VALVE BODY INSTALL
ALL NEW SEALS, RINGS,
AND GASKETS; REPLACE
WORN OR
DEFECTIVE PARTS.
TRANSMISSION HAS
BUZZ OR
WHINE
T
N O DEBRIS PRESENT
REMOVE VALVE BODY,
DISASSEMBLE, CLEAN AND
INSPECT PARTS.
REASSEMBLE, INSTALL,
CHECK OPERATION AND
PRESSURES.
LISTEN TO TRANSMISSION
AND
CONVERTER FOR SOURCE
OF NOISE.
REMOVE TORQUE
CONVERTER AND INSPECT
FOR LOOSE OR CRACKED
CONVERTER DRIVE PLATE;
INSPECT FOR CONTACT OF
THE STARTER DRIVE WITH
THE STARTING RING GEAR.
REMOVE THE
TRANSMISSION PAN;
INSPECT FOR DEBRIS
INDICATING WORN OR
FAILED PARTS.
REPLACE TORQUE
CONVERTER
1
CONVERTER HAS LOUD
BUZZ OR WHINE.
DEBRIS PRESENT
REMOVE TRANSMISSION
AND CONVERTER AS AN
ASSEMBLY; DISASSEMBLE,
CLEAN AND INSPECT ALL
PARTS. CLEAN THE VALVE
BODY INSTALL ALL NEW
SEALS, RINGS AND
GASKETS; REPLACE WORN
OR DEFECTIVE PARTS.
PU566"