DIRECT CLUTCH ASSY OIL PUMP DESIGN CHANGE INFORMATION. Buick Electra Estate Wagon 1980

For 1990-2009 cars

# DIRECT CLUTCH ASSY OIL PUMP DESIGN CHANGE INFORMATION

IN MID-AUGUST, 1980, A NEW DESIGN DIRECT CLUTCH ASSEMBLY WENT INTO PRODUCTION FOR ALL THM 200 AND 200C TRANSMISSIONS. THE NEW DESIGN DIRECT CLUTCH HOUSING IS IDENTIFIED BY A LARGER THRUST FACE (SEE FIGURE 1). COMBINED WITH THE ABOVE CHANGE, A NEW DESIGN OIL PUMP COVER IS ALSO IN USE. THE NEW DESIGN OIL PUMP COVER, DEPENDING ON CASTING HEIGHT, MAY OR MAY NOT HAVE A CLEARANCE CUT TO ELIMINATE ANY POSSIBILITY OF THE NEW DESIGN DIRECT CLUTCH RUBBING ON THE OIL PUMP COVER AT AREA SHOWN IN FIGURE 2. IF THE NEW DESIGN DIRECT CLUTCH IS ASSEMBLED WITH THE PAST DESIGN OIL PUMP COVER THERE IS AN EXTREMELY SMALL CHANCE FOR INTERFERANCE BETWEEN THE PARTS. TO CHECK FOR INTERFERENCE DO THE FOLLOWING: 1.INSTALL THE OIL PUMP TO DIRECT CLUTCH THRUST WASHER ON THE OIL PUMP COVER. 2.INSTALL THE DIRECT CLUTCH ASSEMBLY ONTO THE OIL PUMP COVER. 3.SPIN THE DIRECT CLUTCH ASSEMBLY AND CHECK FOR INTERFERENCE BETWEEN THE PARTS AT THE POINT MARKED CLEARANCE CUT IN FIGURE 2. 4.IF AN INTERFERENCE POINT EXISTS, USE A HAND HELD GRINDER TO MAKE A CLEARANCE GRIND AS SHOWN IN FIGURE 2. THE CLEARANCE GRIND SHOULD REMOVE ONLY ENOUGH METAL TO GIVE CLEARANCE BETWEEN THE DIRECT CLUTCH ASSEMBLY AND OIL PUMP COVER. REMOVAL OF TOO MUCH METAL WILL CREATE A HOLE IN THE CONVERTER CLUTCH ACTUATOR BORE OF THE PUMP COVER.

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