GM Service Manual Online
For 1990-2009 cars only

125 TORQUE CONVERTER BUSHING DESIGN CHANGE

IN MID-SEPTEMBER, 1980, DESIGN CHANGES ON THE THM 125 DRIVE SPROCKET SUPPORT MADE IT NECESSARY TO INSTALL THE CONVERTER BUSHING 2MM (5/64") DEEPER INSIDE OF THE HUB (FIGURE 2B). FOR IDENTIFICATION, THE FIRST DESIGN SUPPORT HAS AN UNDERCUT SHAFT (FIGURE 1A) AND THE SECOND SUPPORT HAS A RADIUS SHAFT (FIGURE 1B). SERVICE INFORMATION: 1.THE SECOND DESIGN TORQUE CONVERTER IS INTERCHANGEABLE WITH THE FIRST DESIGN AND SECOND DESIGN DRIVE SPROCKET SUPPORT. (FIGURES 2B, 1A, & 2A) 2.FOR THE FIRST DESIGN TORQUE CONVERTER, THE BUSHING MUST BE PRESSED 2MM (5/64") BELOW THE TOP OF THE CONVERTER HUB TO ALLOW INTERCHANGEABILITY WITH THE SECOND DESIGN DRIVE SPROCKET SUPPORT (FIGURES 1B & 2A). USE J-28537-1 OR A SOCKET WITH A 38.1MM (1 1/2") OUTER DIAMETER TO PRESS THE BUSHING TO THE DEPTH SHOWN IN FIGURE 2B. NOTICE: THE TORQUE CONVERTER BUSHING SHOULD NOT CONTACT THE "Z" RACE OF THE NEEDLE BEARING ASSEMBLY, AS EXCESSIVE WEAR WILL RESULT. REPLACE THE ENTIRE TORQUE CONVERTER IF AN INTERFERENCE PROBLEM OCCURS.

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