SIX SPEED TRANSMISSION mm 6 7 4 423 GASKET TRANSMISSION COUNTERSHAFT BEARING CAP 17 1370D 136 1 8885987 FS6106A REAR BRG COVER 20696 4 426 SPACER TRANSMISSION COUNTERSHAFT GEAR 17 160OD B6 2 8885958 FS6106A 20718 4 428 COUNTERSHAFT TRANSMISSION 17 132OD B6 1 8885957 FS6106A 20668 4 429 PIN ROLL TRANSMISSION COUNTERSHAFT 17 1485D Q6 1 455160 FS6106A FRONT BRG RETAINER ROLL 62511 4 430 GEAR TRANSMISSION REVERSE IDLER 17 1670D 136 1 8885981 ES6106A 20671 4 431 BEARING TRANSMISSION REVERSE IDLER GEAR 17 168OD 35 2 8885997 FS6106A NEEDLE 20707 4 431 PLUG TRANSMISSION REVERSE IDLER GEAR 17 172OD 35 1 2472641 ES6106A 3 16 DIA 14635 4 433 SHAFT TRANSMISSION REVERSE IDLER GEAR 17 175OD B5 1 8885963 FS6106A INCLS PLUG A 5071 4 435 O RING TRANSMISSION REVERSE IDLER GEAR SHAFT 17 1735DL 35 1 8885983 FS6106A 20674 4 437 WASHER THRUST TRANSMISSION REVERSE IDLER GEAR 17 177OD 86 2 8885982 FS6106A 20673 4 439 GASKET TRANSMISSION CASE APERTURE COVER 17 04OOD 6 1 686902 FS6106A LARGE PTO 8 HOLE 16929 86 1 6273214 FS6106A SMALL PTO 6 HOLE 4 439 BOLT TRANSMISSION CASE APERTURE COVER 17 0345D 86 6 9439905 FS6106A SMALL PTO OPENING 3 8 16 X 3 4 REPL 15512661 8 8885868 FS6106A LARGE PTO OPENING 7 16 14 X 7 8 X 8 725 4 439 COVER TRANSMISSION CASE APERTURE 17 039OD 1 686901 FS6106A LARGE PTO 8 HOLE 16596 86 1 2464252 FS6106A SMALL PTO 6 HOLE 14575 1987 GENERAL MOTORS SERVICE PARTS OPERATIONS M SB 4 423 4 439 4 50 N S reference only Added this issue MAY BE AS REQUIRED PART REV 9 87