REBUILT POWERMATIC TRANSMISSION EXCHANGE Powermatic Transmissions rebuilt at the factory to 1961 model design are available to Dealers on an exchange basis When used on 1956 through 1957 truck models it is necessary to replace the linkage and other installation parts to accommodate this latest transmission design The usage chart below specifies the linkage required with each rebuilt transmission for complete replacement installations Dealers should place orders by listing the part number of the re built transmission plus the applicable linkage and installation units needed for the truck model in which the trans mission is being replaced NOTE When Powermatic Transmission replacements are made on 1958 59 truck models linkage does not have to be replaced unless worn or damaged but installation of the Oil Filter Unit should be made L Rebuilt transmissions include a 5 tooth speedometer drive gear It will be neces sary to select the mating driven gear in accordance with the tire size used on the customer s vehicle Refer to Group 4 337 for gear data POWERMATIC TRANSMISSION USAGE CHART TRANS THIROTTLE REBUILT VALVE ACC SHIFTER FLOOR PAN OIL MODEL TRANSMISSION CONTROL LINKAGE COVER FILTER APPLICATION ASSEMBLY LINKAGE UNIT UNIT UNIT UNIT GROUP 4 003 GROUP 4 004 GROUP 4 004 GROUP I6 547 GROUP 4 I98 56 59 Ser 6 261 exc SBC 6772964 3772131 3772133 A 3774421 3774356 56 Ser 6 8 265 exc spinner gov 6772964 C 3749454 3772133 A 3774421 3774356 I 56 Ser 5 7 265 exc a spinner gov 6772964 C 3749450 3772133 D 3774420 3774356 57 59 Ser 6 SBC 261 6772964 37721 31 3772133 A 3774421 3774356 57 59 Ser 10 SBC 322 6772964 3749456 3772133 B 3774421 3774356 57 59 Ser 6 8 SBC 283 6772964 C 3749454 3772133 A 3774421 3774356 56 59 Ser 5 7 w spinner gov F 6772964 C 37494 50 3772133 D 3774420 3774356 56 59 Ser 6 8 w spinner gov 8 cyl exc SBC F 6772964 C 37494 54 3772133 A 3774421 3774356 56 57 Ser 9 322 E F 6772964 3749456 3772133 3774420 3774356 56 57 Ser 10 322 exc SBC E F 6772964 37494 56 3772133 3774421 3774356 58 59 Ser 9 348 6772964 37721 32 3772133 3774420 3774356 58 59 Ser 10 348 6772964 37721 32 3772133 3774421 3774356 60 61 ALL 6772964 3774356 62 ALL 6772964 3774356 63 ALL 348 exc TDM 63 TDM w aux trans 348 6774272 3774356 A NOTE When used on 6 8000 Model discard parts 3745994 Panel and 3745005 Panel and replace with parts 3727747 Panel and 3741587 Pedal Listed in H D Truck Catalog B NOTE When used on 10800 Model discard parts 3730684 Seal 3730685 Retainer 3745994 Panel and 3745005 Pedal and replace with parts 3730686 Seal 3730687 Retainer 3727746 Panel and 3741587 Pedal Listed in H D Truck Catalog C NOTE When used on 1956 or 1957 trucks built before March 1 1957 with 2 Barrel Carburetor on 265 and 283 cu in Engines Throttle Lever and Bearing part 791 1315 is also required When used on 1957 trucks built before March II 1957 with 4 Barrel Carburetor on 283 cu in Engines Throttle Lever and Bearing part 7012420 is also required D NOTE When used on 5000 Model discard parts 3730662 Seal 3730663 Retainer and 3736528 Panel and replace with parts 3736526 Seal 3736525 Retainer and 3736527 Panel Listed in H D Truck Catalog f E NOTE Inspect 1956 model 322 cu in Engine Flywheel and if equipped with a solid type replace with spoke type K flywheel part 1174854 F NOTE When using on 1956 57 models it will be necessary to replace manual selector outer lever w 6756940 It will also be necessary to replace control tower cover w 3753746 1963 Chwrolot Motor blvlslon General Motors Corporation 423 HDT