ALLISON AUTOMATIC TRANSMISSION POWERMATIC P I AND AT540 4 197 FILTER ASSY PIPE ASSY Oil Pan Pump Suction 71 72 Ser 50 w T H 475 6259423 1 oil pump 71 72 Ser 50 w T H 475 8626886 1 PIPE ASSY oil filter inlet 4 198 FILTER UNIT ELEMENT UNIT Transmission Oil External NOTE 1 To be used when a rebuilt powermatic is installed in the field 71 72 All w P T 3774356 1 Note 1 71 72 All w P T 5578261 1 ELEMENT UNIT oil filter type PF 133 1 4 203 BOLT Oil Supply Pump l 71 72 All w A T 540 9423545 8 oil pump body to pumover it 18 x 1 71 72 All w A T 540 9418304 7 flared hex hd 18 x 1 4 4 205 MODULATOR ASSY PIPE ASSY RETAINER SEAL VALVE WASHER Vacuum 71 72 Ser 50 w T H 475 3027222 1 vacuum 71 72 All 3937972 1 PIPE ASSY vac modulator 62 O L 71 72 All w A T 540 71 72 Ser 50 w T H 475 A 8627650 1 RETAINER modulator 71 72 All w A T 540 6264903 1 SEAL O RING modulator to trans case l D x 71 72 Ser 50 w T H 475 8623983 1 VAL 3 E vacuuri modulator 4 71 72 All w A T 540 WASHER modulator pipe clip 72 Ser 40 50 w T H 475 6 cyl 2479541 1 trans control switch bracket 4 216 VALVE Transmission Control I POWERMATIC 71 72 All 5574472 1 oil transfer plate 4 216A PLUG Transmission Control A T 540 71 72 All 8623292 1 PLUG press regulator valve bore 4 216B VALVE ASSY PLUG SPACER UNIT SPRING Transmission Main Valve TURBO HYDRAMATIC T H 475 i A 71 72 Ser 50 w T H 475 8623422 1 w plug pressure reg 71 72 Ser 50 w T H 475 8623292 1 PLUG pressure reg valve bore i 0 D 71 72 Ser 50 w T H 475 8623368 A R SPACER UNIT pressure reg spring 2 per unit 71 72 Ser 50 w T H 475 8623090 1 SPRING trans frt oil pump pressure reg valve 4 224 BODY ASSY COVER ASSY Transmission Oil 71 72 All w A T 540 T H 475 8625954 1 front oil pump Q 71 72 Ser 50 w T H 475 8625955 1 COVER ASSY front oil pump 4 226 SEAL BEARING ASSY BUSHINIG GASKET PIN Transmission l Front Servo 71 72 All w A T 540 T H 475 3884683 9 front oil pump to trans case bolt 71 72 All w A T 540 T H 475 6261413 1 0 ring 8 u l D 71 72 All w A T 540 T H 475 8626916 1 SEAL ASSY front oil pump 71 72 All w A T 540 148415 1 BEARING ASSY pump cover roller 71 72 Ser 50 w T H 475 8623940 1 BUSHING oil pump body 71 72 Ser 50 w T H 475 8623978 1 GASKET frt oil pump to case 71 72 All w A T 540 T H 475 8623078 1 PIN pump cover dia x 1 O L 4 228 PISTON RING ROD Low Servo 71 72 Ser 50 w T H 475 8626878 1 frt servo 71 72 Ser 50 w T H 475 8626883 1 frt accum 71 72 Ser 50 w T H 475 8626884 1 RING frt servo spring ret 71 72 Ser 50 w T H 475 8626879 1 ROD frt servo piston I 4 229 RING Transmission Front Servo Piston 71 72 Ser 50 w T H 475 8623131 1 trans front servo piston oil kg 4 233 SPRING RETAINER Transmission Front Servo I 71 72 Ser 50 w T H 475 8623489 1 frt servo piston 71 72 Ser 50 w T H 475 8626775 1 frt accumulator piston 71 72 Ser 50 w T H 475 8626881 1 RETAINER frt servo spring i GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TM REV 5 79 4 151 4 197 4 233