GM TURBO HYDRA MATIC 400 TRANSMISSION FRONT AND REAR SERVOS AND OIL CONTROL VALVE BODY Key Description Part No Qty Group Key Description Part No Qty Group 1 Pin Rear Servo Piston 24 Gasket Case to Spacer Plate 4 8623563 1 4 265 1 Ring 4 253 OL 1 4 8624139 1 4 1241 2 Rings 4 309 OL 8624140 1 4 1241 25 Plate Valve Body Spacer See Data 1 4 265 3 Rings 4 365 OL 8624141 1 4 1241 26 Gasket Valve Body to Spacer Plate 1 8623561 1 4 265 2 Retainer Rear Servo Piston Spring 1 1 8623664 1 4 1247 27 Body Oil Control Valve 1 See Data 1 4 265 3 Spring Rear Servo 8623666 1 4 1246 4 Washer Rear Servo Piston 8623744 1 4 1241 28 Pipe Governor to Valve Body 1 8623157 2 4 248 5 Ring Rear Servo Accumulator 29 Bolt Solenoid to Valve Body 20x 1 2 8 900 Piston Oil Seal lnner 8623671 1 4 242 30 Solenoid Shift Valve Body 1 8623788 1 4 265 6 Piston Rear Servo Accumulator 8623669 1 4 241 31 Gasket Solenoid Valve 1 8623741 1 4 265 7 Ring Rear Servo Accumulator Pision Oii Se i Ouiei AA A 8623672 i AAZZ42 32 Seal Strainer to Case Oil 1363951 I 4 197 2 8 Seal new servo Piston Oil 1 1 8623430 1 4 242 33 1r 1n r Aw 011 1967 First 1685 have 4 Stamped Bosses With Pipe 5579822 1 4 197 Er 9 Spring Rear Servo Accumulator Piston 11 8624256 1 4 246 1967 After Jobs have 2 Stamped Bosses l ess Pipe 1 1 6437741 1 4 197 10 Pi n R6 r rv 8624138 1 4 241 1968 69 1 1 111 1 11 1 1 6437741 1 4 197 11 Ring R r Servo Pi n R in r p 274574 1 8 934 34 o k r rmnsmassaon Oil rem 1 1 11 zmszae 1 4 196 12 Gasket Rear Servo Cover 11 1 1 8623174 1 4 241 35 pcm Transmission Oii 1967 First Jobs have 3 Dimples in 13 Cover Rear Servo 1 8624136 1 4 241 Bottom of pcm iiii A iiiii iiiiii 8623778 I 4 195 14 sprang rmni servo Piston 1 11 11 1 11 8623489 1 4 233 1967 After Jobs 1 v 2 Dimples in Bottom of Pan 1 1 8625766 1 4 195 15 Retainer Front Servo Spring 8623704 1 4233 1968 69 1 1 8625766 1 4 195 16 Pin Front Servo Piston 8623651 1 4 228 36 Pipe Assy OH Fiiier im kem i967 After 17 Washer Front Servo Piston 111 8623362 1 4 228 J bs Wlllj Sl r l1 V1 9 2 slumped Bosses F1rst Job is part of Strainer 18 Piston Front Servo 8623649 1 4 228 Assy Key 33 11 1 11 8625428 I 4 197 r 1968 69 1 1 8625428 1 4 197 19 Ring Front Servo Piston Oil Seal 8623131 1 4 229 37 Screw Case to Centre Support Locating 8623498 1 4 162 20 Ring Front Servo Retainer Snap 9412978 1 8 934 38 Valve Control Manual 1 8623592 1 4 265 21 Piston Front Servo Accumulator 8623652 1 4 228 39 Bolt 4 18x 1 1 1 180075 13 8 900 22 Ring Front Servo Accumulotor Piston With Lcckwasher 6 138538 13 8 932 Oil Seal 1 8623653 1 4 229 40 Screen Governor 1 1 8624471 1 4 248 23 Spring Front Servo Accumulator Piston 1 8623654 1 4 233 1967 8623654 1 4 233 1968 1 8623676 1 4 233 1969 396 325 or 375 HP Eng 8623654 1 4 233 1969 396 350 HP Eng 1 8623676 1 4 233