CAMPAIGN: AUTO TRANS REAR INTERNAL GEAR (REPLACE GEAR)

Subject: PRODUCT CAMPAIGN 92C24 - 4L80-E OR 4L80-EHD ELECTRONIC 4-SPEED AUTOMATIC TRANSMISSION REAR INTERNAL GEAR

Model and Year: 1992 C/K TRUCKS, P30 TRUCKS AND G VANS

General Motors has determined that certain 1992 C/K trucks, P30 trucks and G vans equipped with 4L80-E or 4L80-EHD electronic 4-speed automatic transmissions may have a transmission rear internal gear with an improper heat treat process. With extended use this may cause noisy operation, sluggish forward gear operation, no motion in reverse, and/or no motion in drive.

To correct this condition, dealers are to replace the rear internal gear.

VEHICLES INVOLVED

Involved are certain 1992 C/K trucks, P30 trucks and G vans equipped with 4L80-E or 4L80-EHD electronic 4-speed automatic transmissions and built within the following VIN breakpoints:

PLANT YEAR MODEL PLANT CODE FROM THROUGH ----- ------------- --------- ---- --------- --------- 1992 C/K - Pickup Oshawa "1" N1169360 N1232903 1992 C/K - Pickup Pontiac "E" NE120478 NE193625 1992 C/K - Pickup Fort Wayne "Z" NZ166138 NZ197510 1992 C/K - Blazer/ Janesville "J" NJ103310 NJ332337 Suburban/ Crew Cab 1992 P30 Detroit "3" N3306269 N3312818 1992 G-Van Scarborough "4" N4119655 N4147403 1992 G-Van Lordstown "7" N7121335 N7132498

Involved vehicles have been identified by Vehicle Identification Number Computer Listings. Computer listings contain the complete Vehicle Identif- ication Number, owner name and address data, and are furnished to involved dealers with the campaign bulletin. Owner name and address data furnished will enable dealers to follow-up with owners involved in this campaign.

These listings may contain owner names and addresses obtained from State Motor Vehicle Registration Records. The use of such motor vehicle registration data for any other purpose is a violation of law in several states. Accordingly, you are urged to limit the use of this listing to the follow-up necessary to complete this campaign. Any dealer not receiving a computer listing with the campaign bulletin has no involved vehicles currently assigned.

OWNER NOTIFICATION

Owners will be notified of this campaign on their vehicles by Chevrolet Motor Division (see copy of owner letter included with this bulletin).

DEALER CAMPAIGN RESPONSIBILITY

All unsold new vehicles in dealers' possession and subject to this campaign must be held and inspected/repaired per the service procedure of this campaign bulletin before owners take possession of these vehicles.

Dealers are to service all vehicles subject to this campaign at no charge to owners, regardless of mileage, age of vehicle, or ownership, from this time forward.

Owners of vehicles recently sold from your new vehicle inventory are to be contacted by the dealer, and arrangements made to make the required correction according to instructions contained in this bulletin.

In summary, whenever a vehicle subject to this campaign enters your vehicle inventory, or is in your dealership for service in the future, please take the steps necessary to be sure the campaign correction has been made before selling or releasing the vehicle.

PARTS INFORMATION

Parts required to complete this campaign are to be obtained from General Motors Service Parts Operations (GMSPO). To ensure these parts will be obtained as soon as possible, they should be ordered from GMSPO on a "C.I.O." order with no special instruction code, but on an advise code (2).

Quantity/ Part Number Description Vehicle

08687940 Rear Internal Gear Repair Package 1 (For Trans. Models: BMP, BNP, DPP, DRP, LLP, BYP, BZP)

08687939 Rear Internal Gear Repair Package 1 (For Trans. Models: ABP, ACP, AFP, AJP, BAP, BJP, MBP, MKP, MPP, BSP, BUP, MAP, MJP, MLP, MHP, DCP, DLP, DNP, HTP, TWP, TSP, LAP, LFP)

08683922 Greased Output Shaft Sleeve & Seal Assembly 1 (For C Trucks And G Vans With Trans. Models AJP, AFP, MJP, MKP, MLP, MPP, HTP and TSP)

12345881 Dexron II-E Automatic Transmission Fluid 7 Quarts

Order only one rear internal gear repair package per vehicle based on the transmission model type. Transmission model type is identified by the model code on the transmission as illustrated below.

Note that each rear internal gear repair package (PIN 08687940 or 08687939) consists of two layers of parts. The contents of each layer are listed below.

1st Layer: Center Support, Center Support Bolt, Rear Internal Gear, Pump Assembly Bolts, Filter Assembly, Converter Seal Assembly, 4th Clutch Bolt, Small Package With Oil Fill Tube Multi-Lip Seal, Manual Shift Shaft Seal Assembly & Force Motor Feed Filter Assembly.

2nd Layer: (Under Cardboard Insert) Center Support Seal Rings, Pump Gasket, Pump Seal, Rear Servo Cover Gasket, And Valve- Body-To-Case Gasket.

Notice: The previous center support and rear internal gear must be discarded after the normal warranty retention period. Do not reuse these parts.

Also, some parts in kits 08686940 and 08687939 will not be installed as part of the procedures in this bulletin.

SERVICE PROCEDURE

Numbers in parenthesis refer to figures on pages 6 - 12.

Tools Required: J-21366 Converter Holding Strap J-3289-20 Transmission Holding Fixture Base J-8763-02 Transmission Holding Fixture J-38655 Transmission Holding Fixture Adapter J-37789 Pump Removal Tool J-38868 Gear Unit Assembly Installer/ Remover J-23093 Center Support Tool J-24396 Intermediate Clutch Pack Alignment Tool J-38358-A Forward Clutch Assembly Remover & Installer J-23327 Forward Clutch Spring Compressor J-38733 Direct Clutch Assembly Remover/Installer J-38734 Intermediate Clutch Piston Compressor Adapter J-38735 Center Support Seal Installer/ Sizer/Pusher

1. Remove transmission from vehicle and install torque converter holding strap J-21366. When removing transmission, follow procedures in appropriate truck service manual.

NOTICE:

FOR STEPS 2-40, REFER TO THE SECTION OF THE 1992 LIGHT DUTY TRUCK UNIT REPAIR MANUAL REGARDING 4L80-E OR 4L80-EHD ELECTRONIC 4-SPEED AUTOMATIC TRANSMISSIONS FOR DETAILED PROCEDURES AND ILLUSTRATIONS.

ALSO, BE CERTAIN TO INSPECT COMPONENTS FOR CRACKS AND OTHER DAMAGE DURING DISASSEMBLY AND REASSEMBLY OF TRANSMISSION.

2. Drain fluid from transmission and dispose of properly.

3. Remove two speed sensors (22) and bolts (23) with 8mm socket.

4. Mount transmission on bench fixture using J-3289-20 base, J-8763-02 holding fixture, and J-38655 adapter.

5. Remove converter assembly (1) after removing torque converter holding strap J-21366.

Notice: Torque converter is extremely heavy (approx. 65 lbs.), personal injury may result.

6. Remove turbine shaft 0-ring (2).

7. For C Trucks or G Vans equipped with transmission models AJP, AFP, MJP, MKP, MLP, MPP, HTP, & TSP remove six 15mm case extension bolts (21), extension assembly (19), extension-to-case seal (15), sleeve output shaft yoke seal (682) and seal output shaft (683).

8. Remove 10mm pan assembly bolts (27), remove pan (28 or 85 depending on model) and seal assembly (29).

Notice: Seal assembly (29) will be reused.

9. Remove filter assembly (31) and filter neck seal assembly (32).

10. Disconnect wire harness assembly (34) at pass through connector in the case.

Notice: Use precautions to protect electrical pins from damage.

To prevent electrical connector distress, do not pry off connectors from electrical components.

11. Remove harness assembly with valve assembly complete.

12. Remove 21 valve body assembly bolts (35), manual detent spring and roller assembly (41), lube pipe (39), short lube pipe bolt (36), retainer (37), clamp (38), three wiring clips (33), indicator stop (43), control valve assembly (including accumulator housing) (44), six pressure switch bolts (76), pressure switch assembly (40) and check balls (54).

Notice: Do not use a magnet to remove check balls. Magnet could cause a check ball to become magnetized causing metal particles to stick to check ball.

13. Remove valve-body-to-case gasket (48).

14. Remove manual valve (319) from control valve assembly to prevent damage to manual valve.

15. Remove front servo assembly (55-60).

16. Remove six 10mm rear servo accumulator cover bolts (61), rear servo accumulator cover (62), rear servo accumulator gasket (63) and rear servo accumulator assembly (64-74).

17. Remove 13mm pump assembly bolts (3), pump assembly (4), pump-to- case seal (5) and pump-cover-to-case gasket (6). Use J-37789 when removing pump assembly.

18. Remove complete overdrive unit (501-522).

19. Remove 4th clutch bolt (26) using 40t torx head socket. Bolt will not be reused.

20. Remove housing assembly (529).

21. Remove forward clutch assembly (602) using J-38358-A.

22. Remove thrust washer (612).

23. Remove direct clutch assembly (623) using J-38733.

24. Remove front band (628).

25. Remove snap ring (629), intermediate clutch backing plate (630) and clutch plates (631 & 632).

26. Remove center support bolt (25). Bolt will not be reused.

27. Remove snap ring center support (633) and gear unit assembly (634-671) using J-38868.

28. Disassemble gear unit and output assembly (634-671).

29. Install new seal rings (639) to new center support (640) using J-38735. Reuse piston (636), seals (637 & 638), spring & retainer assembly (635), and snap ring (634) using J-23327 and J-38734 and install to center support.

30. Install new rear internal gear (666) to main shaft (662) with snap ring (670).

31. Assemble gear unit and output assembly (634-671).

32. Install gear unit and output assembly (634-671) into case using J-38868 and also installing snap ring (633).

33. Align center support (640) using J-23093.

a. Locate J-23093 into center support direct clutch passage through case.

b. Apply pressure on J-23093, seating center support splines counter- clockwise against case splines (push tool toward rear servo bore).

c. Install new center support bolt (25) and torque to 43 Nm (32 lb. ft.). DO NOT OVER TORQUE.

34. Install intermediate clutch plates (632 & 631), backing plate (630) and snap ring (629). Backing plate is to be installed flat side down. Align clutch plates using J-24396.

Notice: Dip all clutch plates in Dexron II-E transmission fluid.

35. Install front band (628) and direct clutch assembly (623) using J-38733.

36. Install thrust washer (612).

37. Install forward clutch assembly (602) into case using J-38358-A.

38. Install 4th clutch assembly (529) into case and install new 4th clutch bolt (26).

39. Disassemble 4th clutch plates (525 & 526), backing plate (524) and snap ring (523) to ease installation of overdrive unit (step 41).

40. Rotate transmission to horizontal position and torque 4th clutch bolt (26) to 15-17 Nm (11-13 lb. ft.). DO NOT OVER TORQUE.

41. Install complete overdrive unit (501-522) into case.

42. Install 4th clutch plate (525 & 526), backing plate (524) and snap ring (523).

Notice: Install steel plates with narrow tang at "one o'clock" position.

43. Install new pump gasket (6), new pump seal (5) and pump assembly (4) to case (7) with new bolts (3). Torque bolts to 24 Nm (18 lb. ft.) with 13mm socket.

44. Install turbine shaft o-ring (2) to turbine shaft (502).

45. Install front servo assembly (55-60).

46. Install rear servo accumulator spring (74), servo parts (64-73), new rear servo accumulator gasket (63), rear servo accumulator cover (62) and 6 10mm rear servo accumulator bolts (61) into case (7). Torque rear servo accumulator bolts to 24 Nm (18 lb. ft.).

47. Install check balls (54) in proper location.

Notice: Do not use a magnet to install check balls. Magnet could cause a check ball to become magnetized and cause metal particles to stick to the ball.

48. Install new valve-body-to-case gasket (48).

49. Install manual valve (319) into valve body assembly.

50. Install valve body assembly/accumulator (44) and wiring harness assembly (34) onto case.

51. Make certain that 5 o-rings are attached to switch assembly.

52. Install spring and roller assembly (41) to valve body.

53. Install fluid indicator stop (43), wiring clips (33) lube pipe clamp (38) and lube pipe (39) to valve body. Long end of lube pipe (39) inserts into case (7) and short end inserts into valve body.

54. Install 21 valve body assembly bolts (35) and torque to 11 Nm (97 lb. in.) using a 10mm socket. Be certain to torque bolts (35) in alphabetical.sequence shown in illustration on page 12.

55. Install pressure switch assembly (40) with 6 pressure switch assembly bolts (76). Torque bolts (76) to 11 Nm (97 lb. in.) using a 8mm socket. Be certain to torque bolts in alphabetical sequence shown in illustration on page 12.

56. Install lube pipe clip (37) to valve body with short bolt (36) and torque to 11 Nm (97 lb. in.) using lomm socket.

57. Install wiring harness (34) to five or six connectors (if removed) depending on transmission model.

58. Install new filter assembly (31), filter neck seal assembly (32), reusable pan seal (29), pan (28 or 85 depending on model), and pan bolts (27). Torque pan bolts to 24 Nm (18 lb. ft.) using 10mm socket.

59. For C Trucks or G Vans with transmission models AJP, AFP, MJP, MKP, MLP, MPP, HTP, or TSP, install new sleeve output shaft yoke seal (682) and new seal output shaft (683) onto output shaft. Also, install extension assembly (19), seal (15) and six bolts (21). Torque bolts to 34 Nm (25 lb. ft.) using 15mm socket.

60. Install two speed sensors, bracket assemblies (22) and two bolts (23). Torque bolts to 11 Nm (97 lb. ft.) using 8mm socket.

61. Install torque converter assembly (1) and install holding strap J-21366.

Notice: Torque converter is extremely heavy (approx. 65 lbs.), personal injury may result.

62. Remove transmission from bench fixture and install into vehicle.

63. Disconnect holding strap J-21366.

64. Install transmission into vehicle.

65. Fill transmission to proper level per cold check procedure.

66. Test drive vehicle to assure proper operation of transmission.

67. Check transmission fluid and fill to proper level when transmission is at proper temperature.

68. Install Campaign Identification Label.

CAMPAIGN IDENTIFICATION LABEL

Each vehicle corrected in accordance with the instructions outlined in this Product Campaign Bulletin will require a "Campaign Identification Label". Each label provides a space to include the campaign number and the five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or a ball point pen.

Each "Campaign Identification Label" is to be located on the radiator core support in an area which will be visible when the vehicle is brought in for periodic servicing by the owner. Additional "Campaign Identification Labels" can be obtained from DAC.

Apply "Campaign Identification Label" only on a clean, dry surface.

CLAIM INFORMATION

Submit a Product Campaign Claim with the information indicated below:

* FAILED PARTS CC-FC LABOR LAB OTH NET REPAIR PERFORMED PC PART NO. ALLOW OP HRS HRS AMT ------------------ --- -------- ----- ----- ------ --- --- --- Install New Rear Internal Gear - C Truck - Sleeve & 1 08687939 ** SK-00 V7490 4.4 0.1 $ Seal Assembly Not Required

Install New Rear Internal Gear - C Truck - Sleeve & 2 08687939 ** SK-00 V7491 4.6 0.1 $ Seal Assembly Required

Install New Rear Internal Gear - 1 08687939 ** SK-00 V7492 4.6 0.1 $ C Truck Heavy Duty

Install New Rear Internal Gear - 1 08687939 ** SK-00 V7493 5.8 0.1 $ K Truck - Without Skid Plate

Install New Rear Internal Gear - 1 08687939 ** SK-00 V7494 6.1 0.1 $ K Truck - With Skid Plate

Install New Rear Internal Gear - G Van - Sleeve & 1 08687939 ** SK-00 V7495 4.1 0.1 $ Seal Assembly Not Required

Install New Rear Internal Gear - G Van - Sleeve & 2 08687939 ** SK-00 V7496 4.3 0.1 $ Seal assembly Required

Install New Rear Internal Gear - 1 08687939 ** SK-00 V7496 4.6 0.1 $ P Truck

Notice: All labor times include 0.3 hrs. for test driving vehicle after campaign repair is performed.

* Campaign Administrative Allowance.

**The "Parts Allowance" should be the sum total of the current GMSPO Dealer Net price plus 30% of all parts required for the repair.

*** The "$" in the shown in the "Net Amount" column represents 7 quarts of transmission fluid used to perform the required campaign repairs.

Dealers will automatically receive the correct labor and material allowance based on the labor operation performed.

Refer to the Chevrolet Claims Processing Manual for details on Product Campaign Claim Submission.

Dear Chevrolet Owner:

This notice is sent to inform you that Chevrolet Motor Division is conducting a recall campaign that includes your vehicle.

REASON FOR THIS RECALL

General Motors has determined that certain 1992 C/K trucks, P30 trucks and G vans equipped with 4L80-E or 4L80-EHD electronic 4-speed automatic transmissions may have a transmission rear internal gear with an improper heat treat process. With extended use this may cause noisy operation, sluggish forward gear operation, no motion in reverse, and/or no motion in drive.

WHAT WE WILL DO

To correct this condition, your dealer will replace the rear internal gear in your vehicle's transmission. This service will be performed for you at no charge.

WHAT YOU SHOULD DO

Please contact your Chevrolet dealer as soon as possible to arrange a service date. Instructions for making this correction have been sent to your dealer and parts are available. The labor time necessary to perform this service correction is approximately 4 to 6 hours depending on the vehicle and transmission involved. Please ask your dealer if you wish to know how much additional time will be needed to schedule and process your vehicle.

The enclosed owner reply card identifies your vehicle. Presentation of this card to your dealer will assist in making the necessary correction in the shortest possible time. If you have sold or traded your vehicle, please let us know by completing the postage paid reply card and returning it to us.

We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your continued satisfaction with our products.

THE FOLLOWING IS THE KEY TO THE FIGURES IN THIS BULLETIN:

REFER TO FIGURE 2:

1 TORQUE CONVERTER ASSEMBLY 2 SEAL, O-RING (TURBINE SHAFT/TURBINE HUB) 3 BOLT & SEAL ASSEMBLY, PUMP TO CASE 4 PUMP ASSEMBLY, COMPLETE 5 SEAL, OIL PUMP TO CASE 6 GASKET, PUMP COVER TO CASE 7 CASE ASSEMBLY, COMPLETE 8 CONNECTOR, INVERTED FLARED TUBE 9 PIPE, VENT 10 SCREW, NAMEPLATE 11 NAMEPLATE 12 CUP, ORIFICE W/SEAL PLUG-REAR LUBE (4WD) 13 SEAL ASSEMBLY, REAR LUBE 14 RING, SNAP SEAL RETAINER 15 SEAL, EXTENSION TO CASE 16 RING, SNAP INTERNAL 17 BEARING ASSEMBLY, BALL 18 SPACER, BEARING 19 EXTENSION ASSEMBLY, CASE 20 HELIXSEAL ASSEMBLY, CASE EXTENSION 21 BOLT, HEX HD (MlO X 1.5 X 30.0) 22 SENSOR ASM, AFTRANS. INPUT SPD. & VEH. SPD. 23 BOLT, METRIC HEX 24 PLUG, OIL TEST HOLE (HEX HD 1/8 PIPE) 25 BOLT, CASE TO CENTER SUPPORT 26 BOLT, CASE (4TH CLUTCH) 27 BOLT, HEX FLANGE HD (PAN TO CASE) 28 PAN, TRANSMISSION OIL 29 SEAL, TRANS. OIL PAN 30 MAGNET, CHIP COLLECTOR 31 FILTER ASSEMBLY, TRANSMISSION OIL 32 SEAL ASSEMBLY, FILTER NECK 33 CLAMP, ELECTRICAL CABLE 34 HARNESS ASSEMBLY, ELECTRICAL WIRING 35 BOLT, HEX HD. (M6 X 1.0 X 55.0) 36 BOLT, M6 X 1.0 X 35.0 LG V/B TO C/P 37 RETAINER, LUBE PIPE 38 CLAMP, LUBE PIPE 39 PIPE, LUBE 40 SWITCH ASM., A/TRANS. FLUID PRESS. 41 SPRING ASSEMBLY, MANUAL DETENT 43 STOP, DIPSTICK (FLUID LEVEL INDICATOR) 44 BODY ASSEMBLY, CONTROL VALVE 45 GASKET, VALVE BODY TO SPACER PLATE 46 PLATE, VALVE BODY SPACER 47 GASKET, ACCUMULATOR HSG. TO SPACER PLATE 48 GASKET, SPACER PLATE TO CASE 49 SPRING, 4TH CLUTCH ACCUM. PISTON 50 SPRING, 3RD CLUTCH ACCUM. PISTON 51 HOUSING, ACCUMULATOR 52 BOLT, ACCUM. HOUSING TO VALVE BODY (LONG) 53 BOLT, ACCUM. HOUSING TO VALVE BODY (SHORT) 54 BALL,.25 DIAMETER 55 PIN, FRONT SERVO PISTON 56 RING, FRONT SERVO SPRING RETAINER 57 RING, OIL SEAL 58 PISTON, FRONT SERVO 59 RETAINER, FRONT SERVO SPRING 60 SPRING, FRONT SERVO PISTON 61 BOLT, REAR SERVO COVER 62 COVER, REAR SERVO 63 GASKET, REAR SERVO COVER 64 CLIP, RETAINING (BOTTOM) 65 PISTON, REAR SERVO 66 RING, OIL SEAL ACCUM. PISTON (OUTER) 67 RING, OIL SEAL ACCUM. PISTON (INNER) 68 PISTON, REAR ACCUMULATOR 69 SEAL, REVERSE SERVO PISTON 70 WASHER, SERVO PISTON 71 SPRING, REAR SERVO 72 RETAINER, REAR PISTON SPRING 73 PIN, REAR BAND APPLY (SELECTIVE) 74 SPRING, REAR ACCUMULATOR 75 SCREEN, PWM SOLENOID 76 BOLT, SPECIAL 77 BUSHING, CASE EXTENSION 78 BUSHING, TRANSMISSION CASE 79 PLUG, DIRECT OIL GAL (.25 DIA. CUP) 80 PIN, ANCHOR FRONT BAND 81 PIN, ANCHOR REAR BAND 82 DRAIN PLUG ASM., OIL PAN 83 WASHER, TYPE A FLAT GASKET 84 NUT, TRANS. OIL PAN DRAIN PLUG 85 PAN ASSEMBLY, TRANS. OIL

REFER TO FIGURE 3:

301 BODY, CONTROL VALVE 302 SCREEN FILTER, PRESSURE CONTROL SOL. FEED 303 PIN, COILED SPRING 304 PLUG,CHECKBALL 305 BALL (.375 DIA.) 306 BUSHING, 3RD/REVERSE CHECKBALL 307 SEAL, O-RING 308 VALVE, 3-4 SHIFT 309 SPRING, SHIFT VALVE RETURN (2-3 & 3-4) 310 BOLT, SOLENOID (1-2 & 2-3 SHIFT, PRESSURE CONTROL SOLENOID) 311 2-3 SHIFT SOLENOID & O-RING ASSEMBLY 312 VALVE, 2-3 SHIFT 313 1-2 SHIFT SOLENOID & O-RING ASSEMBLY 314 VALVE, 1-2 SHIFT 315 SPRING, 1-2 SHIFTVALVE RETURN 316 PLUG, SHIFT SOLENOID FEED FILTER 317 FILTER, SHIFT SOLENOID FEED 318 SLEEVE, LO/REVERSE CHECKBALL 319 VALVE, MANUAL 320 PRESSURE CONTROL SOLENOID 321 CLAMP, PRESSURE CONTROL SOL. RETAINING 322 CLIP, PWM SOLENOID RETAINING 323 SOLENOID ASSEMBLY, PWM 324 VALVE, TCC REGULATOR APPLY 325 SPRING, TCC REGULATOR APPLY VALVE 326 PLUG, VALVE BORE (ACTUATOR FEED) 327 SPRING, ACTUATOR FEED LIMIT VALVE 328 VALVE, ACTUATOR FEED LIMIT 329 PLUG, ACCUMULATOR VALVE BORE 330 SPRING, ACCUMULATOR VALVE 331 VALVE, ACCUMULATOR

REFER TO FIGURE 4:

501 RING, OIL SEAL (TURBINE SHAFT/STATOR HSG.) 502 SHAFT, TURBINE 503 RING, OIL SEAL (TURBINE SHAFT/FORWARD HSG.) 504 HOUSING ASSEMBLY, OVERRUN CLUTCH 505 PISTON ASSEMBLY, OVERRUN CLUTCH 506 SPRING & RETAINER ASSEMBLY 507 RING, SNAP RETAINER 508 PLATE, OVERRUN CLUTCH 509 PLATE ASSEMBLY, OVERRUN CLUTCH 510 PLATE, OVERRUN CLUTCH BACKING 511 RING, SNAP 512 ROLLER CLUTCH ASSEMBLY, OVERDRIVE 513 BEARING ASSEMBLY, THRUST CARRIER/ OVERRUN CLUTCH 514 CARRIER ASSEMBLY, OVERDRIVE 515 WASHER, PINION THRUST 516 WASHER, PINION THRUST (STEEL) 517 ROLLER, NEEDLE BEARING 518 PINION, OVERDRIVE PLANET 519 PIN, OVERDRIVE PINION 520 RETAINER, PINION PIN 521 RING, SNAP 522 RING, SNAP (TURBINE SHAFT/CARRIER) 523 RING, SNAP (4TH CLUTCH) 524 PLATE, 4TH CLUTCH BACKING 525 PLATE ASSEMBLY, 4TH CLUTCH 526 PLATE, 4TH CLUTCH 527 SEAL, 4TH CLUTCH (INNER) 528 PISTON, 4TH CLUTCH 529 HOUSING, 4TH CLUTCH 530 PLUG, ORIFICE 531 SEAL, 4TH CLUTCH (OUTER) 532 SPRING GUIDE & RETAINER ASSEMBLY, 4TH CLUTCH 533 RING, SNAP (SPRING & RETAINER ASSEMBLY 4TH CLUTCH PISTON) 534 BALL, 0.28'DIA. 535 BUSHING, OVERRUN CLU. HSG. 536 BUSHING, 1.12'0.D. X 0.50' 537 BALL, CHECK

REFER TO FIGURE 5:

530 PLUG, ORIFICE CENTER SUPPORT 537 BALL, CHECK 601 BEARING ASM., THRUST CARRIER/FORWARD CLUTCH 602 HOUSING ASSEMBLY, FORWARD CLUTCH 603 SEAL, CLUTCH (CENTER) 604 SEAL, CLUTCH (OUTER) 605 SEAL, CLUTCH (INNER) 606 PISTON, FORWARD CLUTCH 607 SPRING & RETAINER ASSEMBLY 608 RING, SNAP 609 PLATE, CLUTCH (.054 DISHED) 610 PLATE, CLUTCH (.0775 FLAT) 611 PLATE ASSEMBLY, CLUTCH 612 WASHER, THRUST CLUTCH HUB HOUSING 613 HUB, FORWARD CLUTCH DRIVEN 614 WASHER, THRUST FORWARD CLUTCH 615 HUB, DIRECT CLUTCH DRIVING 616 RING, SNAP (6.24 O.D. X.062) 617 PLATE, DIRECT CLUTCH BACKING 618 PLATE, CLUTCH (.0915 FLAT) 619 PISTON, DIRECT CLUTCH 622 SEAL, CLUTCH (CENTER) 623 HOUSING, DIRECT CLUTCH 624 SPRAG ASSEMBLY, INTERMEDIATE CLUTCH 625 RACE, INTERMEDIATE CLUTCH (OUTER) 626 RETAINER, INTERMEDIATE CLUTCH 627 RING, EXTERNAL LOCKING 628 BAND ASSEMBLY, FRONT 629 RING, SNAP (INTERMEDIATE CLUTCH RETAINER) 630 PLATE, INTERMEDIATE CLUTCH BACKING 631 PLATE ASSEMBLY, INTERMEDIATE CLUTCH 632 PLATE, INTERMEDIATE CLUTCH 633 RING, SNAP CENTER SUPPORT/CASE 634 RING, SNAP INTERMEDIATE CLUTCH 635 SPRING & RETAINER ASM., INTERMEDIATE CLUTCH 636 PISTON, INTERMEDIATE CLUTCH 637 SEAL, INTERMEDIATE CLUTCH (INNER) 638 SEAL, INTERMEDIATE CLUTCH (OUTER) 639 RING, OIL SEAL 640 SUPPORT & RACE ASSEMBLY, CENTER 642 WASHER, THRUST SUPPORT/REACTION DRUM 643 SPACER, SUPPORT TO CASE 644 ROLLER CLUTCH ASSEMBLY 645 RING, REACTION DRUM SPACER 646 RACE, THRUST BEARING TO CENTER SUPPORT 647 BEARING, NEEDLE THRUST 648 RACE, THRUST BEARING 649 SHAFT ASSEMBLY, SUN GEAR 650 GEAR, SUN 651 DRUM & CARRIER ASSEMBLY, REACTION 652 WASHER, PINION THRUST (BRONZE) 653 WASHER, PINION THRUST (STEEL) 654 ROLLER, NEEDLE BEARING 655 PINION, PLANET 656 PIN, PLANET PINION 657 BAND ASSEMBLY, REAR BRAKE 658 RING, FRONT INTERNAL GEAR 659 WASHER, FRONT INTERNAL/REACTION CARRIER 660 RING, OUTPUT SPEED SENSOR 661 CARRIER ASSEMBLY, OUTPUT 662 SHAFT, TRANSMISSION MAIN 663 RACE, THRUST BEARING TO SUN GEAR 664 BEARING, NEEDLE THRUST RR INTERNAL GEAR 665 RACE, THRUST BEARING TO RR INTERNAL GEAR 666 GEAR, REAR INTERNAL 669 RACE, THRUST BEARING TO OUTPUT SHAFT 670 RING, SNAP MAINSHAFT INTERNAL GEAR 671 SHAFT & BUSHING ASSEMBLY, OUTPUT 672 RING, SNAP (OUTPUT SHAFT/ FRONT INTERNAL GEAR) 673 WASHER, THRUST 674 WASHER, THRUST SELECTIVE 675 SEAL, O-RING OUTPUT SHAFT 676 BUSHING, SUN GEAR SHAFT 677 BUSHING, OUTPUT SHAFT 678 BUSHING 679 BUSHING, 1.536" DIA. X 3.52" 680 BALL, CHECK 681 BUSHING, REACTION DRUM 682 SLEEVE, TRANS. OUTPUT SHAFT YOKE SEAL 683 SEAL, OUTPUT SHAFT 684 PLATE, CLUTCH (WAVED)

REFER TO FIGURE 6:

33 CLAMP, ELECTRICAL CABLE 38 CLAMP, LUBE PIPE 40 SWITCH ASM., A/TRANS. FLUID PRESSURE 43 STOP, OIL (DIPSTICK) 311 2-3 SHIFT SOLENOID & O-RING ASSEMBLY 313 1-2 SHIFT SOLENOID & O-RING ASSEMBLY 320 PRESSURE CONTROL SOLENOID 323 TCC PWM SOLENOID

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.