BULLETIN SUMMARY MANUAL 700-R4 BULLETIN LISTING

Model and Year 1982-84

THM 700-R4 TRANSMISSION PUBLICATION BULLETIN SUMMARY MANUAL

CONTENTS

PAGE

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . 2 - 3

SECTION 1 - TRANSMISSION IDENTIFICATION

Transmission Models, Vehicle and Engine Type . . . . . 4 - 6

Transmission Identification Numbers . . . . . . . . . 7 - 8

SECTION 2 - BULLETIN SUMMARY

When Making Internal Repairs These Bulletins Should be Followed Where Applicable . . . . . . . . . 9 - 14

SECTION 3 - BULLETIN SUMMARY

Additional Bulletins Provided for Quick Reference . . . . . . . . . . . . . . . . . . . . . . 14 - 15

INTRODUCTION: During 1982 and 1984, many production changes have been added to the THM 700-R4 transmission. The number of bulletins released has become too large to reference quickly. However, it is very important to find and use current information whenever you are servicing this transmission. This summary manual is to assist you in finding the bulletins you need quickly.

This summary manual contains the numbers and subjects for service bulletins that pertain to the THM 700-R4 transmissions installed into 1982 thru 1984 model vehicles.

OBJECTIVES: When you have read this summary manual, you will be able to:

Locate the transmission identification number.

Identify transmission models, vehicle and engine types.

Locate the service bulletins which pertain to the THM 700-R4 transmission, including latest part numbers and service procedures.

Decide if the content of a particular bulletin relates to the condition of the transmission.

ORGANIZATION: This summary manual is organized as follows:

SECTION 1 - TRANSMISSION IDENTIFICATION

This section provides charts of the transmission models, vehicle, and engine types by year, the location and decoding of the transmission identification numbers.

SECTION 2 - BULLETIN SUMMARY

This section contains charts with bulletin numbers grouped according to common repairs, i.e., shift conditions, no gears, new part part numbers, and service procedures. The service bulletins contained in this section should be used when any internal repairs are being made, to assure transmission has the latest changes if applicable.

SECTION 3 - BULLETIN SUMMARY

This section also contains charts with bulletin numbers grouped according to common repairs, i.e., shift conditions, end play, new part numbers, and service procedures. The service bulletins contained in this section are for your quick reference when making any repairs.

SECTION I - TRANSMISSION IDENTIFICATION

TRANSMISSION MODELS, VEHICLE AND ENGINE TYPE - 1982

**ELECTRICAL TRANS. VEHICLE AND ENGINE TYPE WIRING TYPES MODEL ----------------------- ------------ ----- 1 9T5 (*M7) 5.7L "C" - Truck Heavy Duty 1 9T6 (*MC) 4.1L "C" - Truck (Federal) 2 9TC (*M2) 4.1L "K" - Truck 2 9TE (*ME) 5.0L & 5.7L "C" - Truck (California) 2 9TH (*M4) 5.0L & 5.7L "K" - Truck (California) 1 9TJ (*MD) 5.0L & 5.7L "C" - Truck (Federal & Altitude) 1 9TK (*M5) 5.7L "K" - Truck 3 9TN (*MH) 6.2L "C" - Truck Diesel 2 9TP (*M6) 6.2L "K" - Truck Diesel 2 9TW (*MB) 4.1L "C" - Truck (Nationwide) 4 9YA (*Y6) 5.7L "Y" - Car (Corvette) 4 9YK (*Y3) 5.0L "B" - Car 4 9YL (*Y4) 4.4L "B" - Car

*These models contain the forward roller clutch.

**Refer to your service manual for electrical wiring diagram.

TRANSMISSION MODELS, VEHICLE AND ENGINE TYPE - 1983

ELECTRICAL TRANS. WIRING TYPES MODEL VEHICLE AND ENGINE TYPE ------------ ----- ----------------------- 5 3MB 4.1L "C" - Truck (California) 1 3MC 4.1L "C" - Truck (Federal & Altitude) 1 3MD 5.0L "C" - Truck (Federal & Altitude) 5 3ME 5.0L & 5.7L "C" - Truck (California) 3 3MH 6.2L "C" - Truck Diesel All Light Duty 1 3MJ 4.1L "K" - Truck and "G" Van 1 3MK 5.0L "C" - Truck (Federal & Altitude) 8 3ML 2.8L "S" - Truck (Federal & Altitude) 6 3MS 2.8L "T" - Truck (California) 5 3MW 5.7L "K" - Truck (California) 9 3PQ 2.5L "F" - Car 7 3T2 2.0L "S" - Truck (Federal & Altitude) 8 3T7 2.8L "T" - Truck (Federal & Altitude) 2 3T8 6.2L "K" - Truck Diesel 1 3TC 4.1L "K" - Truck (Federal) 5 3TE 5.0L & 5.7L "C" - Truck (California)

2 3TH 5.7L "K" - Truck Heavy Duty 1 3TK 5.0L & 5.7L "K" - Truck (Federal & Altitude) 3 3TL 6.2L "C" - Truck and "G" Van Diesel H.D. 2 3TP 6.2L "K" - Truck Diesel All 2 3TS 6.2L "K" - Truck Diesel Heavy Duty 2 3TZ 6.2L "K" - Truck Diesel Heavy Duty 7 3VA 2.0L "S" - Truck (Federal & Altitude) 2 3VH 5.7L "C" - Truck Heavy Duty 3 3VJ 6.2L "C" - Truck Diesel Light & Heavy Duty 5 3VN 4.1L "C" - Truck and "G" Van (California) 4 3Y9 5.7L "Y" - Car (Corvette) 9 3YF 2.8L "F" - Car 4 3YG 5.0L "F" - Car 9 3YH 2.8L "F" - Car High Output 4 3YK 5.0L "B" - Wagon 4 3YN 5.7L "B" - Car (Police) 4 3YP 5.0L "F" - Car

TRANSMISSION MODELS, VEHICLES AND ENGINE TYPE - 1984

ELECTRICAL TRANS. WIRING TYPES MODEL VEHICL AND ENGINE TYPE

5 4MB 4.1L "C" - Truck (California) 1 4MC 4.1L "C" - Truck (Federal & Altitude) 1 4MD 5.0L "C" - Truck (Federal & Altitude) 4 4ME 5.0L & 5.7L "C" - Truck and "G" Van (California) 10 4MG 6.2L "C" - Truck Diesel (California) 3 4MH 6.2L "C" - Truck Diesel Light Duty 1 4MJ 4.1L "C" - Truck & "G" Van (Fed. & Altitude) 1 4MK 5.0L & 5.7L "C" - Truck & "G" Van (Fed. & Altitude) 8 4ML 2.8L "S" - Truck (Federal & Altitude) 6 4MP 2.8L "S" - Truck (California) 2 4MR 5.0L "C" - Truck Canada 6 4MS 2.8L "T" - Truck (California) 10 4MW 5.7L "K" - Truck (California) 6 4PQ 2.8L "F" - Car 8 4T7 2.8L "T" - Truck (Federal & Altitude) 2 4T8 6.2L "K" - Truck Diesel 1 4TC 4.1L "K" - Truck (Federal) 2 4TD 5.0L "K" - Truck Canada 4 4TE 5.0L & 5.7L "C" - Truck (California)

2 4TH 5.7L "K" - Truck Heavy Duty 2 4TG 5.0L "C" - Truck Canada 1 4TK 5.0L & 5.7L "K" - Truck (Federal & Altitude) 3 4TL 6.2L "C" - Truck and "G" Van Heavy Duty 10 4TM 6.2L "K" - Truck (California) 2 4TZ 6.2L "K" - Truck Diesel Heavy Duty 8 4VA 2.0L "S" - Truck (Federal & Altitude) 10 4VE 6.2L "G" - Van (California) 2 4VH 5.0L "C" - Truck and "G" Van Heavy Duty 3 4VJ 6.2L "C" - Truck and "G" Van 5 4VN 4.1L "C" - Truck and "G" Van (California) 10 4VX 6.2L "C" - Truck Diesel 3 4Y6 5.0L "B" - Car Canada 3 4Y7 2.8L "F" - Car Canada 3 4Y8 5.0L "F" - Car Canada 4 4Y9 5.7L "Y" - Car (Corvette T.B.I.) 4 4YA 5.7L "Y" - Car (Corvette T.B.I. L83 Engine) 9 4YF 2.8L "F" - Car 4 4YG 5.0L "F" - Car 9 4YH 2.8L "F" - Car Heavy Duty 4 4YK 5.0L "B" - Car Wagon 4 4YN 5.7L "B" - Car (Police) 4 4YP 5.0L "F" - Car 4 4YW 5.7L "Y" - Car (Corvette)

Provided below is a chart that shows specific switches required for the various types of transmission usages. Refer to your service manual for wiring diagrams of each vehicle type if needed.

VEHICLE TYPE AND SWITCHES REOUIRED

Type CC SIG SW 3RD CL SW 4-3 DS SW 4TH CL SW ---- --------- --------- --------- ---------- 1 8642473 8643710 8642346 8643710 2 Plug Plug 8642346 8643710 3 Plug Plug 8642346 Plug 4 Plug Plug 8642346 8634475 (8642569) 5 8642473 8643710 8642346 8642473 6 Plug Plug Plug Plug 7 8642473 Plug Plug 8643710 8 Plug Plug Plug 8643710 9 Plug Plug Plug 8634475(8642569) 10 Plug Plug 8642346 8642473

SECTION 1 - TRANSMISSION IDENTIFICATION

TRANSMISSION IDENTIFICATION NUMBERS

Location of Transmission Identification Number

The transmission identification number is located on the right side of the transmission on the pan rail as shown below.

Decoding of the Transmission Identification Numbers

Refer to the chart and steps listed below for detailed explanation of the transmission identification numbers.

MODEL YEAR: Tells what model year the transmission was built.

EXAMPLE: 9 = 1982, 3 = 1983, 4 = 1984, 5 = 1985.

MODEL: Transmission model identification.

JULIAN DATE: Tells what day of the year the transmission was built. EXAMPLE: Julian Date 001 = January 1, and Julian Date 365 = December 31. It is also very important to remember that the transmission model years starts MID YEAR. This means the first transmission built in any model year will start with a higher Julian Date.

EXAMPLE: IF THE FIRST TRANSMISSION IN 1984 WAS BUILT ON AUGUST 5, THEN THE JULIAN DATE STARTS AT 218 AND GOES TO 365 (DECEMBER 31). THE JULIAN DATE WILL THEN DROP TO 001 JANUARY 1, AND THEN CONTINUE TO 217 (AUGUST 4, 1985).

SHIFT BUILT: Tells what shift the transmission was built.

SECTION 2 - BULLETIN SUMMMARY

When making internal repairs on any 1982-84 THM 700-R4 transmission, the following parts should be carefully examined and replaced where applicable:

BULLETIN NUMBERS MODELS AND SUBJECT/SUMMARY CONDITION CHEVROLET PROD. DATE --------------- --------- --------- ---------- Service information for the General Service 83-T-79 All THM 700-R4 forward sprag clutch - sprag Information. Prior to Julian conversion kit to service all Date 123, 1982. forward sprag clutch. P/N 8647050 changes to 8647458 in this bulletin.

Revised design snap ring for Snap ring for the 83-I-85 All THM 700-R4 the reaction sun gear and low reaction sun gear Prior to Julian and reverse spring retainer & lo and reverse Date 244, 1983. to case - snap ring revised spring retainer to prevent over expanding. over expanded. P/N 8647337.

Input carrier to output shaft Input carrier to 83-I-85 All 1982 and 1983 snap ring - replace the snap output shaft snap THM 700-R4 ring to prevent over expan- ring dislodged sion. (Use tool number or over expanded. J-34627 to install snap ring.

No 2nd, 4th, or reverse gear Reaction sun gear 83-I-76 All THM 700-R4 operation - inspection of the shell has a broken reaction sun gear shell. P/N hub or stripped 8642203. spline.

Buzzing noise and possible Buzzing noise and 82-T-146 All THM 700-R4 delayed upshifts - service possible delayed 1982 package 8642974 for the con- upshifts. trol valve body assembly to spacer plate & spacer plate to case gaskets.

Loss of power in drive and Loss of power in 84-93 All THM 700-R4 reverse - pump blades not drive and reverse. Prior to Start retaining their seat in the of 1984 torque converter pump housing. Production

Grinding noise in all ranges Grinding noise or 84-86 All THM 700-R4 or no drive condition - new no drive condition Prior to Julian reaction internal gear, P/N in all ranges. Date 009, 1984 8654161, has a change in the parking lugs and internal gear teeth.

Burned 3-4 clutch, high 2-3 Burned 3-4 clutch, 84-107 All THM 700-R4 shifts - new input clutch high 2-3 shifts. Prior to Julian housing and control valve Date 015, 1984 body assembly.

New servo cover and seal - External oil leak 83-I-115 provides a tighter seal fit at the 2-4 servo All THM 700-R4 between the case servo bore cover. Prior to Julian and the 2-3 servo cover. Date 091, 1984

Transmission oil pan leaks - Transmission oil 84-69 All THM 700-R4 new transmission oil pan, hex pan leaks. Prior to Julian head screw and conical washer Date 206, 1983 assembly.

New link detent lever to Broken or cracked 83-129 manual valve - new link manual valve All THM 700-R4 detent lever, P/N 8654113, rod end clip. Prior to Julian eliminates clip rod end. Date 186, 1983

No 4th gear and/or burned 2-4 No 4th gear and/or 83-T-42 band assembly - 2-4 servo ex- burned 2-4 band All THM 700-R4 haust hole blocked by RTV. assembly 1982-83

Shift conditions that T.V. Erratic shift 83-I-126 All THM 700-R4 cable adjustments will not conditions that All 1982 & 1983 correct - repair procedure to T.V. cable correct sticking throttle adjustments will valve and related parts. not correct.

Erratic or no upshifts - Erratic or no 84-13 All THM 700-R4 diagnosis procedure and upshifts guidelines for servicing governor gear.

Diagnosis procedure for a Slipping 1-2 83-T-43 All THM 700-R4 burned 2-4 band and/or 3-4 shift or no 1-2 clutch - procedure is a shift and/or general guide to be used slipping 2-3 shift with your service manual. or no 2-3 shift.

No drive and reverse oil No drive and 83-T-51 All THM 700-R4 pump assembly parts infor- reverse. 1982-83 mation when servicing the oil pump. NOTICE: P/N 8647190 changed to P/N 8654019 and P/N 8647189 changed to P/N 8654018.

Harsh and delayed upshifts Harsh & delayed 84-11 All THM 700-R4 new T.V. exhaust check ball upshfits. 1982-83 in the control valve body assembly.

Harsh manual 2-1 downshift Harsh manual 2-1 84-43 All THM 700-R4 feel and/or delayed downshifts feel and/or 1982-83 new control valve body and delayed downshifts. spacer plate

Lock-up in reverse - procedure 4-3 sequence valve 84-68 All THM 700-R4 to check for stuck shift or 2-3 shift valve valves. stuck.

Reverse input piston dishing - Slipping in 83-T-55 All THM 700-R4 inspection of reverse input reverse or no piston assembly. reverse.

Procedure to check for possi- High oil 83-I-86 All THM 700-R4 ble lack of lubrication temperature,burned when overhauling a transmis- transmission oil, sion which shows signs of high and parts turned oil temperature (such as blue. burned transmission fluid, parts turned blue, etc.) Check lubrication passages.

Transmission overheating - No torque converter 84-10 All THM 700-R4 when driven in 4th gear (over- clutc happly and drive) and the converter transmission is clutch is not operational. overheating in 4th gear overdrive.

Burned 3-4 clutch - new spacer Burned 3-4 83-124 9Y6, 3YH, 3Y9 plate. Also refer to divi- clutch. THM 700-R4 sional Bulletin 83-T-43. 1982 and 1983

Oil pump seal - oil pump seal Pump oil seal 83-T-59 All THM 700-R4 assembly leaking or blown out leaking or Prior to Julian of the pump body. Service blown out of Date 127, 1983 procedure to revise the drain the pump body. back passage in the pump body.

Diagnosis transmission oil External oil 83-I-95 All THM 700-R4 leaks. leaks.

Transmission oil exhausting Transmission oil 84-61 All THM 700-R4 out the breather - new oil exhausting out the Prior to Julian pump assembly and gasket. breather. Date 196, 1983

Case extension oil seal Case extension 83-I-77 All THM 700-R4 assembly - procedure for oil seal leaks. 1982-83 installing the yoke on the output shaft. General Service 84-9 All THM 700-R4 Lo and reverse piston Information. 1983 and 1984 installation and removal - correct procedure to pre- vent damage to piston seals.

Pinched TCC solenoid wires - 83-I-78 All THM 700-R4 special washer to hold the Prior to Julian wires in place. T.C.C. inoperative. Date 305, 1982 and 1983.

Input housing assembly - air Blocked oil 83-I-60 All THM 700-R4 check procedure to be used passages. during disassembly.

Input housing and shaft assem- Gear clash on 83-I-88 All THM 700-R4 bly service information - four-wheel Prior to Julian identification of new input drive vehicles Date 026, 1983 shaft housing being used in during transfer four-wheel drive vehicles to case shifting. reduce gear clash.

Input clutch housing turbine General Service 83-I-67 All THM 700-R4 shaft redesign - identifica- Information tion and parts information for first and second design input clutch housing turbine shaft and related parts.

Accumulator spring usage General Service 83-I-109 All THM 700-R4 chart - quick reference chart Information. 1982 and 1983 for spring usage and proper spring location.

Transmission end play service General Service 83-I-108 All THM 700-R4 information - transmission Information. end play helpful information.

End-play checking tools - General Service 83-I-124 All THM 700-R4 information of tools avail- Information. able.

Oil pressure switch informa- General Service 83-96 All THM 700-R4 tion - procedure to check Information. oil pressure switches. Also parts for color code infor- mation.

Diagnosing low oil pressure Low oil pressure 83-T-62 All THM 700-R4 or cavitation noise -oil or oil pump filter body or 'O' ring may be cavitation noise. cracked.

1982 service manual update - General Service 83-I-95 All THM 700-R4 artwork to be added in the Information. 1982 service manual.

Service procedure for the oil General Service 84-108 All THM 700-R4 pump rotor and slide - oil Information. pump rotor and slide released for service.

Model and Year 1982-84

This supplements Bulletin 84-119 dated April, 1984 to change Chevrolet bulletin numbers as shown, and should be kept with the original issue.

Changes are as follows:

NOW READS CORRECT NO. --------- ----------- Page 9 Input carrier to output shaft snap ring - replace the snap ring to prevent over expansion. 83-I-85 83-I-76

Page 9 No 2nd, 4th or reverse gear operation - inspec- tion of the reaction sun gear shell. 83-I-76 83-I-125

Page 15 1982 service manual update - artwork to be added in the 1982 ser- Service News vice manual. 83-I-95 Article

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.