BULLETIN SUMMARY MANUAL 700-R4 BULLETIN LISTING. GMC Truck S15 Pickup - 2WD 1983

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# BULLETIN SUMMARY MANUAL 700-R4 BULLETIN LISTING

#### MODELS: 1982-84 C, K, S, T, G, WITH THM 700-R4 AUTOMATIC TRANSMISSIONS

THM 700-R4 TRANSMISSION PUBLICATION BULLETIN SUMMARY MANUAL

CONTENTS

PAGE INTRODUCTION ii

SECTION 1 -TRANSMISSION IDENTIFICAION

Transmission Models, Vehicle and Engine Type 1

Transmission Identification Numbers 3

SECTION 2 - BULLETIN SUMMARY

When Making Repairs These Bulletins Should Be Followed Where Applicable 5

#### 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 the particular bulletin relates to the condition of the transmission.

#### ORGANIZATION:

------------ This Summary Manual in organized as follows:

SECTION 1. TRANSMISSION IDENTIFICATION - This section provides charts of the transmissin 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 the bulletin numbers grouped according to common repairs, i.e., Shift Conditions, No Gears, New Part Numbers; and Service Procedures. The service bulletins contained in this section should be used when repairs are being made, to assure transmission has the latest changes if applicable.

SECTION 1. TRANSMISSION IDENTIFICATION

#### TRANSMISSION MODELS, VEHICLE AND ENGINE TYPE - 1982

**ELECTRICAL TRANS. WIRING TYPES MODEL VEHICLE AND ENGINE TYPE ------------ ----- ----------------------- 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) 5.7L & 5.0L C - Truck (Federal & Altitude) 1 9TK (*M5) 5.7L K - Truck 3 9TN (*MH) 6.2L C - Truck Diesel 2 9TP (*M6) 6.21 K - Truck Diesel 2 9TW (*MB) 4.1L C - Truck (Nationwide)

* 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) 7 3T2 2.0L S - Truck (Federal & Altitude) 8 3T7 2.8L T - Truck (Federal & Aititude) 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 Heavy Duty 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 6.21 C - Truck Diesel Light & Heavy Duty 5 3VN 4.1L C - Truck and G-Van (California)

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/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 and G-Van (Federal & Altitude) 1 4MK 5.0L & 5.7L C-Truck and G-Van (Federal&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) 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

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 REQUIRED

Type TCC 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 7 8642473 Plug Plug 8643710 8 Plug Plug Plug 8643716 9 Plug Plug Plug 8634475 (8642569) 10 Plug Plug 8642346 8642473

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:

Transmissin model identification.

#### JUUAN 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 year 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 5th 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 SUMMARY

When making repairs on any 1982 thru 1984 THM 700-R4 transmission the following parts should be carefully and replaced where applicable:

BULLETIN MODELS AND SUBJECT/SUMMARY CONDITION NUMBER PROD. DATE

Service information for the General Service 83-B-130 All THM 700-R4 forward sprag dutch - Sprag Information. prior to Julian conversion kit to service all date 123, 1982 forward sprag clutch. Part number 8647050 changed to 8647458 in this bulletin.

Revised design snap ring for Snap ring for the 83-B-99 All THM 700-R4 the reaction sun gear and reaction sun gear prior to Julian low and reverse spring and low and date 244, 1983 retainer to case - Snap ring reverae spring revised to prevent over retainer over expanding. Part number expanded. 8647337.

Input carrier to output shaft Input carrier to 83-B-89 All 1982 & 1983 snap ring - Replace the snap output shaft snap THM 700-R4 ring to prevent over ring dislodged or expansion. (Use tool number over expanded. J-34627 to install snap ring.)

No 2nd, 4th,or reverse gear Reaction sun 84-B-116 All THM operation - inspection of the gear shell has a 700-R4 reaction sun gear shell. Part broken hub or number 8642203 stripped spline.

Buzzing noise and possible Buzzing noise 84-B-49 All THM 700-R4 delayed upshifts - Service and possible 1982 package 8642974 for the delayed upshifts. control valve body assembly to spacer plate and spacer plate to case gaskets.

Loss of Power in Drive and Loss of Power in 84-B-64 All THM 700-R4 Reverse - Pump blades not Drive and pior to start of retaining their seat in the Reverse. 1984 production torque converter pump housing.

Grinding noise in all ranges Grindirig noise or 84-B-56 All THM 700-R4 oe no drive condition - New no drive prior to Julian reaction internal gear condition in all 009, 1984 8654161 has a change in ranges. the parking lugs and internal gear teeth.

Burned 3-4 clutch, high 2-3 Burned 3-4 clutch. 84-B-78 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 84-B-72 All THM 700-R4 Provides a tighter seal fit at the 2-4 servo prior to Julian between the case servo bore cover. date 091, 1984 and the 24 servo cover.

Transmission oil pan leaks - Transmission oil 84-B-46 All THM 700-R4 new transmission oil pan, pan leaks. prior to Julian hex head screw and conical date 206, 1983 washer assembly.

New link detent lever to Broken or 84-B-57 All THM 700-R4 manual valve - New link cracked manual prior to Julian detent lever 8654113 valve rod end date 186,1983 eliminated clip rod end. clip.

No 4 th gear and/or burned No 4th gear 83-B-77 All THM 700-R4 2-4 band assy. 2-4 servo and/or burned 2- 1982-1983 exhaust hole blocked by 4 band assembly. RTV.

Shift conditions that T.V. Erratic shift 83-B-127 All THM 700-R4 cable adjustments will not conditions that All 82 & 83 correct - Repair procedure T.V. cable to correct sticking throttle adjustmente, will valve and related parts. not correct.

Erratic or no upshifts - Erratic or no 84-B-15 All THM 700-R4 Diagnosis procedure and upshifts. guidelines for servicing governor gear.

Diagnosis procedure for a Slipping 1-2 shift 83-B-78 All THM 700-R4 burned 2-4 band and/or 3-4 or no 1-2 shift clutch - Procedure is a and/or slipping 2- general guide to be used with 3 shift or no 2-3 your service manual. shift.

No drive and reverse - Oil No drive and 83-B-84 All THM 7---R4 pump assembly parts reverse. 1982-1983 information when servicing the oil pump. NOTE: Part number 8647190 changed to 8654019 and part 8647189 changed to 8654018.

Harsh and delayed u- Harsh and 84-B-14 All THM 700-R4 upshifts - New TV exhaust delayed upshifts. 1982-1983 check ball in the control valve body assembly.

Harsh Manual 2-1 Downshift Harsh manual 2- 84-B-50 All THM 700-R4 Feel and/or delayed 1 Feel and/or 1982-1983 Downshifts - New control Delayed valve body and spacer plate. Downshifts.

Lock-up in reverse - 4-3 sequence 84-B-28#1 All THM 700-R4 Procedure to check for valve or 2-3 shift stuck shift valves. valve stuck.

Reverse input piston dishing Slipping in 84-B-120 All THM 700-R4 -Inspection of reverse input reverse or no piston assembly. reverse.

Procedure to check for High oil 83-B-97 All THM 700-R4 possible lack of lubrication -temperature, When overhauling a burned transmission which shows transmission oil, sgns of high oil temperature and parts turned (such as burned transmission blue. fluid, parts turned blue, etc.) Check lubrication passages.

Transmission overheating - No torque 84-B-13 All THM 700-R4 When driven in 4th gear converter clutch (overdrive) and the converter apply and clutch is not operational. transmission is overheating in 4th gear overdrive.

Oil pump seal-Oil pump seal Pump oil seal 83-B-98 All THM 700-R4 assembly leaking or blown leaking or blown prior to Julian out of the pump body. Service out of the pump date 127,1983 procedure to revise the body. drainback passage in the pump body.

Diagnosis transmission oil External oil 83-B-111 All THM 700-R4 leaks. leaks.

Transmission oil exhausting Transmission oil 84-B-44 AllTHM 700-R4 out the breather - New oil exhausting out prior to Julian pump assembly and gasket. the breather. date 196, 1983

Case extension oil seal Case extension 83-B-83 All THM 700-R4 assembly - Procedure for oil seal leaks. 1982-1983 installing the yoke on the output shaft.

Low and reverse piston General Service 84-B-12 All THM 700-R4 installation and removal Information. 1983-1984 Correct procedure to prevent damage to piston seals.

Pinched TCC solenoid wires- T.C.C. 83-B-86 All THM 700-R4 Special washer to hold the inoperative. prior to Julian wires in place. date 305, 1982 & 1983 Input housing assembly. Air Blocked oil 83-B-79 All THM 700-R4 check procedure to be used passages. during disassembly.

Input housing and shaft Gear clash on 83-B-104 All THM 700-R4 assembly service information four-wheel drive prior to Julian Identification of new input vehicle during date 026, 1983 shaft housing being used in transfer case four wheel drive vehicles to shifting. reduce gear clash.

Input clutch housing turbine General Service 83-B-87 All THM 700-R4 shaft redesign-Identification Information. and parts information for first and second design input clutch housing turbine shaft and related parts.

Accumulator spring usage General Service 83-B-115 All THM 700-R4 chart - Quick reference chart Information. 1982 & 1983 for spring usage and proper spring location.

Transmission end play General Service 84-B-6 All THM 700-R4 service information - Information. Transmission end play helpful information.

End-play checking tools General Service 83-B-117 All THM 700-R4 Information of tools Information. available.

Oil pressure switch General Service 84-B-35 All THM 700-R4 information - Procedure to Information. check oil pressure switches. Also parts and color code information.

Diagnosing low oil pressure Low oil pressure 83-B-107 All THM 700-R4 or cavitation noise - Oil or oil pump filter body or "O" ring may cavitation noise. be cracked.

Service procedure for the oil General Service 84-B-76 All THM 700-R4 pump rotor and slide - oil Information. pump rotor and slide released for service.

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.