BULLETIN SUMMARY MANUAL 700-R4 BULLETIN LISTING

CONTENTS Page

INTRODUCTION ii

SECTION 1 - TRANSMISSION IDENTIFICATION

Transmission Models, Vehicle and Engine Type...............1 Transmission Identification Numbers .......................3

SECTION 2 - BULLETIN SUMMARY

When Making Internal Repairs These Bulletins Should Be Followed Where Applicable .......................4

SECTION 3 - BULLETIN SUMMARY

Additional Bulletins Provided For Quick Reference..........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 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 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 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 the bulletin numbers grouped according to common repairs, i.e., Shift Condition, 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 1 - TRANSMISSION IDENTIFICATION

TRANSMISSION MODELS, VEHICLE AND ENGINE TYPE - 1982

**Electrical Trans. Wiring Type 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) 5.0L & 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 & 5.7 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. L K-Truck (Federal) 5 3TE 5.0L & 5.7 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 6.2L 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 Vehicle 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/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) 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. L 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 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 Plug 7 8642473 Plug Plug 8643710 8 Plug Plug Plug 8643710 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: 2 = 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 im- portant 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 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 SUMMARY

WHEN MAKING INTERNAL REPAIRS ON ANY 1982 THRU 1984 THM 700-R4 TRANSMISSION THE FOLLOWING PARTS SHOULD BE CAREFULLY EXAMINED AND REPLACED WHERE APPLICABLE:

BULLETIN MODELS AND SUBJECT/SUMMARY CONDITION NUMBERS PROD.DATE --------------- --------- -------- --------- Service information for the forward General Service 83-1-136 All THM sprag clutch - Sprag conversion kit Information Sect. 7 700-R4 prior to service all forward sprag clutch. to Julian Part Number 8647050 changed to date 123, 8647458 in this bulletin. 1982

Revised design snap ring for the Snap ring for the 83-1-90 All THM reaction sun gear and low and reaction sun gear Section 7 700-R4 or reverse spring retainer to case - and lo and reverse to Julian Snap ring revised to prevent over spring retainer date 244, expanding. Part Number 8647337. over expanded. 1983

Input carrier to output shaft Input carrier to 83-1-88 All 1982 & snap ring - Replace the snap ring output shaft snap Section 7 1983 to prevent over expansion. (Use ring disiodged or THM 700-R4 tool number J-34627 to install over expanded. snap ring.)

No 2nd, 4th, or reverse gear Reaction sun gear 83-1-122 All THM operation - inspection of the shell has a broken Section 7 700-R4 reaction sun gear shell. Part hub or stripped Number 8642203. spline.

Grinding noise in all ranges or Grinding noise or 84-7-7 All THM no drive condition-New reaction no drive condition 700-R4 prior internal gear 8654161 has a in all ranges. to Julian change in the parking lugs and date 009, internal gear teeth. 1984

Burned 3-4 clutch - New input Burned 3-4 clutch 84-7-18 All THM clutch housing and control valve 700-R4 prior body assembly. to Julian date 015, 1984

New servo cover and seal - Provides External oil leak 83-1-124A All THM a tighter seal fit between the case at the 2-4 servo Section 7 700-R4 servo bore and the 2-4 servo cover. cover. prior to Julian date 091,1984

Transmission oil pan leaks - New Transmission oil 83-T-72 All THM transmission oil pan, hex head pan leaks Section 7 700-R4 screw and conical washer prior to assembly. Julian date 206,1983

New link detent lever to manual Broken or cracked 83-1-178 All THM valve - New link detent lever manual valve rod Section 7 700-R4 8654113 eliminates clip rod end. end clip. prior to Julian date 186,1983

No 4th gear and/or burned 2-4 No 4th gear and/or 83-T-26 All THM band assy. - 2-4 Servo exhaust burned 2-4 band Section 7 700-R4 hole blocked by RTV. assembly. 1982-1983

Shift conditions that T.V. cable Erratic shift 83-1-146 All THM adjustments will not correct - conditions that Section 7 700-R4 Repair procedure to correct T.V. cable adjust- All 1982 & sticking throttle valve and ments will not 1983 related parts. correct.

SECTION 3

THE FOLLOWING SERVICE BULLETINS ARE FOR YOUR OUICK REFERENCE:

BULLETIN MODELS AND SUBJECT/SUMMARY CONDITION NUMBERS PROD.DATE --------------- --------- -------- ---------- Erratic or no upshifts - Erratic or no 83-T-59 All THM Diagnosis procedure and upshifts Section 7 700-R4 guidelines for servicing governor gear.

Diagnosis procedure for a Slipping 1-2 shift 83-T-27 All THM burned 2-4 band and/or 304 or no 1-2 shift Section 7 700-4R clutch - Procedure is a general and/or slipping guide to be used with your 2-3 shift or no service manual. 2-3 shift.

No drive and reverse - Oil No drive and 83-T-33 All THM pump assembly parts information reverse Section 7 700-R4 when servicing the oil pump. 1982-1983

NOTE: Part Number 8647190 changed to 8654019, and Part 8647189 changed to 8654018.

Harsh and delayed upshifts-New Harsh and delayed 83-T-57 All THM TV exhaust check ball in the upshifts Section 7 700-R4 control valve body assembly. 1982-1983

Harsh Manual 2-1 Downshift Feel Harsh Manual 2-1 83-T-64A All THM and/or Delayed Downshifts-New Feel and/or Section 7 700-R4 control valve body and spacer Delayed 1982-1983 plate. Downshifts.

Lock-up in reverse-Procedure to 4-3 sequence valve 84-7-6 All THM check for stuck shift valves. or 2-3 shift valve 700-R4 stuck

Reverse input piston dishing- Slipping in 83-T-37 All THM inspection of reverse input reverse or no Section 7 700-R4 piston assembly. reverse.

Procedure to check for possible High oil 83-1-93 All THM lack of lubrication-When overhaul- temperature, Section 7 700-R4 ing a transmission which shows burned transmis- signs of high oil temperature (such sion oil, and as burned transmission fluid, parts parts turned turned blue, etc.) Check blue. lubrication passages.

Transmission overheating-When No torque 83-1-153 driven in 4th gear (overdrive) converter clutch Section 7 and the converter clutch is not apply and trans- operational. mission is over- heating in 4th gear overdrive.

Burned 3-4 clutch-New spacer Burned 3-4 clutch 83-T-73 9Y6,3YH,3Y9 plate. Also refer to divisional Section 7 THM 700-R4 bulletin HM 83-28, corporate 1982 and number 803-7805. 1983

Oil pump seal-Oil pump seal Pump oil seal 83-T-38 All THM assembly leaking or blown out leaking or blown Section 7 700-R4 of the pump body. Service pro- out of the pump Prior to cedure to revise the drain-back body. Julian Date passage in the pump body. 127,1983

Diagnosis transmission oil leaks. External oil 83-1-99 All THM leaks Section 7 700-R4

Transmission oil exhausting out Transmission oil 84-7-5A All THM the breather-New Oil pump assembly exhausting out 700-R4 and gasket. the breather Prior to Julian Date 196, 1983

Case extension oil seal assembly- Case extension 83-1-81 All THM Procedure for installing the yoke oil seal leaks. Section 7 700-R4 on the output shaft. 1982-1983

Low and reverse piston installa- General Service 83-1-150 All THM tion and removal-Correction Information Section 7 700-R4 procedure to prevent damage to 1983 & 1984 piston seals.

Pinched TCC solenoid wires- T.C.C. inoperative 83-1-82 All THM Special washer to hold the wires Section 7 700-R4 in place. prior to Julian date 305,1983 & 1983 Input housing assembly-Air Blocked oil 83-1-65 All THM check procedure to be used passages Section 7 700-R4 during disassembly.

Input housing and shaft assembly Gear clash on 83-1-95 All THM service information-indentificaion four-wheel drive Section 7 700-R4 of new input shaft housing being vehicles during prior to used in four wheel drive vehicles transfer case Julian date to reduce gear clash. shifting 026, 9183

Input clutch housing turbine General Service 83-1-76 All THM shaft redesign-identification and Information Section 7 700-R4 parts information for first and second design input clutch housing turbine shaft and related parts.

Accumulator spring usage chart- General Service 83-1-115 All THM Quick reference chart for spring Information Section 7 700-R4 usage and proper spring location. 1982 & 1983

Transmission end play service General Service 83-1-118 All THM information-Transmission end play Information Section 7 700-R4 helpful information.

End play checking tools-infor- General Service 83-1-123 All THM mation of tools available. Information Section 7 700-R4

Oil pressure switch information General Service 83-1-168 All THM Procedure to check oil pressure Information Section 7 700-R4 switches. Also parts and color code information.

Diagnosing low oil pressure or Low oil pressure 83-T-40 All THM cavitation noise-Oil filter or oil pump Section 7 700-R4 body or "O" ring may be cracked. cavitation noise.

Service Procedure for the oil General Service 84-7-19 THM 700-R4 pump rotor and slide-Oil pump Information 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.