THM 125C SRTA PROGRAM GUIDELINE INFORMATION

MODELS AFFECTED: ALL VEHICLES EQUIPPED WITH THM 125C TRANSAXLES

BULLETIN COVERS:

Effective October 1, 1987, the THM 125C Service Replacement Transmission Assembly (SRTA) Program begins. At the start of the program, SRTA models can be ordered for all 1982 through 1986 THM 125C model applications from your local General Motors Service Parts Operation (GMSPO) Parts Distribution Center. In early 1988, the THM 125C SRTA Program will be expanded to also include 1987 and 1988 model year applications.

The THM 125C SRTA program is customer satisfaction driven and parallels the existing THM 440-T4 and 700-R4 programs. Unit replacement through SRTA represents an additional method of service which General Motors dealers and Divisions can offer the customer in instances where major overhaul is necessary. Additional program details are provided as follows:

SECTION PAGE

General Guidelines - Replacement or Overhaul.......... 1 Transaxle Fluid Cooler Flusher........................ 2 Install Case Vent Assembly............................ 2 SRTA Processing Procedures............................ 3-6 THM 125C Transaxle Identification..................... 7 SRTA Model Replacement Chart.......................... 8

GENERAL GUIDELINES - REPLACEMENT OR OVERHAUL

o Due to limited availability of all SRTA models, SRTA usage should only be considered for the following conditions: - Repairs in which the projected cost exceeds the cost of the SRTA replacement.

o Dealer THM 125C transaxle repairs include: - All on-car serviceable items. - All internal repairs which are projected to cost less than a SRTA replacement.

TRANSAXLE FLUID COOLER FLUSHING

IMPORTANT: ---------- Transaxle fluid cooler flushing must be performed whenever a transaxle is removed for service. It is essential to flush the cooler after SRTA installation, major overhaul, if fluid contamination is suspected, or in any case of pump or torque converter replacement. A cooler flushing tool, Kent- Moore number J 35944, has been sent to your dealership to properly flush the cooler. Time allowance to use the cooler flushing tool is 0.6 hours. This allowance is included in operation number K7000 (Trans R&R) for 1987-1988 model year Labor Time Guides and can be added to R&R allowances for 1982 through 1985 model years.

INSTALL CASE VENT ASSEMBLY

IMPORTANT: ---------- Before installing the THM 125C SRTA unit into the vehicle, remove and discard the plastic case vent. (It is only used for shipping purposes.) Included with each SRTA unit is package number 8652982 that contains two metal case vents. Select and install the same design metal vent as the one on the transaxle being replaced.

o SRTA Processing Procedures (Figure 1)

Each SRTA unit will be shipped in a container which must be used for core return of the original THM 125C assembly to your GMSPO Parts Distribution Center. A SRTA information Packet is included with each SRTA unit. The contents of this envelope are to be removed and used as described with each illustration on the following pages.

o SRTA Processing Procedures - Information Packet (Figure 2)

The contents of this envelope include Limited Warranty Information, Dealer Product Feedback Form, Core Exchange Return Procedure, and a preaddressed return mailing envelope. A dealer representative is to explain all warranty information contained in this envelope to the customer.

o SRTA Processing Procedures - Core Exchange Return (Figure 3)

The core return procedure provides detailed instructions for the GM dealer on handling of the SRTA and original THM 125C units. This sheet can be discarded after use.

o SRTA Processing Procedures - Failure Analysis Information (Figure 4)

This Product Feedback Form is to be completed by the service manager and/or technician. Fill out the form as completely as possible to provide information which can be used for analysis. This valuable input can result in future product refinement through corrective action. Insert the white copy of the completed form and a copy of the repair order into the SRTA information Packet envelope, reseal the envelope and wire tag it to the bellhousing of the unit being returned for core exchange. Return the yellow copy of the completed Product Feedback Form, using the post paid envelope, to Hydra-matic Division.

o THM 125C Transaxle Identification Information (Figure 5)

The 125C transaxle identification information and the SRTA model replacement chart (Figure 6) (refer to page 8) will assist in selecting the correct SRTA unit to order from your local Parts Distribution Center.

NOTE: Part numbers are accurate at time of printing and subject to change. Refer to the latest GMSPO Parts Catalog for part numbers of SRTA models listed.

SRTA PART ORIGINAL TRANSMISSION MODEL YEAR AND MODEL MODEL NUMBER 1982 1983 1984 1985 1986 ----- ------ ---- ---- ---- ---- ---- 2C3 8660953 2C3 -- -- -- -- 2CJ 8660952 2CJ -- -- -- -- 2HC 8660954 2HC, 2HI -- -- -- -- 2HY 8660955 2HU, 2HY -- -- -- -- 3BF 8660935 2BF 3BF -- -- -- 3BL 8660936 2BL 3BL -- -- -- 3CA 8660937 -- 3CA -- -- -- 3CB 8660938 2CI, 2CU 3CB -- -- -- 3CC 8660939 -- 3CC, 3CD -- -- -- 3CE 8660957 2CE 3CE -- -- -- 3CF 8660940 2CF 3CF -- -- -- 3CL 8660941 2CL 3CL -- -- -- 3CT 8660941 2CT 3CK, 3CT -- -- -- 3HC 8660947 2HR 3HC -- -- -- 3HD 8660948 2CD 3HD -- -- -- 3HS 8660949 2HS 3HS -- -- -- 3HW 8660950 2H6 3HW -- -- -- 3HY 8660951 -- 3HY -- -- -- 3OP 8660958 2OP 3OP -- -- -- 3P3 8660946 2P3 3P3 -- -- -- 3PD 8660943 2PD, 2PI 3PD -- -- -- 3PG 8660944 2PG 3PG -- -- -- 3PW 8660945 2PW, 2PL 3PW -- -- -- 4CC 8660931 -- -- 4CC -- -- 4HC 8660932 -- -- 4HC 5H4 -- 4HY 8660933 -- -- 4HY 5H3 -- 4OP 8660934 -- -- 4OP -- -- 5BF 8660926 -- -- 4BF 5BF -- 5BL 8660927 -- -- 4BL 5BL -- 5C2 8660929 -- -- 4CF 5C2 -- 5CE 8660928 -- -- 4CE 5CE -- 5OP 8660930 -- -- -- 5OP -- 6BA 8660908 -- -- -- -- -- 6BP 8660909 -- -- -- 5BP 6BDC, 6BPC 6CA 8660910 -- -- 4CA 5C4, 5CA, 5CC 6CAC, 6CCC 6CB 8660911 -- -- 4CB 5C3, 5CB, 5CI 6CBC, 6CMC 6CD 8660912 -- -- -- 5CD 6CDC 6CJ 8660913 -- -- -- 5CJ 6CJC 6CK 8660914 -- -- 4CI, 4CK 5CK 6CKC 6CL 8660915 -- -- 4CL 5CL 6CLC 6CP 8660959 -- -- -- -- 6CPC 6CT 8660916 -- -- -- 5CT 6CTC 6CX 8660917 -- -- -- 5CU, 5CX 6CUC, 6CXC 6HS 8660924 -- -- 4HS 5HS 6HSC 6HU 8660925 -- -- 4HV 5HV 6HUC 6PA 8660918 -- -- 4PJ 5P2, 5P5, 5PJ 6PAC, 6PJC 6PD 8660919 -- -- 4PD 5PD 6PDC 6PF 8660956 -- -- 4PF 5PF 6PFC 6PH 8660920 -- -- 4PE 5P4, 5PE 6PHC, 6PRC 6PK 8660921 -- -- 4PG 5P3, 5PG 6PKC 6PN 8660922 -- -- -- 5PN 6PNC 6PW 8660923 -- -- 4PW 5PW 6PWC

Figure 6 - THM 125C SRTA Model Replacement Chart

NOTE: Part numbers are accurate at time of printing and subject to change. Refer to the latest GMSPO Parts Catalog for part numbers of SRTA models listed.

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.