SERVICE REPLACEMENT TRANSMISSION ASSY.(SRTA)

TRANSMISSION APPLICATIONS: 4L80-E/4L80-EHD

TRANSMISSION MODELS:

SUBJECT: HYDRA-MATIC REPLACEMENT TRANSMISSION ASSEMBLY (SRTA)

VEHICLE APPLICATIONS: 1991 C,E,K,P,R,V TRUCKS AND G-VANS

Bulletin Covers:

The HYDRA-MATIC 4L80-E/4L80-EHD Service Replacement Transmission Assembly (SRTA) program began on September 1, 1990 .The SRTA models can be ordered for all 1991 HYDRA-MATIC 4L80-E/4L80-EHD model applications from your local Canada Parts Operation (CANSPO).

The HYDRA-MATIC 4L80-E/4L80-EHD program is customer satisfaction driven and parallels the existing SRTA 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:

SRTA ADVANTAGES:

A SRTA is the product of a highly successful, customer satisfaction driven program providing the technician with a service alternative when addressing diagnostic and overhaul concerns.

All SRTA units are designed and remanufactured to current engineering specifications and are often less costly than a major overhaul.

IN THE INTEREST OF CUSTOMER SATISFACTION, SRTA MODELS SHOULD ONLY BE CONSIDERED WHEN THE PROJECTED COST OF REPAIR EXCEEDS THE COST OF A SRTA REPLACEMENT.

Due to limited availability of all SRTA models, SRTA usage should ONLY be considered for the following condition:

Repairs in which the projected cost exceeds the cost of the SRTA replacement.

Dealer 4L80-E/4L80-EHD transmission repairs include:

All on-car serviceable items.

All internal repairs which are projected to cost less than a SRTA replacement.

TRANSMISSION FLUID COOLER FLUSHING:

IMPORTANT: Flushing transmission fluid cooler and lines MUST be performed whenever a transmission is removed for service. It is essential to flush the cooler and lines prior to transmission installation or 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.

SRTA PROCESSING PROCEDURES:

Each SRTA unit will be shipped in a container which must be used for core return of the original 4L80-E/4L80-FHD assembly to your CANSPO Centre. 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. Refer to Figure 1.

SRTA PROCESSING PROCEDURES INFORMATION PACKET:

The contents of this envelope include Limited Warranty Information, Dealer Product Feedback Form, Core Exchange Return Procedure, and a pre-addressed return mailing envelope. A Dealer representative is to explain all warranty information contained in this envelope to the customer. Refer to Figure 2.

SRTA PROCESSING PROCEDURES - CORE EXCHANGE RETURN:

The core return procedure provides detailed instructions for the General Motors Dealer on handling of the SRTA and original 4L80-E/4L80-EHD units. This sheet can be discarded after use. Refer to Figure 3.

SRTA PROCESSING PROCEDURES - FAILURE ANALYSIS INFORMATION:

This Product Feedback Form is to be completed by the Service Manager and/or technician. Fill out this 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 bell housing of the unit being returned for core exchange. Refer to Figure 4.

4L80-E/4L80-EHD TRANSMISSION IDENTIFICATION INFORMATION: --------------------------------------------------------- The 4L80-E/4L80-EHD transmission identification information and the "SRTA MODEL REPLACEMENT CHART" will assist in selecting the correct SRTA Unit to order from your local CANSPO Centre. Refer to Figure 5.

SRTA MODEL REPLACEMENT CHART:

SRTA PART MODEL NUMBER DESCRIPTION ----- ------- ---------------- 4.3L AND 5.7L APPLICATIONS: ------------------------------ 1ABP 8679910 4.3L V6 LB4 - C and P-Truck 1ACP 8679911 4.3L V6 LB4 - K-Truck 4WD 1BAP 8679913 5.7L V8 L05 - C,R,G and P-Truck 1BBP 8679914 5.7L V8 L05 - G-Van Slip Yoke 1BJP 8679915 5.7L V8 L05 - K and V 4WD 1BMP 8679916 5.7L V8 L05 - P-Truck 12-15K w/JF9 IBNP 8679917 5.7L V8 L05 - C-Truck 12-15K w/JF9

DIESEL APPLICATIONS:

1CAP 8679918 6.2L V8 LL4 - C,R,G and P Truck 1CBP 8679919 6.2L V8 LL4 - C-Truck Slip Yoke 1CKP 8679921 6.2L V8 LL4 - K and V Truck 10K 4WD 1CRP 8681954 6.2L V8 LL4 - P-Truck 12-15K w/JF9

7.4L APPLICATION: ------------------ 1DBP 8679922 7.4L V8 L19 - G-Van 3.42-3.73 Axle 1DCP 8679923 7.4L V8 L19 - C,G, R 4.10-4.56 Axle 1DDP 8679924 7.4L V8 L19 - G 4.10-4.56 Slip Yoke 1DFP 8677925 7.4L V8 L19 - P-Truck 1DKP 8679926 7.4L V8 L19 - K and V-Truck 4WD 3.42 - 3.73 1DLP 8677927 7.4L V8 L19 - K and V-Truck 4WD 4.10 - 4.56 1DNP 8677928 7.4L V8 L19 - P-Truck 12-15 w/JF9 1DPP 8677929 7.4L V8 L19 - P-Truck 15-16.5K w/JF9 1DRP 8679930 7.4L V8 L19 - C-Truck 12-15K W/JF9 1DSP 8680903 7.4L V8 L19 - C-Truck 5.6K 4.10 Axle

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.