Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1993 Cadillac Eldorado V8-300 4.9LFACTORY OEM SERVICE PROCEDURE
Transmission Connector
Technical Service Bulletin No.: 93-I-4
Date: Oct. 1992
GROUP: 7
CORP. NO.: 277133
SUBJECT:
NEW TRANSMISSION CONNECTOR FOR 1993 DE VILLES, 60 SPECIALS, ELDORADOS, AND SEVILLES WITH HYDRA-MATIC 4T60-E
1993 Hydra-Matic 4T60-E (RPO M13) transaxles all use a redesigned transaxle electrical connector. Refer to Figure 1 to read the transmission date code. The redesign involves the addition of two alignment ribs to the electrical connector. The change also requires that the engine connector be modified to accommodate the added alignment ribs. Refer to Figure 2.
The new design was implemented to eliminate the possibility of bending the contact blades of the transaxle electrical connector.
IMPORTANT:
When servicing prior 4T60-E transaxle models (1991-1992), it is essential that the old (prior) electrical connector be used.
When servicing 1993 4T60-E model transaxles, either the old (prior) or new electrical connector can be used.
To diagnose a 1993 model vehicle using a Kent-Moore Transmission Test Box (J-38791) it will be necessary to modify the existing Kent-Moore adapter harness (J-38791-10 and/or J-38791-20) to accommodate the added alignment ribs. This can be done by removing the outermost radius of material. Refer to Figure 3. This will prevent interference from the added alignment ribs and will allow use of both previous and new style transaxle electric connectors.
An alternative to modifying the existing adapters would be to purchase new Kent-Moore adapters (J-38791-93) which are used in conjunction with adapters J-38791-10 and/or J-38791-20. These new adapters simulate the modified engine harness connector. The Kent-Moore adapters produce the same results as with the procedure above but without altering the existing adapters.
NOTE:
J-38791-93 contains two adapters. One from test box harness to transaxle, the other from text box harness to engine.
NOTE:
J-38791-93 will not be available through Kent-Moore until late December, 1992.
Service Part Information
Parts are currently available from GMSPO.
Date: Oct. 1992
GROUP: 7
CORP. NO.: 277133
SUBJECT:
NEW TRANSMISSION CONNECTOR FOR 1993 DE VILLES, 60 SPECIALS, ELDORADOS, AND SEVILLES WITH HYDRA-MATIC 4T60-E
1993 Hydra-Matic 4T60-E (RPO M13) transaxles all use a redesigned transaxle electrical connector. Refer to Figure 1 to read the transmission date code. The redesign involves the addition of two alignment ribs to the electrical connector. The change also requires that the engine connector be modified to accommodate the added alignment ribs. Refer to Figure 2.
The new design was implemented to eliminate the possibility of bending the contact blades of the transaxle electrical connector.
IMPORTANT:
When servicing prior 4T60-E transaxle models (1991-1992), it is essential that the old (prior) electrical connector be used.
When servicing 1993 4T60-E model transaxles, either the old (prior) or new electrical connector can be used.
To diagnose a 1993 model vehicle using a Kent-Moore Transmission Test Box (J-38791) it will be necessary to modify the existing Kent-Moore adapter harness (J-38791-10 and/or J-38791-20) to accommodate the added alignment ribs. This can be done by removing the outermost radius of material. Refer to Figure 3. This will prevent interference from the added alignment ribs and will allow use of both previous and new style transaxle electric connectors.
An alternative to modifying the existing adapters would be to purchase new Kent-Moore adapters (J-38791-93) which are used in conjunction with adapters J-38791-10 and/or J-38791-20. These new adapters simulate the modified engine harness connector. The Kent-Moore adapters produce the same results as with the procedure above but without altering the existing adapters.
NOTE:
J-38791-93 contains two adapters. One from test box harness to transaxle, the other from text box harness to engine.
NOTE:
J-38791-93 will not be available through Kent-Moore until late December, 1992.
Service Part Information
Parts are currently available from GMSPO.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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