TRANSAXLE ELECT. CONNECTOR REDESIGNED(INFORMATIONAL). Cadillac Commercial Limo/Hearse Chassis 1993

For 1990-2009 cars

# TRANSAXLE ELECT. CONNECTOR REDESIGNED(INFORMATIONAL)

#### 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-38791-93containstwoadapters. 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, l992.

#### Service Part Information:

Part Part Number Description Prior (1991-1992) New (1993) ----------- -----------------------------

Connector, Electrical (7-Way) 8651620 8683061

Parts are currently available from GMSPO.

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.