For 1990-2009 cars

# 440-T4 AUTOMATIC TRANSAXLE REPAIR PROCEDURES

#### VEHICLES AFFECTED: All With THM 440-T4

Since the introduction of the 440-T4 automatic transaxle in April 1984, most units requiring service have been replaced by Hydra-Matic Division through the Transaxle Exchange Program. During the early part of 1985, Dealers were able to perform certain on-car repairs to the 440-T4. Effective March 3, 1986, Dealers can perform ALL service operations on the 440-T4 or can obtain a complete unit replacement through the use of the new service Replacement Transmission Assembly (SRTA) program.

SRTA represents an additional method of service Dealers can offer the customer should repair become necessary on a 440-T4 automatic transaxle. The SRTA program is specifically designed to reduce vehicle downtime for the customer and enhance quality repair in the Dealership. EFFECTIVE MARCH 3, 1986 THE 440-T4 SRTA PROGRAM REPLACES THE TRANSAXLE EXCHANGE PROGRAM. All parts needed to perform overhaul repair as well as SRTA units can be ordered directly from your local GM Parts Distribution Centre (PDC). SRTA unit price information will be provided by GM Parts.

#### GM of Canada Guidelines

The decision to repair or to use a SRTA unit is to be based on sound judgement. A general guideline of repair or replacement is listed below:

- Indications of major internal repair requirements, especially on the earlier built models, including: a. Metal in bottom of pan b. Burned fluid

- Case casting fluid leaks

- Repairs that cost more than SRTA replacement

The above conditions may warrant SRTA replacement.

#### Training

A two day 440-T4 Transaxle Program for experienced Transmission technicians will be available at your local Training Centre. This two day program will cover all the operational theory and testing procedures required to make an accurate diagnosis and appropriate repair.

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.