ERRATIC SHIFT/ NO SHIFT SEALER IN GOVERNOR PASSAGES. Buick Electra/Park Avenue 1985

For 1990-2009 cars

# ERRATIC SHIFT/ NO SHIFT SEALER IN GOVERNOR PASSAGES

#### SUBJECT: SERVICE MANUAL UPDATE INFORMATION -------

#### MODELS AFFECTED: ALL 1986-87 VEHICLES EQUIPPED --------------- WITH THM 440-T4 (ME9) TRANSAXLES

#### BULLETIN COVERS

Updates to Service Manual information in the 1986 440-T4 Automatic Transaxle Unit Repair Section and 1987 440-T4 Automatic Transaxle Hydraulic Diagnosis and Unit Repair Sections.

Update the figures in your 1986 and 1987 Service Manuals with the revisions provided in this bulletin (refer to the chart below).

#### SERVICE NOTES

When checking line pressures on a THM 440-T4 transaxle it is important to follow the steps as described in the Preliminary Check Procedure in Figures 1 and 2. Using the T.V. cable to check maximum line pressures will not provide accurate readings.

#### Revised Service Manual Information

Bulletin Figure Figure Number Model Year Section Page Number ------- ----------- ------- ---- ------

1 1986 7A1 - Transaxle Unit Repair 440-T4-03825 4

2 1987 7A - Hydraulic Diagnosis 440-T4-4 3

3 1987 7A1 - Transaxle Unit Repair 440-T4-14 34

4 1987 7A - Hydraulic Diagnosis 440-T4-3 2

5 1986 7A1 - Transaxle Unit Repair 440-T4-69 79

5 1987 7A1 - Transaxle Unit Repair 440-T4-52 79

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.