SERVICE MANUAL UPDATE INFORMATION/ THM 440-T4. Pontiac 6000 1986

For 1990-2009 cars

# SERVICE MANUAL UPDATE INFORMATION/ THM 440-T4

1986-87 6000 AND BONNEVILLE MODELS

#### 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 Model Figure Number Year Section Page Number ------ ---- ------- ---- ------ 1 1986 7A1 - Transaxle Unit Repair 440-T4-5 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.