A/T - THM 44-T4 Service Manual Update Information

87pontiac15
Number 87-7-50 Date 12/87


SERVICE MANUAL UPDATE INFORMATION.
Subject: 1986 AND 1987 THM 440-T4 (ME9)

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.

Figure 3 - Transaxle Internal Components:

Figure 4 - Shift Speed Chart:

Figure 5 - New Thermal Element Pin Height Gage J 34094-A:

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

Figure 1 - 1986 Preliminary Check Procedure:

Figure 2 - 1987 Preliminary Check Procedure:

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