A/T - New Servo Apply Pin Information

Number 87-7-31 Date 7/87

SERVICE AND PARTS INFORMATION
Subject: ON A NEW SERVO APPLY PIN

1983-86 PARISIENNE AND 1983-87 FIREBIRD MODELS EQUIPPED WITH THM 700-R4 (MD8)


TRANSMISSION MODELS:

All Models

BULLETIN COVERS:

Changes to the second servo apply pin that eliminated the two ring seals. This change eliminates the potential for seal damage during assembly. Testing has shown that any potential leakage in this area will not affect transmission performance.

Figure 1 - THM 700-R4 Transmission Identification Information:

Figure 2:

DATE OF PRODUCTION CHANGE: (Figure 1)

Beginning January 5, 1987 (Julian date 005) THM 700-R4 transmissions were built with the new servo apply pin (Figure 2)..

SERVICE ACTION:

The new second servo apply piston pin (Figure 2) can be used on all 1982-1988 THM 700-R4 transmissions.

NOTICE: If a past design second servo apply pin is used on a THM 700-R4 transmission, seal rings must be installed.

SERVICE PARTS INFORMATION:

SECOND SERVO APPLY PIN
Part
Number Description Pin Length

8667571 IDENTIFICATION 2 RINGS 66.37-66.67 mm (2.61"-2.62")
8667572 IDENTIFICATION 3 RINGS 66.74-68.04 mm (2.67"-2.68")
8667573 IDENTIFICATION WIDE BAND 69.11-69.41 mm (2.72"-2.73")