A/T - New Governor Screen Added to Case
89pontiac01Bulletin Number: 89-7-13
Reference Number: 877151
Publish Date: 1/89
Subject: NEW GOVERNOR SCREEN ADDED TO CASE
Models 1989 6000, BONNEVILLE AND GRAND PRIX EQUIPPED
Affected: WITH THM 440-T4/HYDRA-MATIC 4T60, F-7 (ME9)
BULLETIN COVERS:
A new Governor Screen (3) was added to the Governor Shaft Sleeve in the Case. The Governor Screen will minimize the potential of sediment entering the Governor Assembly and preventing the Governor Balls from seating properly.
FIGURE 2 - NEW GOVERNOR SCREEN:
SERVICE ACTION: (Figure 2)
A machining change in the Case to provide clearance for the Screen will not permit installation of the Screen in past model Cases.
Important: Do not attempt to drill previous design Cases in order to install a Governor Screen due to critical dimensions.
FIGURE 1 - THM 440-T4/THM F-7 TRANSAXLE IDENTIFICATION INFORMATION:
DATE OF PRODUCTION CHANGE: (Figure 1)
The new Governor Screen will be used on some models for production starting November 30, 1988 (Julian Date 335) and will be used on all models December 5, 1988 (Julian Date 340).
SERVICE NOTES:
This is the same Governor Screen as used in the THM 125C/HYDRA-MATIC 3T40.
SERVICE PARTS INFORMATION:
Part No. Description Model Year Model Usage
8660770 Sleeve and Screen 1989-1/2 All
Assembly, Governor Shaft
8631328 Sleeve, Governor Shaft 1984-89-1/2 All
(no screen)
Parts are currently available from GMSPO.