New Input Sun Gear to Input Carrier Thrust Bearing Assembly

FIGURE 3 - NEW INPUT SUN/CARRIER BEARING ASSEMBLY:

SUBJECT: New Input sun Gear To Input Carrier Thrust Bearing Assembly

TRANSAXLE APPLICATIONS:

1989 THM 440-T4/HYDRA-MATIC 4T60 (ME9)

TRANSAXLE MODELS:

All 1989 THM 440-T4/HYDRA-MATIC 4T60 MODELS

BULLETIN COVERS:

A new Input Sun Gear to Input Carrier Thrust Bearing Assembly that has increased torque capacity for higher torque engines. The new input Sun/Carrier Bearing Assembly (661) is 0.38 mm (0.015") thicker and the Input carrier Assembly (662) Bearing Pocket is machined deeper to accommodate the increased thickness of the new Bearing (Figure 3).
SERVICE ACTION:

The new Input Carrier Assembly (662) will be available for service for all current and past models built after April 1, 1986 (Julian Date 091) (Wider Input Sprag Change).

FIGURE 1 - THM 440-T4 (HYDRA-MATIC 4T60)/THM F-7 TRANSAXLE IDENTIFICATION INFORMATION:

DATE OF PRODUCTION CHANGE: (Figure 1)

November 1, 1988 (Julian Date 306) all THM 440-T4/HYDRA-MATIC 4T60 transaxles are built with the new Input Sun/Carrier Bearing Assembly (661) and Input Carrier Assembly (662).
SERVICE PARTS INFORMATION:

Part No. Description Model Year/Model Usage

8668244 Carrier Assembly, Input Complete 1986-89/All
(new)

Parts are currently available from GMSPO.