Harsh 3-2 Shift - At Low Altitude

- 1986 Vehicles with 2.8L, 3.0L and 3.8L Engines
- 1987 Vehicles with 3.8L Engines
- 1988 Vehicles with 3.8L Engines
- 1989-90 All with 440T4

Figure 8 - Designated High Altitude Counties*:

* Areas other than the Designated High Altitude Counties listed in Figure 8

Figure 5 - 3-2 Control Valve Line Up:

SERVICE PROCEDURE

A harsh 3-2 shift at low altitude in a 1986 through 1990 model may be corrected by installing appropriate service package (package 8675936 contains more components) that contains:

(1) 3-2 Control Valve Spring (Item # 341, Figure 5)
(2) Spacer Plate Gaskets
(1) Instruction Sheet


IMPORTANT: Service Replacement Transaxle Assemblies (S.R.T.A.) are built with original calibrations and may need to be updated with service 3-2 control valve springs per customer requirements.

Figure 1 - Transaxle Identification Information:

SERVICE PARTS INFORMATION
SERVICE MANUAL REFERENCE

Refer to the THM 440T4/Hydra-Matic 4T60 (ME9) Automatic Transaxle Unit Repair Table of Contents for Control Valve Assembly information.

SERVICE NOTES

When servicing a transaxle for this condition, also ensure that the 3-2 control valve and 1-2 servo control valve move freely in their bores.