Harsh 3-2 Shift Maneuver At 17-20 MPH
1985-1/2 - 1986 44OT4A 3-2 shift maneuver is obtained by allowing the vehicle to coastdown to 17-20 mph (with closed or zero throttle) and then stepping into the throttle to obtain a 3-2 shift.
Figure 6 - Pump And Control Valve Assemblies:
SERVICE PROCEDURE
At start of production (SOP) 1987, an orifice pipe was added between the 1-2 servo release cover plate and the 3-2 coastdown valve to allow a smoother second gear apply (Figure 6). The four new parts installed as a set will service certain past model transaxles with a harsh 3-2 shift maneuver condition.
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 appropriate service information.
SERVICE NOTES
If the new pump body assembly has a "one terminal" 3rd clutch switch, remove it and replace with the "two terminal" 3rd clutch switch from the original pump body assembly.
Figure 8 - Designated High Altitude Counties*:
When servicing a transaxle for the above described condition indesignated high altitude areas (Figure 8), also install the 3-2 control valve spring package described in Section II of this bulletin. Also ensure that the 3-2 control valve and 1-2 servo control valve move freely in their bores.