Service Procedure
A. 1989 and 1990 AC/AY-Body Passenger Cars1. Place an oil pan under the vehicle to catch fluid leakage (oil loss will be minimal).
2. Disconnect the existing cooler hoses from the fittings at the transmission and at the external oil cooler mounted at the front of the radiator. Save the clamps for reinstallation.
3. Install the supplied valve and hose assembly (PN C3940405) in place of the removed hoses as follows.
Note: The hoses on the new assembly are banded together with tape and the ends are pre-molded to align them for installation to the appropriate transmission and cooler fittings. Do not disturb the tape wrappings.
Figure 1:
Vehicles not equipped with Bendix Anti-Lock Brake System --
Install the supplied bracket on the valve (with the bracket mounting holes toward the front as shown in Figure 1). Loosely attach the bracket to the left front frame rail with the supplied screw, using the existing hole in the rail.
Figure 2:
Figure 3:
^ Vehicles equipped with Bendix Anti-Lock Brake System (ABS) --
There is an existing cooler line clip at the ABS controller module mounted to the left front frame rail (Figure 2). Use this existing clip to support the valve and hose assembly as shown in Figure 3.
Figure 4:
Figure 5:
^ All Vehicles -- Attach the hoses to the fittinqs at the external oil cooler (Figure 4) and at the transmission (Figure 5). Secure with the original clamps.
^ Tighten the valve support bracket screw (non ABS cars) or clip screw (Bendix ABS equipped cars).
^ Start the engine and check for leaks.
^ Check and, if necessary, adjust the transmission oil level.
Figure 2:
Figure 3:
B. 1990 AS-Body Mini Vans/Wagons With Heavy Duty Trailer Tow
1. Place an oil pan under the vehicle to catch fluid leakage (oil loss will be minimal).
2. Disconnect the existing cooler hoses from the fittings at the base of the radiator (Figure 2) and from the transmission fittings (Figure 3). Save the clamps for reinstallation.
3. Install the supplied valve, hose and bracket assembly (PN C3940406) in place of the removed hoses as follows.
Note: The hoses on the new assembly are banded together with tape and the ends are pre-molded to align them for installation to the appropriate transmission and cooler fittings. Do not disturb the tape wrappings.
Figure 1:
^ Support the valve and hose assembly by loosely attaching the valve support bracket to the left front frame rail with the supplied screw, using the existing hole in the rail (Figure 1).
Figure 2:
^ Attach the hoses to the fittings at the base of the radiator and secure with the original clamps (Figure 2).
Important: Note that bolh hoses do not attach to the lower radiator tank fittings. As shown in Figure 2, one hose attaches to the lower radiator tank fitting and the other hose attaches to the external cooler tube.
Figure 3:
^ ^ Attach the hoses to the transmission fittings and secure with the original clamps (Figure 3).
^ ^ Tighten the valve support bracket screw.
^ ^ Start engine and check for leaks.
^ ^ Check and, if necessary, adjust the transmission oil level.