Fault Tracing Schedule
Automatic transmission, shudder during upshiftChecking and fault tracing
Contents 1
NOTE:
Read through the entire fault-tracing schedule before beginning work.
Fault-tracing consists of
- driving
- fault-tracing
- corrective action after driving and fault-tracing.
Driving 2
NOTE:
Always observe posted speed limits.
In order to feel the upshift shudder, the transmission oil typically needs to reach 80-90 degrees C (176-194 F).
Start the car with gear selector in D position. Accelerate with an even throttle opening. If there is a shudder condition that can be felt as a brief vibration, it is most often noticeable during the upshift between 2nd and 3rd gear.
Test with different throttle openings to ensure that the shudder comes from the transmission during the shift. Upshift from 2nd to 3rd gear occurs between 40-140 km/h (25-86 mph).
If the above conditions are met, continue with the fault-tracing as follows.
Fault-tracing 3
Faults which occur in the transmission but do not store any diagnostic trouble codes (DTC) can be mechanically fault traced by carrying out certain checks and adjustments.
Fault-trace in the following order.
Check the transmission fluid
Check the color. The color must be red or reddish brown. The color must not be pink or cloudy. (Pink and/or cloudy oil means that coolant has entered into the transmission).
Check the expansion tank
Check that there is no transmission fluid in the radiator expansion tank (do not confuse it with black engine Oil).
Corrective action
The following corrective action must be taken if coolant has entered the transmission:
Replace the transmission assembly. See the method below, Replacing the transmission.
Replace the radiator including the extra cooler, if installed, and the hoses for the transmission.
Clean the expansion tank. Check and replace the expansion tank if necessary.
Corrective action after test driving and fault-tracing 4
The following work must be carried out if there are no faults with the oil and no other faults are found.
Replace the STH solenoid in the transmission (see the method below, replacing the solenoid).
Fill the transmission with oil. Ensure that the oil level is correct. See checking and adjusting the oil level in the transmission in VADIS.
Test drive the car again (see test driving).
NOTE:
In order to let the TCM adapt to correct shift pressures, it is necessary to repeat the same shift 5-10 times.
If the problem persists: Replace the transmission assembly. see the method below, Replacing the transmission.
Replacing solenoid 5
Removing the transmission side cover
NOTE!
The method is updated. The three-way catalytic converter (TWC) need not be removed.
NOTE:
The stages that are not changed are numbered according to the complete method in VADIS.
Stages 1-18 in VADIS side cover, transmission, removing, are not changed. See VADIS, side cover, transmission, removing for method.
Removing the front cross member 6
Drill out the pop rivets for the heat deflector
Remove
- the screws by the front cross member (x 4)
- the screws for the exhaust pipe mounting in the front cross member
- the brake pipe from its holder in the member
Removing the bracket for the heated oxygen sensor (HO2S) wiring 7
Remove the screws for the bracket in the sub-frame holding the heated oxygen sensor (HO2S) cable.
Push the bracket out of the way.
Removing the center and rear cross members. 8
Remove the cross member screws.
NOTE: 9
The stages that are not changed are numbered according to the complete method in VADIS.
Stages 22-35 VADIS side cover, transmission, removing, are not changed. See VADIS, side cover, transmission, removing for method.
Removing the line pressure solenoid 10
Remove:
- the connector
- the spring clamp. Pull it straight out. Use a small screwdriver to bend the clamp out a little.
- the solenoid from the control system. Use a screwdriver. Insert it between the solenoid and the control system. Carefully bend and pull on the solenoid at the same time. Check that the O-rings remain on the solenoid.
Installing solenoid 11
Apply a little petroleum jelly to the sensor O-rings. Install the solenoid.
NOTE:
The little guide lug on the solenoid should be upwards on installation.
Turn and press in the solenoid so that it bottoms against the control system.
Install:
- the spring clamp. Check that the spring damp is locked.
- the connector.
Installing the transmission side cover 12
NOTE:
The stages that are not changed are numbered according to the complete method in VADIS.
Stages 1-12 VADIS side cover, transmission installing are not changed. See VADIS, side cover, transmission removing for method.
Installing the front cross member 13
Install
- the screws for the exhaust pipe mounting. Tighten to 10 Nm ( 7.4 lb ft)
- the brake pipe in its holders
- the screws for the cross member Tighten to 25 Nm (18 lb ft).
Secure the heat deflector using the rivets (carried out earlier).
Installing the center and rear cross members 14
Install the screws. Tighten to 25 Nm (18 lb ft).
Note! 15
The stages that are not changed are numbered according to the complete method in VADIS.
Stages 15-29 VADIS side cover, transmission, installing, are not changed. See VADIS, side cover, transmission, removing for method.
Checking the steering gear bearing in the boot at the firewall 16
Check that the steering gear bearing in the boot has not detached from the boot.
If it has become detached apply a little grease to the edge of the boot (around the hole). Press the bearing back down into the boot.
Note!
Check that the rubber boot is positioned correctly in the bodywork. Adjust if necessary. There is a risk that noise from the transmission or engine and road noise may enter the passenger compartment.
Test driving the car 17
Stages 31 in VADIS side cover, transmission, installing, (test driving the car) are changed. See test driving above, in this Service Bulletin (stage 2).
Replacing the transmission 18
Removal
Note!
The method is updated. The three-way catalytic converter (TWC) need not be removed.
Note!
The stages that are not changed are numbered according to the complete method in VADIS.
Stages 1-26 VADIS transmission, removing, are not changed. See VADIS, transmission, removing for method.
Removing the center and rear cross members. 19
Remove the cross member screws.
NOTE: 20
The stages that are not changed are numbered to the complete method in VADIS.
Stages 28-41 VADIS transmission, removing, are not changed. See VADIS, transmission, removing for method.
Installation 21
NOTE:
The stages that are not changed are numbered according to the complete method in VADIS.
Stages 1-18 VADIS transmission, installing, are not changed. See VADIS, transmission, installing for method.
Installing the center and rear cross members 22
Install the screws. Tighten to 25 Nm (18 lb ft).
Note! 23
The stages that are not changed are numbered according to the complete method in VADIS.
Stages 20-40 VADIS transmission, installing, are not changed. See VADIS, transmission, installing for method.