AW50-42 Transmission
Transmission, installing
Special tools:
951 2050 BEVEL PROTRACTOR 951 2050 Bevel Protractor
Checking before installing
Check that the transmission and engine mating surfaces areabsolutelyclean.
Also check that the guide sleeves towards the engine are in position and are free of faults.
Lubricate the holes in the transmission (for the guide pins). Use a little grease.
Adjust the position of the engine / transmission
Adjust height and angle with the mobile jack and the transmission fixture.
Locate the transmission on the engine.
Ensure that the transmission goes in straight in relation to the engine.
Note! If necessary: Turn the engine so that the stator shaft is correctly aligned in the torque converter.
Install and tighten the screws for the transmission
Install all 7 screws for the transmission / engine.
First tighten alternately and crosswise to light contact.
At the same time, check that the whole of the transmission is in contact with the engine.
Then tighten the screws crosswise. Tighten the screws for the transmission and engine. Tighten to 50 Nm. Tighten the screws for the starter motor. Tighten to 40 Nm.
Remove the fixture from the transmission.
Install the torque converter screws
Note! Use new screws, Torx TX50.
Align the torque converter against the carrier plate. Do this by turning the engine with the nut for the crankshaft pulley and turning the torque converter.
Install all 6 screws loosely. Tighten the screws until the heads are in contact with the carrier plate. Then tighten to 35 Nm. Use Torx socket TX50
Note! Remove the socket wrench from the crankshaft.
Install the collision protection system over the steering gear (right-hand drive cars)
Install both the screw and the nut. Tighten to 80 Nm.
Install the sub-frame components
Install:
- the bump stop on the sub-frame. Install the rubber plug on the transmission
- the screw and the nut for clamp for the cable harness on the transmission.
Lower the car
Lift up the engine and transmission to the horizontal position
Note! Right-hand drive cars: Before lifting the engine, check that the lower steering column has not slipped over the upper steering column at the pedal box.
Raise the car
Install the rear engine mounting
Install:
- the rear engine mounting on the transmission
- the engine mounting screws. Tighten to 50 Nm.
Install the sub-frame on the bodywork
Note! Use 4 new M14 screws. Lubricate the screw threads.
Note! When the sub-frame is raised, ensure that the screws for the steering gear locate in the frame. Remove the hook / straps. RHD cars: Also align the collision protection system which is positioned between the steering gear and frame.
Begin the installation of the subframe on the right-hand side.
Use the mobile jack to lift the frame toward the bodywork until the frame is approximately 10 cm from the bodywork.
Install the left drive shaft on the transmission, the wheel spindle and the control arm
Note! Take care not to damage the drive shaft seal in the transmission.
Press in the drive shaft so that the snap ring locates in the groove. Pull the constant velocity joint to check that the drive shaft is secure.
Locate the drive shaft in the wheel hub. Install the screw loosely in the drive shaft.
Install the wheel spindle on the control arm.
Install the lock nut loosely.
Raise the frame to the bodywork. Install the frame screws. Move the mobile jack to the right-hand side.
Install the right drive shaft in the transmission, the wheel spindle and the control arm
Note! Take care not to damage the drive shaft seal in the transmission.
Install the drive shaft pilot bearing cover
Tighten with 25 Nm.
Locate the drive shaft in the wheel hub. Install the screw loosely in the drive shaft.
Install:
- the mobile jack under the sub-frame. Remove both the sub-frame screws. Lower the sub-frame approximately 10 cm
- the wheel spindle on the control arm
- the lock nut loosely.
Lift the sub-frame to the bodywork. Install the new screws for the sub-frame.
Press the evaporator cable and the oil pipe into place in the sub-frame clips.
Install and tighten the sub-frame screws
Install the screws for the support bracket.
First tighten the screws on the left-hand side of the subframe, followed by the right, to 105 Nm + 120°. Use a bevel protractor 951 2050 BEVEL PROTRACTOR 951 2050 Bevel Protractor.
Then tighten the screws on the subframe brackets. Tighten to 50 Nm.
Cars with parking heaters:
Install the parking heater in the bracket. Tighten the nuts. Tighten to 25 Nm.
Install the oil pipe on the transmission
Tighten the oil pipe to the transmission.
Install and tighten the suspension components (both sides)
Install the nut for the tie rod. Use a new nut. Tighten to 70 Nm.
Tighten the drive shaft screw. Use a new screw. Counterhold using a crow bar in the brake disc. Tighten to 35 Nm + 90°. Use bevel protractor 951 2050 BEVEL PROTRACTOR 951 2050 Bevel Protractor.
Install the nut for the anti-roll bar link at the spring strut. Use a new lock nut.
Note! Counterhold the ball joint pinion when tightening the anti-roll bar link so that the ball joint boot cannot turn. Tighten to 50 Nm.
Tighten the ball joint pinion
Note! Counterhold the ball joint pinion while tightening so that the ball joint boot cannot turn. Tighten. See: Tightening torque Tightening Torque.
Install new lock nuts on the steering gear
Tighten the screws. Tighten to 50 Nm.
Tighten the screw for the rear engine pad
Lift the anti-roll bar a few mm. Use a jimmy bar. This makes it easier to insert the tool for the screw.
Tighten to 50 Nm.
Reinstall the exhaust pipe
Install:
- the rear exhaust mounting on the cross member
- the nuts for the exhaust mounting. Tighten to 25 Nm.
Install the exhaust pipe on the turbocharger (TC)
Install:
- the exhaust pipe on the turbocharger (TC). Use new nuts. Tighten to 25 Nm
- the screw for the heat deflector. Tighten to 25 Nm.
Install the screws for the bracket for the heated oxygen sensor (HO2S) cable
Install:
- the screws for the bracket
- the connectors in the sub-frame.
Reinstall the front cross member
Install:
- the cross member and the brake pipe in their holders
- the screws for the exhaust bracket
- the screws for the cross member. Tighten to 25 Nm.
Install the screw for the front engine pad and the torque rod mounting in the sub-frame
Install:
- the screw for the front engine pad. Tighten to 50 Nm
- the torque rod mounting on the transmission.
Note! Use new screws for the mounting. Tighten to 50 Nm.
Install the screw for the ground lead and the cable conduit
Note! Cars with parking heater: Install the heater in the bracket. Tighten the nuts to 25 Nm.
Install:
- the screw for the ground lead bracket in the sub-frame. Tighten to 10 Nm
- the screw in the cable conduit
- the front splash guard
- the splash guard under the engine
- the nuts for the left fender liner.
Rivet the fender liner into place.
Install the wheels. See Installing wheels Service and Repair.
Lower the car. Remove the lifting beam from the engine
Install the remaining screws for the transmission and starter motor
Install:
- the three screws for the transmission / engine. Tighten to 50 Nm
- the screws for the starter motor. Tighten to 40 Nm
- the screw for the ignition setting sender. Tighten to 10 Nm.
Install the dip stick pipe and the ground lead on the transmission
Install the screw with the ground lead and the dip stick pipe in the transmission.
Use a new rubber seal. Apply petroleum jelly to the rubber seal. Tighten to 25 Nm.
Note! Carefully check that the rubber seal is correctly positioned in the transmission. Failure to do so may result in leakage.
Install the transmission cable on the transmission and the lever
Install:
- the large connector. Lock it into place
- the two cable conduit nuts. Tighten to 10 Nm
- the connector furthest in at the cable conduit (furthest up to the left).
Install the charge air pipe on the charge air cooler (CAC). Connect the upper oil hose to the oil cooler
Install the air cleaner (ACL) and the upper torque rod in the engine compartment
Install:
- the torque rod and the screw. Install the clamp for the oil hose on the right hand side. See Brake fluid reservoir, replacing, L.H.D Brake Fluid Reservoir, Replacing, L.H.D
- the air cleaner (ACL) housing. See Brake pipe master cylinder / ABS unit, replacing Brake Pipe Master Cylinder / ABS Unit, Replacing.
Finishing work
Check the transmission oil level
Note! Oil grade: Only automatic transmission fluid (ATF). Dexron III (the fluid must have a G license)*. *This is usually given as "Dexron III (G-xxxxx)" where xxxxx is a 5 digit serial number. "Dexron III-G" (without a number) may also occur. Dexron II D and II E must not be used.
Use a funnel with a plastic hose. Fill through the dipstick pipe.
Measure the amount of oil that was drained. Fill with the same amount of new oil.
Start the engine. Move the gear selector through all the gear positions. Position the selector in position P and allow the transmission to reach operating temperature (80°C).
Check the level.
Test drive the car
Use the test driving schedule, Test Drive Schedule, Description.
Note! After replacing the transmission, the transmission adaptation and the "Transmission oil change" counters must be reset. See Resetting the adaptation, AW55-50/51SN, AW50/51 AWD, 4T65EV-GT Resetting Adaptation.