Transmission, Installing: Procedure

WARNING: This page is about a different car, the 2025 Audi S3 and 2025 Audi A3 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Refer to the "Transmission, Removing" procedure for a list of the special tools needed. Refer to TRANSMISSION, REMOVING .
Replace bolts that were tightened with an additional turn after removing them.
Replace the self-locking nuts and bolts, gaskets, seals and O-rings after removal.
Secure all hose connections with hose clamps corresponding to series production. Refer to the Electronic Parts Information (ETKA).
During installation, all cable ties must be installed at the same location.

Install in the reverse order of removal while noting the following:

Tightening specifications. Refer to TRANSMISSION TIGHTENING SPECIFICATIONS .

-- Remove the screen -1- of the oil cooler carefully using a screwdriver and check for contamination.

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-- If necessary, clean the screen and clip it in again.

-- Replace the needle bearing -arrow- in the crankshaft. Refer to CRANKSHAFT NEEDLE BEARING, REPLACING .

Fig 1: Identifying Needle Bearing

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-- Grease the transmission pins (not the splines) lightly.

-- Check if the alignment sleeves -A- for centering the engine/transmission are in the cylinder block and insert them if they are not.

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The missing alignment sleeves due to an offset from the engine and transmission lead to damage to the needle bearing in the crankshaft.

-- Make sure the intermediate plate is seated correctly -arrows-.

Fig 2: Installing Intermediate Plate

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-- Carefully lift the transmission using the Engine and Gearbox Jack :VAS 6931 and bring it to its installation position using the Transmission Support :3282 .

-- Insert the transmission without pinching any lines.

Engine and transmission must be brought together by hand until both flanges contact all around!
If this is not the case, readjust the transmission support until the engine and transmission align.

-- Attach the transmission to the engine.

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For the bolts -1 and 2-, use the Insert Tool - 18mm :T10179 ; while doing so, note the changed tightening specification.
For the bolt -3- in the starter hole, use the Socket - XZN 14 :T10061 .
For the bolts -6 and 7-, use the Ring Wrench - 16mm :T10388 with the Torque Wrench, 6-50 Nm :V.A.G 1331A ; while doing so, note the changed tightening specification.

-- Remove the Transmission Support :3282 from the transmission.

-- Lift the engine/transmission assembly using the spindles on the Engine Support Bridge :10 - 222 A .

-- Align the engine/transmission assembly in its installation position. To do so, lift it until the transmission is completely flat on the transmission mount.

Tip

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Before installing the bolts -arrows- the transmission and transmission mount must be parallel to each other. If necessary, lift the transmission using the Engine and Gearbox Jack :VAS 6931 .

-- Install the bolts -arrows- but only tighten by hand.

-- Check the subframe mount adjustment. Adjust if necessary. Refer to ASSEMBLY MOUNT, ADJUSTING .

Remove Engine Support Bridge :10-222 A only when all subframe mount bolts are tightened to the specified torque and the subframe is installed.

-- Install the coolant pipe on the transmission. Refer to OVERVIEW - COOLANT PIPES .

-- Install the coolant hoses on the transmission fluid cooler.

CAUTION:

Risk of destroying due to electrostatic charge.

- Do not touch the connector terminals.

- Touch a grounded object (for example the hoist) and discharge any static electricity.

-- Attach the connector for the Dual-Clutch Transmission Mechatronic -J743- and turn the twist lock clockwise to lock it.

-- Connections and routing. Refer to the appropriate Wiring Diagram.

-- Install the selector lever cable. Refer to SHIFT MECHANISM, REMOVING AND INSTALLING .

-- Adjust the selector lever cable. Refer to SELECTOR LEVER CABLE, CHECKING AND ADJUSTING .

-- If the transmission is replaced or the bleeder line is removed from the transmission: remove the closure cap -arrow-.

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-- Attach the drive axles to the transmission. Refer to DRIVE AXLE, REMOVING AND INSTALLING .

-- Install the right drive axle heat shield. Refer to DRIVE AXLE HEAT SHIELD, REMOVING AND INSTALLING .

-- Vehicles with AWD: install the driveshaft at the bevel box. Refer to the appropriate service information .

-- Assemble the exhaust system and align it without tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .

-- Install the subframe. Refer to SUBFRAME WITHOUT STEERING GEAR, REMOVING AND INSTALLING .

-- Install the left front wheel housing liner. Refer to OVERVIEW - FRONT WHEEL HOUSING LINER .

-- Install the starter. Refer to STARTER, REMOVING AND INSTALLING .

-- Install the left air duct pipe. Refer to OVERVIEW - CHARGE AIR SYSTEM .

-- Install the battery tray. Refer to BATTERY TRAY, REMOVING AND INSTALLING .

-- Install the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

-- Check the coolant level. Refer to COOLANT, DRAINING AND FILLING .

If the transmission is replaced, the "Replace control module" function must be performed using the Vehicle diagnostic tester .

-- Select Individual test on the Vehicle diagnostic tester .

Diagnostic-capable systems
0002 - Transmission electronics
0002 - Transmission electronics functions
0002 - Mechatronic, replacing