Removing and installing mechatronic unit for dual clutch gearbox -

J743-
Special tools and workshop equipment required

Used oil collection and extraction unit -V.A.G 1782-

Removing

 Gearbox in vehicle

Caution
Risk of damage to gearbox

The engine must not be started when there is no more ATF in the gearbox and the
mechatronic unit for dual clutch gearbox -J743- has been removed.

Note

→ Chapter „Repair instructions“.

→ Chapter „Rules for cleanliness when working on the dual clutch gearbox“.

Notes on dual clutch gearbox 0B5 → Chapter.

– Shift selector lever into position „P“.

– Switch off ignition and take out ignition key.

 Caution
The gearbox control unit (mechatronic unit) can be damaged by electrostatic discharge.

Before handling the electrical connector, the mechanic must discharge static by
briefly touching an earthed metal object, such as vehicle earth, lifting platform or
heater radiator, etc.

Do not touch contact pins in gearbox connector with bare hands.

– Turn fastener anti-clockwise -arrow- and unplug electrical connector on gearbox.

– Remove bolt -1-.

– Turn connector housing -2- anti-clockwise -arrow- and detach.

– Remove bolts -arrows- and pull connecting piece for ATF lines out slightly.

Note
Illustration shows connecting piece with ATF lines removed.

– Remove ATF oil pan → Chapter.

– Place used oil collection and extraction unit -V.A.G 1782- below gearbox.

– Carefully pull ATF filter off mechatronic unit towards rear in direction of -arrow-.
 Caution
The gearbox control unit (mechatronic unit) can be damaged by electrostatic discharge.

Before handling the electrical connector, the mechanic must discharge static by
briefly touching an earthed metal object, such as vehicle earth, lifting platform or
heater radiator, etc.

Do not touch contact pins in gearbox connector with bare hands.

– Unplug electrical connector (to do so, pull retainer -arrow 1- and press down release catch -
arrow 2-).
– Remove bolts -1 … 6-.

Caution
Risk of damage to mechatronic unit.

Loosen only the bolts marked -1 ... 6-.

If other bolts are loosened, this may affect the operation of the mechatronic unit or
the mechatronic unit could come apart.

Note

Ensure that the sealing surface is not damaged.

The mechatronic unit may be tightly seated.

If it is necessary to lever off the mechatronic unit, get help from a second person to ensure that
the mechatronic unit does not drop out. Alternatively, screw bolts -1- and -2- in again slightly to
catch mechatronic unit when levering it out.

– Detach mechatronic unit.

Caution
Risk of damage to senders on rear side of mechatronic unit.

When setting down the mechatronic unit, the side with the bolt heads must be facing
downwards.
Installing

 Tightening torques → Chapter „Exploded view - mechatronic unit for dual clutch gearbox -
J743-“

Note

Renew O-rings and bolts for mechatronic unit.

Do not bend retainer for ATF pipes.

– Remove bolt -arrow-.

– Detach ATF pipes -1- and -2-.

– Detach ATF pipes -3 … 5-.

– Renew O-rings and re-install ATF pipes.

– Tighten bolt -arrow-.

Note
Make sure that all selector forks and gear actuators are in »centre position« before installing
mechatronic unit for dual clutch gearbox -J743-.
Adjusting selector forks:

– First check each of the selector forks -1 … 4- by hand.

Each selector fork has 3 positions:

Gear engaged -G-

Neutral -N- (centre position)

Gear engaged -G-

– Move the 4 selector forks once into each position -arrows-, one after the other.

– Then shift all selector forks back into »centre position«-N-.

Adjusting gear actuators:

Caution
The gearbox control unit (mechatronic unit) can be damaged by electrostatic discharge.

Before handling the electrical connector, the mechanic must discharge static by
briefly touching an earthed metal object, such as vehicle earth, lifting platform or
heater radiator, etc.

Do not touch contact pins in gearbox connector with bare hands.

Do not apply any pressure to the sensors when levering out the plungers.

The gear actuators have to be adjusted differently according to the production date of the
mechatronic unit.

The production date can only be read off from the identification on the mechatronic unit -arrow-.

The identification on the mechatronic unit comprises the following information:

Identification of
mechatronic unit
Explanation: in this example „L31B1138“
L 31 B1 138
 L Year of manufacture:
L = 2010
K = 2009
J = 2008
... etc.

31 Calendar week of year of manufacture

B1 Manufacturer's code for day and shift no.

Monday: shift 1 = A1, shift 2 = B1, shift 3 = C1
Tuesday: shift 1 = D1, shift 2 = E1, shift 3 = F1
Wednesday: shift 1 = G1, shift 2 = H1, shift 3 = I1
... etc.

138 Serial number of unit per shift and day, in this case the 138th
mechatronic unit in shift B1

From serial number „L31B1138“ onwards, the gear actuators in the mechatronic unit must be
adjusted to a different value.

Note

A mechatronic unit with the identification e.g. „L31A1140“ was manufactured before a unit with
the identification „L31B1138“ since it was made in the 1st shift (A1) on Monday.

Similarly, a mechatronic unit with the identification „L31C1009“ was manufactured after a unit
with the identification „L31B1138“ since it was made in the 3rd shift (C1) on Monday.
– Adjust the four gear actuators on rear side of mechatronic unit to dimension -a- (in »centre
position«) by carefully pulling or pushing each gear actuator outwards or inwards.

Mechatronic units with identification up to „L31B1137“:

 Dimension -a- = 28 mm

Mechatronic units with identification from „L31B1138“ onwards:

 Dimension -a- = 32 mm
– Align coupling lugs -arrows- of gear actuators so that they engage in eyes of selector forks
when installing.
– Insert mechatronic unit into gearbox housing.

 Dowel pins of mechatronic unit should fit easily into holes on gearbox.
 If mechatronic unit cannot be installed easily, a selector fork or gear actuator may be out of
centre position. Check centre positions and re-adjust if necessary.
After inserting mechatronic unit:

– Check all gear actuators through opening between mechatronic unit and gearbox housing
using an electric hand torch or similar.

 All four coupling lugs of gear actuators must engage in corresponding eyes of selector forks.

– Tighten bolts for mechatronic unit → Fig..

Further assembly is carried out in reverse sequence; note the following:

Caution
The gearbox control unit (mechatronic unit) can be damaged by electrostatic discharge.

Before handling the electrical connector, the mechanic must discharge static by
briefly touching an earthed metal object, such as vehicle earth, lifting platform or
heater radiator, etc.

Do not touch contact pins in gearbox connector with bare hands.

– Make sure that electrical connector on mechatronic unit is properly engaged and secured.

– Observe measures required after connecting battery → Electrical system; Rep. gr.27.

– Install ATF filter → Chapter.

– Install ATF oil pan → Chapter.

– Fill up with ATF → Chapter.

 After renewing mechatronic unit for dual clutch gearbox -J743-, run appropriate „Guided
Function“ on vehicle diagnostic tester → Chapter
Removing and installing centre differential housing with gearbox
installed - bolted propshaft
Special tools and workshop equipment required

Engine and gearbox jack -V.A.G 1383 A-


Used oil collection and extraction unit -V.A.G 1782-

Counterhold tool -T10172- with -T10172/5-

Gearbox support -T10337-

For sealant, refer to → Electronic parts catalogue
Removing

– Remove rear noise insulation -2- → General body repairs, exterior; Rep. gr.66.
Vehicles with single exhaust system:

Caution
The flexible joint in the front exhaust pipe can be damaged.

The flexible joint in the front exhaust pipe must not be bent further than 10°.

– Unscrew bolts -arrows-, push clamp towards rear and tie up front exhaust pipe to body.
Vehicles with twin exhaust system:

Caution
The flexible joint in the front silencer can be damaged.

The flexible joint in the front silencer must not be bent further than 10°.

– Unbolt clamps -1- and -2-, push clamps towards rear and tie up front silencers to body.
A5 Cabriolet/Sportback:

– Remove diagonal struts (left and right) → Running gear, front-wheel drive and four-wheel
drive; Rep. gr.42.
Continued for all vehicles:

– Remove subframe cross brace → Running gear, front-wheel drive and four-wheel drive; Rep.
gr.40.

Caution
Risk of damage to parts of the running gear.

Do not let the vehicle down on the wheels if the gearbox mounting, steering box and
subframe cross brace are not properly installed.
– If fitted, remove bolts -arrows- and detach heat shield -1- for propshaft.
– Remove bolts from connection between propshaft and gearbox (counterhold using counter-
hold tool -T10172- with -T10172/5-).

– Slide propshaft together towards rear final drive. The constant velocity joints can be moved
axially.

– Tie propshaft up to underbody.

– Set up gearbox support -T10337- on engine and gearbox jack -V.A.G 1383 A- and position
underneath gearbox mounting.

– Slightly lift gearbox with engine and gearbox jack -V.A.G 1383 A-.

WARNING
Risk of accident.

Engine and gearbox jack -V.A.G 1383 A- must remain in position when work is being
carried out and must not be left unattended.
– Remove bolts -arrows- for tunnel cross member.
– Lower gearbox by dimension -a- using engine and gearbox jack -V.A.G 1383 A-.

 Dimension -a- = 100 mm (maximum)

– Unscrew nuts -arrows- and remove tunnel cross member.
– Place used oil collection and extraction unit -V.A.G 1782- below gearbox.

– Remove bolts -1 … 4- and carefully detach centre differential housing; gear oil (MTF) will drain
off.

Caution
Risk of damage to the centre differential.

Pull the centre differential housing slowly and carefully towards the rear off the
gearbox. The centre differential may otherwise fall out of the gearbox.

A centre differential which has fallen to the ground can no longer be installed.
If bearing plate -1- remains behind in centre differential housing, proceed as follows:

Caution
Risk of damage to the sealing surface of the centre differential housing.

Carefully tap the housing in several places with a hammer.

– Grip one of the side ribs on bearing plate -1- with pliers and pull off in direction of -arrow A-.

– While doing so, carefully tap alternate sides of housing -arrows B- with a rubber-headed
hammer.

Installing

Installation is carried out in reverse sequence; note the following:

 Tightening torques → Chapter „Exploded view - centre differential housing - bolted propshaft“

Note
Renew the bolts for the centre differential housing.

– Thoroughly clean both housing joint surfaces; they must be free from oil and grease.
– Apply bead of sealant -arrow 1- evenly and not too thick on housing joint surface; for sealant
refer to → Electronic parts catalogue.

– To avoid contact corrosion, apply a ring of sealant around each bolt hole -arrow 2-.

– Lightly lubricate fitting surfaces for bearing plate with gear oil (MTF).
– Check that spacer sleeve -2- and shim -1- are fitted on output shaft.
– Lightly lubricate surfaces of both races on outside of bearing plate with a small quantity of gear
oil (MTF).

– Insert bearing plate.

 Installation position: shoulder of bearing plate -arrow A- must engage in recess on gearbox
housing -arrow B-.
– Fit centre differential -2- onto gearbox -1-.

– Insert spring -3- in centre differential.

– Apply a small quantity of grease to dished spring -5- and shim(s) -4- and secure in place in
centre differential housing -6-.

 Installation position of dished spring: convex side (which curves outwards) faces rear flange
shaft.
– Press centre differential housing fully onto gearbox housing, keeping it centred, and hold in
place.

– Tighten bolts for centre differential housing → Fig..

– Install tunnel cross member and tighten → Chapter.

Note
Please refer to the vehicle data sticker or the identification on the rear final drive to find out which
type of rear final drive is installed in the vehicle. Then select the appropriate Workshop Manual for
the rear final drive.

– Bolt propshaft onto gearbox → Rear final drive 0BC; Rep. gr.39 or → Rear final drive 0BF and
0BE - sport differential; Rep. gr.39.

– → Chapter „Filling up gear oil (MTF)“.

– Install exhaust system so it is free of stress → Engine, mechanics; Rep. gr.26.

– Install subframe cross brace → Running gear, front-wheel drive and four-wheel drive; Rep.
gr.40.
– Install diagonal struts → Running gear, front-wheel drive and four-wheel drive; Rep. gr.42.

– Install noise insulation → General body repairs, exterior; Rep. gr.66.

Checking gear oil level (MTF) and topping up

Special tools and workshop equipment required

Used oil collection and extraction unit -V.A.G 1782-

Engine and gearbox jack -V.A.G 1383 A-

Gearbox support -T10337-

Hand pump for gear oil -VAS 6617-

Safety goggles
Procedure

Note

→ Chapter „Repair instructions“.

→ Chapter „Rules for cleanliness when working on the dual clutch gearbox“.

Always use the correct fluid for the different parts of the gearbox: gear oil (MTF) system and
ATF system.

 Gear oil about 20 °C (room temperature).

 Vehicle must be absolutely horizontal (drive it onto a four pillar lifting platform or over an
inspection pit).
 The hand pump for gear oil -VAS 6617- must be clean; flush out with gear oil (MTF) if
necessary. The oil must not be mixed with other lubricants.
 The vehicle must be stationary with the engine switched off for at least 15 minutes to allow the
oil level to stabilise.

– Remove rear noise insulation -2- → General body repairs, exterior; Rep. gr.66.
Vehicles with in-line ATF filter -arrow- at rear left of gearbox:
– Set up gearbox support -T10337- on engine and gearbox jack -V.A.G 1383 A- and position
underneath gearbox.

– Raise gearbox slightly.

Note
If the tunnel cross member is being removed in order to check or top up the gear oil level (MTF),
the gearbox must be brought back to the normal position after the tunnel cross member is
removed. Only then can the gear oil level be topped up correctly.

– Remove tunnel cross member → Chapter.

– Remove bolts -2- and press in-line ATF filter to side.

Note

Items marked -1- and -arrow- can be disregarded.

The in-line ATF filter must be pressed to the side for access to the filler and inspection plug for
gear oil (MTF).

Vehicles not equipped with in-line ATF filter at rear left of gearbox:

Note

On vehicles not equipped with an in-line ATF filter at the rear left of the gearbox the tunnel
cross member does not have to be removed.

A cloth should be placed on the tunnel cross member to prevent gear oil (MTF) from running
into the casting pockets on the tunnel cross member.

– Place suitable cloth on tunnel cross member.

All vehicles:

– Place used oil collection and extraction unit -V.A.G 1782- below gearbox.

WARNING
Risk of eye injury.

Wear safety goggles.

– Unscrew filler and inspection plug -arrow- at side of gearbox housing.

 Gear oil level (MTF) must be up to bottom lip of filler and inspection hole.

If gear oil level (MTF) is not up to bottom lip of filler and inspection hole:

– Using hand pump for gear oil -VAS 6617-, fill up slowly with gear oil (MTF) until oil comes out
at filler and inspection hole.

 Gear oil (MTF) specifications → Electronic parts catalogue

– Repeat the procedure in several steps by adding gear oil (MTF) every 15 seconds until the
gearbox will not take any more oil.

Note
Make sure to wait the required amount of time so that the various oil chambers in the gearbox are
filled evenly.

– Tighten plug.

 Tightening torque → Chapter „Exploded view - drain and inspection plugs for gear oil (MTF) in
gearbox“

The remaining installation steps are carried out in reverse sequence; note the following:
Vehicles with in-line ATF filter -arrow- at rear left of gearbox:

– Screw in bolts -2-.

 Tightening torques → Chapter „ATF cooler, ATF lines and ATF filter“

– Install tunnel cross member → Chapter.

Vehicles not equipped with in-line ATF filter at rear left of gearbox:

Note

On vehicles not equipped with an in-line ATF filter at the rear left of the gearbox the tunnel
cross member must be cleaned.

Any gear oil (MTF) which has run into the casting pockets on the tunnel cross member must be
removed completely.

– Remove cloth on tunnel cross member.

– Clean tunnel cross member and remove any remaining gear oil.

Renewing mounting bracket and ball bearing for flange shaft (left-side)
Special tools and workshop equipment required

Thrust plate -VW 401-

Thrust plate -VW 402-

Press tool -VW 412-

Tube -VW 516-
– Remove flange shaft (left-side) → Chapter.

– Remove circlip -1- from flange shaft.

– Press ball bearing -A- off flange shaft.
– Fit new mounting bracket -1-.

 Installation position: side with lettering faces towards flange for drive shaft.

– Fit new ball bearing -2-.

– With mounting bracket -B- installed, press on ball bearing -A- as far as stop.
– Fit circlip -1- in annular groove on flange shaft.

Exploded view - centre differential housing - propshaft with

splines on gearbox end
Overview:

→ Chapter „Removing and installing centre differential housing with gearbox installed -
propshaft with splines on gearbox end“

→ Chapter „Removing and installing rear splined shaft, oil seal and ball bearing for rear splined
shaft“

→ Chapter „Renewing oil seal for rear splined shaft - vehicles without vibration damper“

→ Chapter „Renewing oil seal for rear splined shaft - vehicles with vibration damper“

→ Chapter „Pressing vibration damper onto rear splined shaft“

Note

→ Chapter „Repair instructions“.

→ Chapter „Rules for cleanliness when working on the dual clutch gearbox“.

The centre differential housing can also be removed and installed with the gearbox installed
in the vehicle → Chapter.
1 - Bolt
 Renew
 20 Nm +90°

2 - Bolt
 Aluminium bolts
 11x
 Renew
 Tightening torque and sequence → Fig.

3 - Housing
 For centre differential
 → Chapter „Removing and installing centre differential housing with gearbox installed - propshaft with splines on gearbox end“

4 - Bearing plate
 Installation position: shoulder must engage in recess in gearbox housing

5 - Centre differential

6 - Spring

7 - Assembly sleeve
 Does not have to be re-installed

8 - Circlip
 For ball bearing for rear splined shaft
 Removing and installing → Chapter „Removing and installing rear splined shaft, oil seal and ball bearing for rear splined shaft“

9 - Circlip
 For rear splined shaft
  Removing and installing → Chapter „Removing and installing rear splined shaft, oil seal and ball bearing for rear splined shaft“

10 - Ball bearing
 For rear splined shaft
 → Chapter „Removing and installing rear splined shaft, oil seal and ball bearing for rear splined shaft“

11 - Bolt
 Steel bolts
 2x
 Renew
 Tightening torque and sequence → Fig.

12 - Damper weight
 Depending on version

13 - Oil seal
 Renewing on vehicles with vibration damper → Chapter
 Renewing on vehicles without vibration damper → Chapter

14 - Dust ring
 Renew if removed

15 - Rear splined shaft

 Without vibration damper
 For correct version, refer to → Electronic parts catalogue
 Pressing out and pressing in → Chapter „Removing and installing rear splined shaft, oil seal and ball bearing for rear splined shaft“

16 - Rear splined shaft

 With vibration damper
 For correct version, refer to → Electronic parts catalogue
  Pressing out and pressing in → Chapter „Removing and installing rear flange shaft, oil seal and ball bearing for rear flange shaft“
 → Chapter „Pressing vibration damper onto rear splined shaft“

Tightening torque and sequence for centre differential housing

– Tighten bolts in 8 stages as follows:

Stage Bolts Tightening torque/tightening angle

1. Aluminium bolts -1- 8 Nm

2. Aluminium bolts -2- Screw in bolts by hand until they make contact

3. Aluminium bolts -1- Slacken bolts again and screw in by hand until they make contact
4. Aluminium bolts -3- Screw in bolts by hand until they make contact

5. Steel bolts -4- Screw in bolts by hand until they make contact

6. -1, 2, 3, 4- 10 Nm in diagonal sequence

7. Steel bolts -4- 15 Nm

8. -1, 2, 3, 4- Turn 90° further in diagonal sequence

Removing and installing centre differential housing with gearbox

installed - propshaft with splines on gearbox end
Special tools and workshop equipment required

Engine and gearbox jack -V.A.G 1383 A-

Used oil collection and extraction unit -V.A.G 1782-

Gearbox support -T10337-

For sealant, refer to → Electronic parts catalogue

Removing

Note
Please refer to the vehicle data sticker or the identification on the rear final drive to find out which
type of rear final drive is installed in the vehicle. Then select the appropriate Workshop Manual for
the rear final drive.

– Remove propshaft (version with splines on gearbox end) → Rear final drive 0BC; Rep.
gr.39 or→ Rear final drive 0BF and 0BE - sport differential; Rep. gr.39.
– Set up gearbox support -T10337- on engine and gearbox jack -V.A.G 1383 A- and position
underneath gearbox mounting.

– Slightly lift gearbox with engine and gearbox jack -V.A.G 1383 A-.

WARNING
Risk of accident.

Engine and gearbox jack -V.A.G 1383 A- must remain in position when work is being
carried out and must not be left unattended.
– Remove bolts -arrows- for tunnel cross member.
– Lower gearbox by dimension -a- using engine and gearbox jack -V.A.G 1383 A-.

 Dimension -a- = 100 mm (maximum)

– Unscrew nuts -arrows- and remove tunnel cross member.
– Place used oil collection and extraction unit -V.A.G 1782- below gearbox.

– Remove bolts -1 … 4- and carefully detach centre differential housing; gear oil (MTF) will drain
off.

Caution
Risk of damage to the centre differential.

Pull the centre differential housing slowly and carefully towards the rear off the
gearbox. The centre differential may otherwise fall out of the gearbox.

A centre differential which has fallen to the ground can no longer be installed.
If bearing plate -1- remains behind in centre differential housing, proceed as follows:

Caution
Risk of damage to the sealing surface of the centre differential housing.

Carefully tap the housing in several places with a hammer.

– Grip one of the side ribs on bearing plate -1- with pliers and pull off in direction of -arrow A-.

– While doing so, carefully tap alternate sides of housing -arrows B- with a rubber-headed
hammer.

Installing

Installation is carried out in reverse sequence; note the following:

 Tightening torques → Chapter „Exploded view - centre differential housing - propshaft with
splines on gearbox end“

Note
Renew the bolts for the centre differential housing.

– Thoroughly clean both housing joint surfaces; they must be free from oil and grease.
– Apply bead of sealant -arrow 1- evenly and not too thick on housing joint surface; for sealant
refer to → Electronic parts catalogue.

– To avoid contact corrosion, apply a ring of sealant around each bolt hole -arrow 2-.

– Lightly lubricate fitting surfaces for bearing plate with gear oil (MTF).
– Lightly lubricate surfaces of both races on outside of bearing plate with a small quantity of gear
oil (MTF).

– Insert bearing plate.

 Installation position: shoulder of bearing plate -arrow A- must engage in recess on gearbox
housing -arrow B-.
– Fit centre differential -2- onto gearbox -1-.

– Fit assembly sleeve -4- on centre differential.

– Insert spring -3- in centre differential.

– Press centre differential housing fully onto gearbox housing, keeping it centred, and hold in
place.

– Tighten bolts for centre differential housing → Fig..

– Install tunnel cross member and tighten → Chapter.

Note
Please refer to the vehicle data sticker or the identification on the rear final drive to find out which
type of rear final drive is installed in the vehicle. Then select the appropriate Workshop Manual for
the rear final drive.

– Install propshaft → Rear final drive 0BC; Rep. gr.39 or → Rear final drive 0BF and 0BE - sport
differential; Rep. gr.39.

– → Chapter „Filling up gear oil (MTF)“.

– Install exhaust system so it is free of stress → Engine, mechanics; Rep. gr.26.

– Install subframe cross brace → Running gear, front-wheel drive and four-wheel drive; Rep.
gr.40.

– Install noise insulation → General body repairs, exterior; Rep. gr.66.

Removing and installing rear splined shaft, oil seal and ball bearing for rear splined shaft
Special tools and workshop equipment required

Thrust plate -VW 401-

Thrust plate -VW 402-

Press tool -VW 412-

Drift sleeve -30 - 100-

Tube -2040-

Assembly tool -T40238-

Sealing grease → Electronic parts catalogue

Procedure

– Remove centre differential housing → Chapter.

– Remove circlip -arrow A-.

– Additionally remove circlip -arrow B- if ball bearing is also being removed.

– Rear splined shaft without vibration damper: pry off dust ring -1-.

Note
The dust ring cannot be removed without being damaged.
– Press out rear splined shaft (position centre differential housing in such a way that the shaft
does not make contact with thrust plates -VW 401- and -VW 402- when it is pressed out).

– Press out rear splined shaft with suitable drift.

– Lever out oil seal -1-.

Note
-Item 2- can be disregarded.
– If necessary, press out ball bearing for rear splined shaft.
– Press in ball bearing for rear splined shaft.

 Collar of tube -VW 415 A--arrow- faces press tool -VW 412-.
– Lightly oil outer circumference of oil seal and drive in onto stop using assembly tool -T40238-.

 Installation position: open side of oil seal points towards gearbox

– Pack space between sealing lip and dust lip half full with sealing grease; for sealing grease
refer to → Electronic parts catalogue.
– Insert rear splined shaft into centre differential housing from below.

– Press in rear splined shaft.

– Place housing with rear splined shaft on thrust plate -VW 402- under workshop press.

– Press inner bearing race onto rear splined shaft using drift sleeve -30 - 100-.
– Fit new circlips -arrow A- for rear splined shaft and -arrow B- for ball bearing.
– Rear splined shaft without vibration damper: clip on new dust ring -1-.

– Install centre differential housing → Chapter.

Power transmission > 7-speed dual clutch gearbox 0B5 (S tronic) > Final drive, differential, differential lock > Exploded view - centre differential housing - propshaft with splines on gearbox end > Removing and
installing rear splined shaft, oil seal and ball bearing for rear splined shaft

Renewing oil seal for rear splined shaft - vehicles without vibration
damper
Special tools and workshop equipment required

Extractor tool -T20143/1-

Assembly tool -T40238-

Sealing grease → Electronic parts catalogue

Procedure

Note

→ Chapter „Repair instructions“.

→ Chapter „Rules for cleanliness when working on the dual clutch gearbox“.

Note
Please refer to the vehicle data sticker or the identification on the rear final drive to find out which
type of rear final drive is installed in the vehicle. Then select the appropriate Workshop Manual for
the rear final drive.

– Remove propshaft → Rear final drive 0BC; Rep. gr.39 or → Rear final drive 0BF and 0BE -
sport differential; Rep. gr.39.
– Pry off dust ring -1-.

Note
The dust ring cannot be removed without being damaged.
– Pull out oil seal for rear splined shaft.

– Clean contact surface and sealing surface.

– Lubricate outer circumference of seal with gear oil.

– Fit guide sleeve -T40238/1--item 1- onto rear splined shaft.

– Pack space between sealing lip and dust lip half full with sealing grease; for sealing grease
refer to → Electronic parts catalogue.

– Slide on oil seal -2-.

 Installation position: the open side of the seal should face the gearbox housing.
– Drive in oil seal evenly all round as far as stop using assembly tool -T40238-. Make sure oil
seal remains straight.
– Clip on new dust ring -1-.

Note
Please refer to the vehicle data sticker or the identification on the rear final drive to find out which
type of rear final drive is installed in the vehicle. Then select the appropriate Workshop Manual for
the rear final drive.

– Install propshaft → Rear final drive 0BC; Rep. gr.39 or → Rear final drive 0BF and 0BE - sport
differential; Rep. gr.39.