Audi Q5: Repair Information
General Repair Information
The highest level of care and cleanliness along with tools
that function properly are required to ensure a proper and
successful transmission repair. Of course the general safety
precautions also apply when carrying out repair work.
A list of general instructions that apply to multiple repair
procedures throughout the repair manual are summarized once here
under the "Components" section. Refer to
→ Chapter "Components". They apply to this repair
manual.
Safety Precautions and Test Procedures
WARNING
Incorrect repairs to the rear final 0BF and 0BE
could cause the final drive to malfunction.
Testing, assembling and servicing must be performed
by qualified personnel only.
Correct Oil Level
- Make sure the rear final drive is filled to specified oil
capacity. Refer to
→ Chapter "Capacities".
- Fix any leaks on the rear final drive, for example, on the
sealing surfaces or the seals. The oil can leak out through the
holes between the left -arrow 1- or
right -arrow 2- chamber and the
rear final drive.
Caution
Rear final drive malfunction.
- Do not drive the rear final drive if there are leaks
or insufficient oil.
- Leaks on the rear final drive must be corrected.
- Fill the ATF and/or gear oil if the levels are low.
- Only use ATF or gear oil available as a replacement
part. Refer to the Parts Catalog.
- If the leaks cannot be repaired, then the rear final
drive must be replaced.
Rear Final Drive Performance
WARNING
Transmission control malfunction.
Always maintain all specifications when replacing
transmission components. Only by doing so assures the
performance and the response characteristics of the rear
final drive 0BF and 0BE.
Replacing Transmission Components
- When replacing the All Wheel Drive Control Module -J492-,
the adaptation values for the transmission mount (for example
clutch wear, oil ageing) must be transmitted with the Vehicle
Diagnostic Tester otherwise the performance of the rear final
drive will be impaired.
- When replacing a chamber or the complete rear final drive,
the clutch classification must be entered again in the All Wheel
Drive Control Module -J492- using the Vehicle Diagnostic Tester.
If the clutch classification is not performed in the All Wheel
Drive Control Module -J492- then the rear final drive
performance will be impaired. When replacing a chamber, the
classification identification on the rear final drive housing
must be made unrecognizable. The identification of the new
classification is made on the new chamber housing.
- Do not place the removed rear final drive on any of the
components from the hydraulic control unit (for example, clutch
valves). This could damage the components.
- Replacing the Oil Pressure/Temperature Sensor -G437- and/or
Oil Pressure/Temperature Sensor 2 -G640-.
- The identity of the sensor in the All Wheel Drive Control
Module -J492- must be adapted using the Vehicle Diagnostic
Tester after replacing the Oil Pressure/Temperature Sensor
-G437- or the Oil Pressure/Temperature Sensor 2 -G640-.
- Do not replace both the Oil Pressure/Temperature Sensor
-G437- and Oil Pressure/Temperature Sensor 2 -G640- at the same
time because a valid sensor identity is needed for the rear
final drive classification to the All Wheel Drive Control Module
-J492-. If the both sensors are replaced at the same time, the
All Wheel Drive Control Module -J492- will interpret this as the
rear final drive is being replaced. By doing this, adaptation
values in the control module will be erased and the performance
of the rear final drive will be impaired.
- If both the Oil Pressure/Temperature Sensor -G437- and the
Oil Pressure/Temperature Sensor 2 -G640- must be replaced due to
mechanical damage, for example, if the connector housing gets
damaged, then this must be performed in two steps. After
replacing the first sensor, the identity of the must be adapted
in the All Wheel Drive Control Module -J492- using the Vehicle
Diagnostic Tester. Do the same for the second sensor.
- If both the Oil Pressure/Temperature Sensor -G437- and Oil
Pressure/Temperature Sensor 2 -G640- must be replaced at the
same time due to an electrical fault, then the clutch
classification must be entered into the All Wheel Drive Control
Module -J492- using the Vehicle Diagnostic Tester. Additionally
the ATF must be changed. Refer to
→ Chapter "ATF, Draining and Filling".
Torque Displacement, Checking
After the following work the function
22- Checking the torque displacement must be performed:
- Working on the rear final drive wiring
- Working on the valves: All Wheel Drive Clutch Valve -N445-
and All Wheel Drive Clutch Valve 2 -N446-.
- Working on the hydraulic control unit
Vehicle Lift Mode, Vehicles with Air Suspension
Activate the lift mode before lifting the vehicle on a frame contact hoist
(when there is no weight on the wheels). Refer to
→ Suspension, Wheels Steering; Rep. Gr.00; Repair Instructions; Wheel Bearing in
Control Position, Lifting Vehicles with Air Suspension.
Special Tools
Refer to the Special Tools Catalog for the complete list of special tools
used in this repair manual.
Components
Rear Final Drive
- Allocate bolts and other components according to final drive
code using the Parts Catalog
- When installing, check the oil level in the rear final drive
(Refer to
→ Chapter "Gear Oil, Checking Level".) and the ATF
level (Refer to
→ Chapter "ATF Level, Checking".) and fill if
necessary.
- Capacities and specifications. Refer to
→ Chapter "Capacities".
- Clean the contact surfaces when installing brackets and
waxed components. Contact surfaces must be free of wax and
grease.
- Thoroughly clean the connection points and the surrounding
area before loosening.
Oil, Environmental and Disposal Regulations
- Handle ATF, transmission fluid and other oils with care.
- Dispose of drained fluid properly.
- Follow the legal environmental and disposal regulations.
- Follow the instructions listed on the fluid packaging.
ATF and Gear Oil
Rear final drive 0BF and 0BE works with separated oil
chambers for the ATF and gear oil.
- For the hydraulics (hydraulic control unit and left and
right chambers) use only ATF which can be obtained as
replacement part. Refer to Parts Catalog.
- For the final drive (gear set, differential) use only the
gear oil which can be obtained as replacement part. Refer to the
Parts Catalog.
- Other ATF or gear oil can cause function problems.
Caution
Gear oil and ATF fluid change.
- For some RS models the gear oil as well as the ATF
must be changed.
- For all other vehicles there is no change interval.
Shaft Seals
- Lightly coat the shaft seal on the outer diameter with oil
before installing.
- The open side on the shaft seals faces the fluid to be
sealed off.
- After replacing any of the shaft seals, check the gear oil
level (Refer to
→ Chapter "Gear Oil, Checking Level".) or the ATF
level in the final drive (Refer to
→ Chapter "ATF Level, Checking".).
Shaft Seal for the Flange/Driveshaft
- Fill the space between the sealing lips
-arrow- halfway with Sealing Grease
-G 052 128 A1-.
Flange Shaft Seals
- Coat the space between the sealing lips
-arrow- with ATF.
O-Rings, Gaskets and Seals
- O-rings, gaskets and seals must always be replaced.
- After removing the seals, examine the contact surface on the
housing or shaft for burrs resulting from removal or for other
signs of damage.
- Thoroughly clean the housing separating surfaces before
assembling.
- Lightly lubricate the O-rings before inserting to prevent
the rings from being crushed during assembly.
- After replacing any of the gaskets, seal and o-rings, check
the gear oil level (Refer to
→ Chapter "Gear Oil, Checking Level".) or the ATF
level in the final drive (Refer to
→ Chapter "ATF Level, Checking".).
Circlips
- Do not stretch the circlips.
- Always replace damaged or stretched circlips.
- The circlips must rest at the bottom of the groove.
- Replace the adapter sleeves. Installation position: the slot
-A- should align with the line of
force -arrow-.
Bolts and Nuts
- Always loosen or tighten bolts and nuts on covers and
housings diagonally.
- Parts which are particularly sensitive must not be tilted
and must be loosen or tighten diagonally in stages.
- The tightening specifications given apply to unoiled bolts
and nuts.
- Always replace self-locking bolts and nuts.
- Clean threads of bolts that were applied with locking fluid
using a wire brush (does not apply to driveshaft bolts: these
must be replaced). Then insert the bolts with Locking Fluid -AMV
185 101 A1-.
- If self-locking bolts were installed or if regular bolts
were installed with locking fluid, then the threaded holes must
be cleaned, for example with a thread tap. Otherwise there is
the risk that the bolts could break off the next time they are
removed.
READ NEXT:
Overview - Driveshaft, Mounted On Transmission Side
Note
Pay attention to the general repair information. Refer to
→ Chapter "Repair Information".
The attached driveshaft can only be
SEE MORE:
Special tools and workshop equipment
required
Engine and Gearbox Jack -VAS6931- with Universal
Transmission Support -VAG1359/2-
Tensioning Strap -T10038-
Engine/Gearbox Jack Adapter - Wheel Hub Support - T10149-
Counterhold - Kit - Multiple Use -T10172- with Counterhold -
Kit - Adapter 5 - T
Physical Principles
The four known states of water also apply to air
conditioning system refrigerants.
1 - Gaseous (invisible)
2 - Vapor
3 - Liquid
4 - Solid
When water is heated in a container (heat absorption), water
vapor can be seen to rise. If the vapo