Audi Q7: Repair Information
Guidelines for Clean Working Conditions
- Thoroughly clean the connection points and the surrounding area before loosening.
- Clean the transmission and transmission components using Cleaning Solution -D 009 401 04-.
- Use lint-free cloths when cleaning, for example, the "WYPALL X70/WORKHORSE" cloth made by Kimberly-Clark Professional.
- Seal all open lines and connections immediately with clean plugs or caps from the Engine Bung Set -VAS6122-.
- Place the removed parts on a clean surface and cover them. Use foil or lint-free cloths.
- Carefully cover or seal opened components if the repair will not be done immediately.
- Only install clean parts: remove the replacement parts from their packaging just before installing them.
- Protect the disconnected connectors from dirt and moisture and only connect when they are dry.
General Information
Transmission
- The 8-speed automatic transmission 0D5 is equipped with eight hydraulically activated forward gears. When the torque converter lock-up clutch is closed, these forward gears become manually driven gears through bypassing the torque converter slip.
- A special feature of the 0D5 transmission is the position of the front final drive (front axle differential with flange shafts) in front of the torque converter. This way an even distribution of the weight between the front and rear axles is attained.
Torque Converter
The torque converter is equipped with a slip-controlled torque converter lock-up clutch. Due to the new design of this transmission, the torque converter is located behind the front final drive.
Mechatronic
The Mechatronic combines the following components as a complete synchronized unit:
- Transmission Control Module -J217- hydraulic control
- The sensors and actuators
The Mechatronic unit is installed in the transmission in the area of the ATF pan.
Transmission Control Module -J217-
The control module is a component of the Mechatronic in the transmission.
Determining the driving situation and driving resistance dependent shift point occurs automatically.
Advantages:
- Shifting depending on fuel consumption
- Maximum engine output is always available
- Individual adaptation of shift points in all driving situations
- Gear shift points are infinitely variable
Shift Point Changes on Inclines and Declines
When driving on inclines or declines, gears are automatically selected using additional gear change maps. The selection is based on accelerator pedal position and the vehicle speed.
- The gear change map for extreme uphill stretches is matched to engine output.
- The gear change map for extreme downhill stretches is matched to the braking effect of the engine.
- By selecting a gear directly using tiptronic, the driver can use the engine braking effect with a specific gear engaged, for example when driving downhill with a trailer.
Selector Mechanism
- Under the "shift-by-wire" operating/shift concept, there is no longer a mechanical connection between the selector lever and the transmission. "Shift-by-wire" also means "electric shift".
- The driver is in control without a mechanical fall back.
- The selector lever does not move into shift gate for each selected driving gear as before, but rather it always returns to the starting position (neutral position) similar to a joystick. This means the selector lever position and transmission position selected do not match like before.
- The parking lock is electronically operated. In the case of an error a mechanical parking lock emergency release makes it possible to move the vehicle. Refer to → Chapter "Emergency Release from P".
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.
Some general repair information that applies to several procedures throughout this manual is summarized here. They apply to this repair manual.
Guided Fault Finding, OBD and Test Instruments
- Determine the cause of the malfunction as accurately as possible using Guided Fault Finding, OBD and Test Instruments before starting any repairs on the transmission use the Vehicle Diagnostic Tester.
Oil, Environmental and Disposal Regulations
- Handle ATF, gear oil and other fluids with care.
- Dispose of drained fluid properly.
- Follow the legal, environmental, and disposal regulations.
- Follow the instructions listed on the fluid packaging.
Special Tools
Refer to Workshop Equipment and Special Tools for a complete list of special tools used in the repair manual.
Transmission
- Follow the rules for clean working conditions when working on the transmission. Refer to → Chapter "Guidelines for Clean Working Conditions".
- Do not run the engine or tow the vehicle when the center differential housing is removed or when there is no ATF.
- Check the fluid levels after installation and fill if necessary: Refer to → Chapter "ATF Level, Checking" for ATF in the transmission. Refer to → Chapter "Gear Oil, Checking Level" for gear oil in the transmission. Refer to → Chapter "Capacities" for capacities. Refer to the Parts Catalog for specifications.
- It is necessary to check the parking lock emergency release after performing any work on it or after removing and installing the transmission. Refer to → Chapter "Emergency Release from P".
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.
- To install, thinly coat gaskets along outer circumference and on sealing lip with ATF.
- Coat the O-rings with ATF before inserting to prevent crushing rings during assembly.
- Use only ATF in the ATF area. Other lubricants cause malfunctions in the hydraulic transmission control.
- The open side of the gaskets point toward the fluid to be sealed in.
- When installing the new shaft seal, make sure the sealing lip does not run on the same point as the sealing lip from the old seal (use offset tolerance).
- Check the fluid levels after installation and fill if necessary: Refer to → Chapter "ATF Level, Checking" for ATF in the transmission. Refer to → Chapter "Gear Oil, Checking Level" for gear oil in the transmission. Refer to → Chapter "Capacities" for capacities. Refer to the Parts Catalog for specifications.
Bolts and Nuts
- Loosen the bolts opposite the tightening sequence.
- Nuts and bolts which secure covers and housings should be tightened in steps according to the specified tightening sequence or method.
- Bolts or nuts for securing covers and housings should be loosened and tightened diagonally in stages if no tightening sequence is specified.
- Replace the self-locking nuts and bolts.
- Use a wire brush to clean the threads of the bolts that were installed with locking fluid. Then insert the bolts with Locking Fluid -AMV 185 101 A1-.
- Threaded holes used for self-locking bolts or bolts coated with locking fluid 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.
- The tightening specifications given apply to unoiled bolts and nuts.
Circlips
- Do not stretch the circlips.
- Replace damaged or stretched circlips.
- The circlips must rest at the bottom of the groove.
Bearings
- Install needle bearings with the lettered side (thicker metal) facing the fitting tool.
- Insert bearing with axle oil or ATF, depending on the component location.
- Do not interchange the outer or inner races of bearings of the same size.
- Always replace the tapered roller bearings on one shaft together and use new bearings from a single manufacturer.
Shims
- Measure the shims at several locations with a micrometer. Different shim thicknesses make it possible to select the required thickness precisely. Install two shims if necessary.
- Check for burrs or damage. Only install flawless shims.
Contact Corrosion
Contact corrosion can occur if inadequate fasteners (bolts, nuts, washers, etc.) are used.
For this reason, only fasteners with a special surface coating may be installed.
In addition, rubber or plastic parts and adhesive are made of non-conductive materials.
If there are doubts about whether parts can be used or not, use new parts. Refer to the Parts Catalog.
Note
- Only original replacement parts are recommended. They are checked and are compatible with aluminum.
- The use of Audi accessories is recommended.
- Contact corrosion damage is not covered under warranty.
Wire Routing and Securing
- Mark for example the individual fuel, and vacuum lines for the EVAP canister system as well as the electrical wires before disconnecting and/or removing them. This will prevent a mix-up when reconnecting them. If necessary, draw sketches or take pictures.
- Due to the limited space inside the engine compartment, be especially careful when working near moving or hot parts to avoid damaging the lines.
