General, Technical Data (Manual Transmission 0b2 Awd (sedan)) Audi A4 B8

SAFETY PRECAUTIONS

Vehicles with the Start/Stop System

REPAIR INFORMATION

Carefulness, cleanliness and the correct tools are required for transmission repairs to be successful. The usual basic safety precautions also, naturally apply when carrying out vehicle repairs.

A number of generally applicable instructions for individual repair operations, which are otherwise mentioned at various points in the repair information, are summarized here. They apply to this repair information.

Special Tools and Equipment

Complete list of special tools used in this Workshop Information. See Service Net under Special Tools and Equipment.

Transmission

1. Servicing, refer to «Disassembly and Assembly»(/audi/a4/b8-2007-2012/remont/manual-trans/#controls-housing-manual-transmission-internal-components-0b2-awd-sedan) .
2. Allocate bolts and other components according to transmission code. Refer to Audi A4 «CODE LETTERS, ASSEMBLY ALLOCATION, RATIOS, CAPACITIES»(/audi/a4/b8-2007-2012/remont/manual-trans/#general-technical-data-manual-transmission-0b2-awd-sedan__code-letters-assembly-allocation-ratios-capacities) .
3. Check the transmission fluid level when replacing the manual transmission and fill if necessary. Refer to «MANUAL TRANSMISSION, CHECKING TRANSMISSION FLUID LEVEL»(/audi/a4/b8-2007-2012/remont/manual-trans/#controls-housing-manual-transmission-0b2-awd-sedan__manual-transmission-checking-transmission-fluid-level) .
4. Capacities and specifications, refer to Audi A4 «CODE LETTERS, ASSEMBLY ALLOCATION, RATIOS, CAPACITIES»(/audi/a4/b8-2007-2012/remont/manual-trans/#general-technical-data-manual-transmission-0b2-awd-sedan__code-letters-assembly-allocation-ratios-capacities) .
5. Always clean the connection locations and the area around them before loosening.
6. When installing transmission, make sure that the alignment bushings are installed correctly.

Sealant

1. Thoroughly clean the housing joint surfaces before applying the sealing compound.
2. Apply sealing compound AMV 188 001 02 evenly and not too thickly.
3. Do not allow any sealing compound to get into the ventilation holes.

O-rings, Shaft Seals, Seals

Scheme 200

1. O-rings, shaft seals and seals must be replaced.
2. After removing gaskets, examine contact surface on housing/shaft for burr resulting from removal or for other signs of damage.
3. Thoroughly clean housing joint surfaces before assembling.
4. Before installing the shaft seals, lightly oil the outer circumference and fill the space between the sealing lips -arrow- halfway with grease G 052 128 A1.
5. The open side of the shaft seals point toward the fluid to be sealed in.
6. Press in new shaft seal, so that the sealing lip does not run on the same point as the sealing lip of the old shaft seal (use insertion depth tolerances).
7. Lightly lubricate O-rings before installing to prevent them from being crushed when inserting.
8. After replacing the seals and sealing rings, check the transmission fluid level and fill if necessary. Refer to «MANUAL TRANSMISSION, CHECKING TRANSMISSION FLUID LEVEL»(/audi/a4/b8-2007-2012/remont/manual-trans/#controls-housing-manual-transmission-0b2-awd-sedan__manual-transmission-checking-transmission-fluid-level) .

Fasteners

Scheme 201

1. Do not overstretch the circlips.
2. Always replace damaged or stretched circlips.
3. The circlips must fit completely inside the groove.
4. Replace the adapter sleeves. Installed position: Slit -A- should be in line with the line of force -arrow-.

Bolts and Nuts

1. Loosen the bolts and nuts opposite the tightening sequence.
2. Nuts and bolts which secure covers and housings should be loosened and tightened crosswise in stages if no tightening sequence is specified.
3. Parts which are particularly sensitive to distortion must be kept straight when removing and installing; loosen or tighten diagonally in stages.
4. The tightening specifications stated apply to non-oiled nuts and bolts.
5. Always replace self-locking nuts and bolts.
6. Use a wire brush to clean the threads of bolts that were screwed in with locking compound. Next, use locking compound AMV 185 101 A1 to install the bolts.
7. Threaded holes into which self-locking bolts or bolts coated with locking fluid are screwed, must be cleaned (for example tap). Otherwise there is a risk that the bolts will shear the next time they are removed.

Clutch Mechanism

1. When removing transmission, remove the clutch slave cylinder without opening the lines.
2. If the clutch slave cylinder is removed with the hydraulic line attached, do not depress clutch pedal. Otherwise the piston will be pressed out of the clutch slave cylinder. The clutch slave cylinder will get damaged.
3. If the clutch pedal does not return to the starting position (rest position) after recoupling it, bleed the clutch system. Additional information, refer to «CLUTCH MASTER OR SLAVE CYLINDER INFORMATION»(/audi/a4/b8-2007-2012/remont/clutches-manual-hydraulic/#clutch-manual-transmission-0b2-awd-sedan-as-of-032011__clutch-master-or-slave-cylinder-information) .
4. To reduce odor caused by a burnt clutch, thoroughly clean the transmission housing around the clutch as well as the engine on the transmission side.
5. Only use compressed air to clean the clutch module.
6. Change the fluid for the clutch system at the same interval when changing the brake fluid for the brake system. Refer to «MAINTENANCE, DIAGNOSIS»(/audi/a4/b8-2007-2012/remont/procedures/#how-to-diagnosis-the-maintenance-maintenance-intervals-sedan)

TRANSMISSION IDENTIFICATION

1. Allocation Audi A4, refer to «CODE LETTERS, ASSEMBLY ALLOCATION, RATIOS, CAPACITIES»(/audi/a4/b8-2007-2012/remont/manual-trans/#general-technical-data-manual-transmission-0b2-awd-sedan__code-letters-assembly-allocation-ratios-capacities)

Location on Transmission

Scheme 202

1. Arrow A- manual transmission 0B1/2 (Scheme 203)
2. Arrow B- engine code and build date (Scheme 204)
3. Arrow C- code letters and date of manufacture on the bottom of the transmission housing (not on all versions)

Scheme 203

1. 0B1 = FWD transmission
2. 0B2 = AWD transmission (recognizable on the driveshaft flange)

Scheme 204

Note. Additional data depend on the manufacturing. The transmission code letters are also included on the vehicle data labels.

REAR FINAL DRIVE 0BC AND 0BD IDENTIFICATION

The following rear final drives are allocated to the manual transmission 0B2 AWD, depending on the version and engine

1. «REAR FINAL DRIVE 0BC»(/audi/a4/b8-2007-2012/remont/manual-trans/#general-technical-data-manual-transmission-0b2-awd-sedan__rear-final-drive-0bc)
2. «REAR FINAL DRIVE 0BD»(/audi/a4/b8-2007-2012/remont/manual-trans/#general-technical-data-manual-transmission-0b2-awd-sedan__rear-final-drive-0bd)

Note. When installing a new rear final drive unit, the final drive code, the PR number and the vehicle engine code must be verified. This is the only to assure the correct allocation.

REAR FINAL DRIVE 0BC

Note. Code letters, transmission allocations, ratio and capacities, refer to Specifications . When repairing the driveshaft or the rear final drive, refer to Removal and Installation .

Identification Allocation on Final Drive

Final drive 0BC -arrow 1- and 0AR

Scheme 205

Engine code and build date -arrow 2

Final Drive 0BC -arrow- and 0AR

Scheme 206

Note. "0AR" can always be found on the rear final drive housing. Changes to the housings is what differentiate the "0BC" and "0AR" final drives. They can also be distinguished by the location of the threaded holes -arrows- for securing the crossmember on the rear final drive. The final drive "0BC" has 4 threaded holes -arrows- in the housing for securing the crossmember There is also an additional threaded hole for securing the final drive to the subframe under the flange/driveshaft.

Rear Final Drive Code Letters and Build Date

Scheme 207

Additional data can be ignored.

Note. When installing a new rear final drive unit, the final drive code, the PR number and the vehicle engine code must be verified. This is the only way to assure the correct allocation.

REAR FINAL DRIVE 0BD

Note. Code letters, transmission allocations, ratios, capacities, refer to Specifications . When repairing the driveshaft or the rear final drive, refer to Removal and Installation

Location on Rear Final Drive

Final drive 0BD, code letters and manufacture date -arrow

Scheme 208

A arrow- Final Drive 0BD, Including Part Number (for example: 0BD 500 043A)

Scheme 209

Arrow B- code letters "JTN"

Arrow C- Rear final drive date of manufacture

Additional data can be ignored.

Note. When installing a new rear final drive unit, the final drive code, the PR number and the vehicle engine code must be verified. This is the only to assure the correct allocation.

POWERTRAIN OVERVIEW

Note. The -arrows- point in direction of travel.

Scheme 210

1. 1 - Engine
2. 2 - Drive Plate With a needle bearing for the input shaft bearing
3. 3 - Clutch Module Consists of the pressure plate, clutch disc and dual mass flywheel with transfer plate
4. 4 - Front Differential
5. 5 - Driveshaft (main shaft)
6. 6 - Front Drive Pinion with Side Shaft
7. 7 - Output Shaft
8. 8 - Manual Transmission
9. 9 - Center Differential
10. 10 - Driveshaft
11. 11 - Rear Pinion
12. 12 - Rear Differential
13. I - 1st Gear
14. II - 2nd Gear
15. III - 3rd Gear
16. IV - 4th Gear
17. V - 5th Gear
18. VI - 6th Gear
19. R - Reverse Gear
20. S - Intermediate Drive Gears With beveloid splines
21. A1 - Front Final Drive
22. A2 - Rear Final Drive

CODE LETTERS, ASSEMBLY ALLOCATION, RATIOS, CAPACITIES

1. Production date
2. Transmission fluid specification
3. The individual gear ratios
4. Flange shaft allocation
5. The dual mass flywheel allocation
6. Clutch disc and pressure plate allocation
7. Rear final drive allocation using code and PR number

See also:
• Disassembly and Assembly
• MANUAL TRANSMISSION, CHECKING TRANSMISSION FLUID LEVEL
• CLUTCH MASTER OR SLAVE CYLINDER INFORMATION
• MAINTENANCE, DIAGNOSIS
• Specifications
• Removal and Installation
• CODE LETTERS, ASSEMBLY ALLOCATION, RATIOS, CAPACITIES
• REAR FINAL DRIVE 0BC
• REAR FINAL DRIVE 0BD