Gears, Hydraulic Controls (Automatic Transmission 0b6 Awd (sedan)) Audi A4 B8

ATF PAN, ATF STRAINER AND MECHATRONIC OVERVIEW

Note. Always replace the Mechatronic unit if it is dirty or faulty. Automatic transmission clean working conditions, refer to CLEAN WORKING CONDITIONS . General repair instructions, refer to REPAIR INFORMATION . Coat O-rings and seals with ATF. Other types of lubrication lead to faults in the transmission hydraulics.

Scheme 337

1. Bolt Replace 2.5 Nm plus an additional 90° turn Quantity: 13 Follow the tightening sequence, refer to «AUTOMATIC TRANSMISSION FLUID OIL PAN»(/audi/a4/b8-2007-2012/remont/automatic-trans/#gears-hydraulic-controls-automatic-transmission-0b6-awd-sedan__automatic-transmission-fluid-oil-pan) Oil pan to transmission
2. ATF Drain Plug Replace 12 Nm
3. ATF Inspection Plug 9 Nm
4. O-ring Replace
5. ATF Pan Refer to «AUTOMATIC TRANSMISSION FLUID OIL PAN»(/audi/a4/b8-2007-2012/remont/automatic-trans/#gears-hydraulic-controls-automatic-transmission-0b6-awd-sedan__automatic-transmission-fluid-oil-pan)
6. Magnet Quantity: 2 round magnets, different from illustration Ensure full surface contact Clean before installation
7. Cover Cap Inserted in oil pan opening
8. Not Installed
9. Oil Pan Seal Replace
10. Oil Screen Refer to «ATF STRAINER»(/audi/a4/b8-2007-2012/remont/automatic-trans/#gears-hydraulic-controls-automatic-transmission-0b6-awd-sedan__atf-strainer)
11. O-ring Replace
12. Wiring Harness Connector Clip
13. Wiring Harness in Transmission With and without locking mechanisms on the connector depending on the build version Refer to «WIRING HARNESS IN TRANSMISSION»(/audi/a4/b8-2007-2012/remont/automatic-trans/#gears-hydraulic-controls-automatic-transmission-0b6-awd-sedan__wiring-harness-in-transmission)
14. Bolt 8 Nm Following removal and installation instructions, refer to «MECHATRONIC UNIT»(/audi/a4/b8-2007-2012/remont/automatic-trans/#gears-hydraulic-controls-automatic-transmission-0b6-awd-sedan__mechatronic-unit)
15. Mechatronic Refer to «MECHATRONIC UNIT»(/audi/a4/b8-2007-2012/remont/automatic-trans/#gears-hydraulic-controls-automatic-transmission-0b6-awd-sedan__mechatronic-unit)
16. Seal

FASTENER TIGHTENING SPECIFICATIONS

AUTOMATIC TRANSMISSION FLUID OIL PAN

Special tools and workshop equipment required

1. Assembly Pin T40199

Removing

Note. Automatic transmission clean working conditions, refer to CLEAN WORKING CONDITIONS . General repair instructions, refer to REPAIR INFORMATION .

Remove the tunnel crossmember. Refer to TUNNEL CROSSMEMBER .

Remove the subframe crossbrace. Refer to Removal and Installation .

Scheme 338

Drain the ATF -arrow- ATF, DRAINING OR FILLING AFTER REPAIR .

Scheme 339

Remove the bolts from the ATF pan opposite the tightening sequence: -13 to 1-.

Remove the ATF oil pan.

Installing

Install in reverse order, paying attention to the following

1. Tightening specifications, refer to «ATF PAN, ATF STRAINER AND MECHATRONIC OVERVIEW»(/audi/a4/b8-2007-2012/remont/automatic-trans/#gears-hydraulic-controls-automatic-transmission-0b6-awd-sedan__atf-pan-atf-strainer-and-mechatronic) .

Note. Replace the seal. Replace the ATF pan bolts. With high mileage vehicles, replace the ATF strainer when the ATF pan is removed. Refer to ATF STRAINER . Otherwise the ATF strainer must be replaced only if it is damaged.

Clean all magnets in the ATF oil pan. Make sure the magnets are in full contact with the ATF oil pan.

Clean the sealing surface from all sealant residue.

Install the T40199 in locations -10, 11, 12, and 13- with the ATF pan removed.

Note. The T40199 center the gasket and the ATF oil pan. This will make sure the ATF oil pan seals correctly.

Install the new gasket and ATF oil pan over the T40199.

Tighten the new ATF oil pan bolts in the following sequence: -1 to 9-.

Remove the T40199.

Install the remaining bolts in sequence -10, 11, 12, and 13-.

Install the subframe crossbrace. Refer to Removal and Installation .

Install tunnel crossmember. Refer to TUNNEL CROSSMEMBER .

Fill the ATF. Refer to ATF, DRAINING OR FILLING AFTER REPAIR .

ATF STRAINER

Removing

Note. Automatic transmission clean working conditions, refer to CLEAN WORKING CONDITIONS . General repair instructions, refer to REPAIR INFORMATION .

Remove the ATF oil pan. Refer to AUTOMATIC TRANSMISSION FLUID OIL PAN .

Carefully remove the ATF strainer -A- from the transmission.

Scheme 340

Installing

Note. The ATF strainer seal -A- normally stays in the transmission. The seal must be removed first to replace the ATF strainer. The same seal can be used again if the old ATF strainer is also being used again.

Note the following when replacing with a new ATF strainer

Note. Replace the ATF strainer only if it is damaged. With high mileage vehicles, replace the ATF strainer when the ATF pan is removed.

Carefully remove the ATF strainer seal -A- from the transmission with a screwdriver.

Note. Do not damage sealing surface. The illustration shows seal with the Mechatronic unit removed. The new ATF strainer comes with the seal installed.

Continuation for New and Old ATF Strainer

Carefully press the intake neck on the new ATF strainer -A- into the opening on the transmission as far as the stop.

Note. When replacing with a new ATF strainer, press it into the transmission with the seal already installed.

Install the ATF pan. Refer to AUTOMATIC TRANSMISSION FLUID OIL PAN .

Fill the ATF. Refer to ATF, DRAINING OR FILLING AFTER REPAIR .

MECHATRONIC UNIT

Removing

Note. Automatic transmission clean working conditions, refer to CLEAN WORKING CONDITIONS . General repair instructions, refer to REPAIR INFORMATION . Always replace the Mechatronic unit if it is dirty or faulty.

Disconnect the battery. Refer to Removal and Installation .

Remove the ATF oil pan. Refer to AUTOMATIC TRANSMISSION FLUID OIL PAN .

Remove the ATF strainer. Refer to ATF STRAINER .

Touch the vehicle ground with a bare hand to discharge the static electricity.

Note. To remove the Mechatronic, first remove the connector -C- and the wiring harness -B- from the mechatronic. The wiring harness connector -A- remains installed in the transmission housing. If the tab -arrow- on the backside of the wiring harness breaks off, the wiring harness must be replaced. The following description shows the Mechatronic removed. The wiring harness connector -A- is still installed in the transmission housing. The connector -C- may be installed with or without locking mechanisms -1- and -2- depending on the version.

Release both locking mechanisms -1- and -2- on the connector -C-, if applicable.

Scheme 341

Disconnect the connector -C- from the socket -D- on the Mechatronic.

Remove the wiring harness -A- from the Mechatronic -B-. Disengage the tab -arrow-, on the back of the wiring harness, from the Mechatronic.

Note. If the tab -arrow- on the backside of the wiring harness breaks off, the wiring harness must be replaced.

Carefully lay the wiring harness aside.

Note. The wiring harness is connected to the installed connector -3- and cannot be removed.

Remove Mechatronic bolts in reverse order, for example first bolt -14-, then -13-, through -1-.

Scheme 342

Note. Only the indicated bolts -14 through 1- may be loosened. If other bolts are loosened, this may affect the function of the Mechatronic unit or it may come apart.

Remove the Mechatronic from the transmission.

Installing

1. Tightening specifications, refer to «ATF PAN, ATF STRAINER AND MECHATRONIC OVERVIEW»(/audi/a4/b8-2007-2012/remont/automatic-trans/#gears-hydraulic-controls-automatic-transmission-0b6-awd-sedan__atf-pan-atf-strainer-and-mechatronic) .

Make sure the seal -B- is installed correctly and is secure.

Scheme 343

Set Mechatronic unit in place without using force, and at the same time insert stud on the selector lever -arrow- into the groove on the selector slide -A- ; if necessary, move selector slide back or forth.

Scheme 344

Tighten the bolts -1- and -2- on the Mechatronic to 2 Nm.

Tighten the bolts on the Mechatronic to the tightening specification and in the given sequence, that is, first bolt -1-, then -2- through -14-.

Attach the wiring harness -A- to the Mechatronic. At the same time, insert the tab -arrow- on the back of the wiring harness into the Mechatronic unit.

Note. If the tab on the backside of the wiring harness breaks off, the wiring harness must be replaced.

Remove both locking mechanisms -1- and -2- on the connector -C- as illustrated, if applicable.

Carefully insert the connector -C- into the Mechatronic connector socket.

Press both locking mechanisms -1- and -2- in on the connector -C- to secure it, if applicable.

Scheme 345

Install in reverse order of removal paying attention to the following

Install the ATF strainer. Refer to ATF STRAINER .

Install the ATF pan. Refer to AUTOMATIC TRANSMISSION FLUID OIL PAN .

Fill the ATF. Refer to ATF, DRAINING OR FILLING AFTER REPAIR .

WIRING HARNESS IN TRANSMISSION

Removing

Remove the Mechatronic unit. Refer to MECHATRONIC UNIT .

To discharge static electricity, touch the transmission housing (without wearing gloves).

Disconnect the connector on transmission by rotating screw connections counter-clockwise -arrow-.

Scheme 346

Remove the wiring harness clip -A-.

Scheme 347

Note. Ignore -arrows-.

Press the wiring harness connector -B- into the transmission and remove the wiring harness.

Installing

Install in reverse order, paying attention to the following

Replace wiring harness connector O-rings and lightly coat with ATF.

Insert the wiring harness connector into the transmission housing while following the installation position.

Install the clip -A- on the wiring harness connector -B-.

Install Mechatronic unit. Refer to MECHATRONIC UNIT .

SPECIAL TOOLS

Special tools and workshop equipment required

1. Assembly Pin T40199

See also:
• CLEAN WORKING CONDITIONS
• REPAIR INFORMATION
• TUNNEL CROSSMEMBER
• Removal and Installation
• ATF, DRAINING OR FILLING AFTER REPAIR
• Removal and Installation
• AUTOMATIC TRANSMISSION FLUID OIL PAN
• ATF STRAINER
• WIRING HARNESS IN TRANSMISSION
• MECHATRONIC UNIT
• ATF PAN, ATF STRAINER AND MECHATRONIC OVERVIEW