General Repair Information
General Repair Information - 01J, Continuously Variable Transmission (CVT)
To ensure perfect and successful transmission repairs, the greatest care and cleanliness as well as the use of good and proper tools is essential. The usual basic safety precautions also apply when carrying out vehicle repairs.
A number of generally applicable instructions for individual repair procedures, which are otherwise mentioned at various points, are summarized here.
Transmission
^ Observe rules of cleanliness for working on the transmission.
^ Clean ATF lines and ATF cooler after performing repairs on the transmission.
^ Reusable components must be cleaned, checked and reconditioned if necessary before installation
After installing, following fluid levels must be checked and topped off if necessary:
^ ATF level.
^ Gear oil in front final drive.
^ Capacities and specifications.
O-rings, gaskets, seals
^ O-rings, gaskets and seals must be replaced.
^ After removing gaskets and seals, always inspect the contact surfaces at housing or shaft for burrs resulting from removal, or for other signs of damage.
^ The open side of the gaskets points toward the fluid to be sealed in.
^ To install, thinly coat gaskets along outer circumference and on sealing lip with ATF.
^ Coat O-rings with transmission fluid or Vaseline before inserting to prevent crushing rings during installation.
^ Use only ATF or Vaseline in areas near ATF. Other lubricating substances cause functional problems in the hydraulic transmission control.
^ When pressing in new gaskets, make sure the sealing lip does not run on the same point as the sealing lip of the old seal (use insertion depth tolerances).
^ Replace paper seals, always clean sealing surfaces and remove old seals completely.
Bolts and Nuts
^ Loosen bolts in reverse order of tightening.
^ Tighten and loosen bolts or nuts for securing covers and housings without tightening sequence in diagonal sequence in stages.
^ The tightening specifications stated apply to non-oiled nuts and bolts.
^ Replace self-locking bolts and nuts.
Fasteners
^ Do not over-stretch circlips.
^ Always replace damaged or over-stretched circlips.
^ Circlips must locate properly in the groove.
^ Replace spring pins. Installation position: Slot is longitudinal to line of force.
Mount
^ Slightly grease mount with ATF before inserting.
^ Attach mount and adjustment shims only with Vaseline. Other lubricating substances lead to functional problems in the hydraulic transmission control.
Contact Corrosion
General:
^ Contact corrosion can occur if non-approved fasteners are used on vehicle (bolts, nuts, washers, etc.).
^ For this reason, all fasteners used in production are specially treated.
^ In addition, rubber or plastic parts and adhesive are made of materials that do not conduct electricity.
^ If you are not sure about the suitability of parts, install new parts.
The following points should be observed especially for transmission:
^ Through approximately 2004, the transmission housing for the multitronic 01J transmission was made out of magnesium alloy; from 2005 it is made out of aluminum.
^ Bolts and other components which have direct contact with the transmission have a surface coating which is matched to the transmission housing.
^ On magnesium transmissions, bolts must always be replaced on the following bolted connections: Transmission housing cover and final drive cover on transmission housing as well as engine bolts on transmission.
^ Contact corrosion occurs when incorrect components (bolts, nuts, washers, etc.) are used. The transmission housing will be damaged.
^ Transmission housing, transmission cover and differential cover must all be of same material.
^ If you are not sure about the suitability of parts, install new parts.
Note:
^ Original replacement parts are recommended because they have been tested.
^ We recommend using Audi accessories.
^ Damage resulting from contact corrosion is not covered by the warranty.
Frequent Damage
Note:
^ Check the Transmission Control Module (TCM) J217 DTC memory before troubleshooting.
^ Check also DTC memory of Engine Control Module (ECM), as DTCs of the Engine Control Module (ECM) can lead to transmission malfunctions.
^ Check ATF level before checking the DTC memory.
^ For troubleshooting, use "Guided Fault Finding".