AFT Drain, fill, level check - 0CJ 0CK 0CL 0HL

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DrPeter

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Hello,

I compiled the information below a while ago and I do believe it is ready for the Ross-Tech forum!

This is a guide to be used when servicing the following transmissions: [0CJ] [0CK] [0CL] [0HL].
In addition to this guide you will need the correct Official Factory repair manual for your vehicle, no 'if' 'ands' or 'butts'!!!


Important:
The information below is deemed reliable but not 100% guaranteed, use the following at your own risk. Stop now if you do not wish to continue.
We cannot and will not be responsible for any damages and or errors directly or indirectly caused by the use of the information given.


Using the Official Factory repair manuals, follow ALL the "Test conditions" in the "ATF Pump, Deactivating and Draining the Hydraulic Pump Reservoir" section of the repair manual.


There are three parts to this guide:
  1. Draining ATF
  2. Filling ATF
  3. Checking ATF



1) Draining ATF

"WARNING - The system is under pressure"

Prerequisites:
Ignition ON / Engine OFF​
Gear selector in Park​
Parking brake on​
Vehicle on absolutely flat level surface​


With VCDS, select the [02-Auto Trans]
- Select [Adaptation-10]
- From the pull-down menu select [Oil pressure reservoir emptying]
- [New Value] = "Activate", press [Do it!], then press [Go Back]

- Select [Adv.Meas.Values], then select the following for display:
- "Oil pressure reservoir: status of emptying"
- "Oil pressure reservoir: pressure - Data" (optional)
- "Electrical pump 2 for trans. oil: actual speed" (optional)
- "Oil pressure reservoir: status" (optional)

You should see the following information for "status of emptying":
[Value]: "Leeren aktiv" or "Empty active" (briefly)

Then when complete you should see [Value]:
"Druckspeicher entleert/ATF-Motor gesperrt" or "Pressure accumulator emptied/ATF motor disabled"

[Done, Go Back], [Close Controller, Go Back-06], switch ignition [Off].


The transmission is now ready for service and the following is true:
- Auxiliary Hydraulic pump (V552 / ATF pump) is now disabled.
- Pressure accumulator has been drained.
- Vehicle MUST NOT be driven
- P187E - Oil Pressure Reservoir, No Pressure (in memory)
- Mechatronic can be removed for service

As per the Official Factory Repair manuals, Drain the ATF oil (T60 Torx), verify all the oil is drained.





2) Filling ATF

Follow the the Official Factory repair manual to "Draining and filling ATF".

Important:
It is possible to 'overfill' the AFT and mix the ATF and MTF(Manual Transmission Fluid)!!
We strongly recommend to check and note the exact MTF level. If the level is to high, it could indicate mixing of ATF oil, due to a internal leak, between ATF and MTF.
According to the manufacture, Audi, any mixing or operation with this condition WILL irreversibly damage the transmission!


Prerequisites:
Ignition OFF / Engine OFF​
Gear selector in Park​
Parking brake on​
Vehicle on absolutely flat level surface​
Remove the T30 Torx M10x1.0 - Filling AND Control plug.​

Refill ATF* as per the Official Factory Repair manuals.

Tools needed:
Oil hand pump VAS 6617, 6617/1, 6617/2 (aluminum pan)​
Oil hand pump VAS 6617, 6617/1, 6617/2, 7717/12 (plastic)​

*Use ONLY Audi approved G 055 529 A2 dual clutch gearbox oil.
(Max. filling volume is 3.5 liters)


Ignition [On], Engine [Off] - (Only after adding ATF)

With VCDS, select the [02-Auto Trans]
- Select [Adaptation-10]
- From the pull-down menu select [Oil pressure reservoir emptying]
- [New Value] = "OFF", press [Do it!], then press [Go Back]

Verify the [Adv.Meas.Values]:
"Oil pressure reservoir: status of emptying" = [Not active]

[Done, Go Back], [Close Controller, Go Back-06], switch ignition [Off] for 30 seconds. Proceed to "Checking ATF" fluid level.






3) Checking ATF

Prerequisites:
Ignition ON / Engine Idle​
Gear selector in Park​
Transmission is NOT in Emergency Running mode​
Parking brake on​
HVAC is [OFF]​
Vehicle on absolutely flat level surface​

With VCDS, select the [02-Auto Trans]
Verify the [Adaptation-10] [Oil pressure reservoir emptying] is [OFF].
- If not set the [New Value] to [OFF].


(Optional)
Supposedly you can increase the ATF fluid temperature by using this Basic Setting: [Set ATF-temperature]*
Select [Basic Settings-04], [Set ATF-temperature]
Specified temperature: 35°C > pre-set temperature: Yes > [Go!]
(*This is not yet tested with VCDS on a vehicle).

(Recommended)
- Select [Adv.Meas.Values] = "Transmission fluid temperature"
Target temperature is [35°C], this is the minimum temp the ATF fluid level can be checked at. Wait till the correct temperature is achieved.


Once the ATF temperature is at [35°C] it will be necessary to activate the ATF motor, see Adaptation steps below.
Then follow the Official Factory repair manual "Checking ATF level".


- Select [Adaptation-10] - From the pull-down menu select
[ATF_motor_speed_requirement - Activation]
- [New Value] = "Vorgabe Aktiv", press [Do it!]

(Run the pump at this speed for 20 seconds)
- Select [Adaptation-10] - From the pull-down menu select
[ATF_motor_speed_requirement - Motor Speed Requirement]
- [New Value] = "3000", press [Do it!] (Default value = 0)

(Run the pump at this speed for 90 seconds)
- Select [Adaptation-10] - From the pull-down menu select
[ATF_motor_speed_requirement - Motor Speed Requirement]
- [New Value] = "600", press [Do it!] (Default value = 0)



As per the manual:
"Note:
- The ATF level can be checked at the ATF inspection and filler hole.
- The ATF level is correct if a small amount of fluid comes out at the ATF inspection and filler hole when ATF temperature is between 35°C and 45°C (the fluid level rises due to expansion as it warms up)."


Tighten inspection/filler hole after the correct fluid level has been obtained.

(Shut down the ATF pump)
- Select [Adaptation-10] - From the pull-down menu select
[ATF_motor_speed_requirement - Motor Speed Requirement]
- [New Value] = "keine Vorgab", press [Do it!]

"Stop the Engine" and then turn the ignition back on, check /clear fault codes. Road test, check for leaks and fault codes.

-end-





  • Feedback is requested!
  • As mentioned before, we have not tested this procedure and can not guarantee the results.
  • This is all that we have on this subject.

Thank you....

drpeter
 
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