ATF Flushing
ATF Flushing
Special tools, testers and auxiliary items required
• Vehicle diagnosis, testing and information system ( VAS 5051) with diagnostic cable (VAS 5051/5A)
• ATF filler system F/CVT gearbox (VAS 5162)
• Triple square socket driver (3357)
• Drip tray
• Safety glasses
Work Procedure
• Transmission installed.
With a normal Automatic Transmission Fluid (ATF) change, only about 55 to 60% of the total ATF in the transmission is replaced.
The "ATF flush" procedure is necessary when old the ATF in the transmission must be removed completely.
The ATF must always be flushed with the following procedures:
• Changing the input shaft
• Servicing the input shaft
In addition, a test run must be performed 2 times and afterwards the ATF must be changed, as described below.
Only by doing this will the ATF in the transmission be changed completely.
CAUTION!
If all these steps are not followed completely, the transmission components will be damaged.
- After installing the transmission, perform the ATF, filling for ATF flushing process. Refer to => [ ATF Filling for Flushing Process ].
CAUTION!
• After installing the transmission with a new disc pack or input shaft, the vehicle diagnosis, testing and information system ( VAS 5051 A) must check before the first drive whether or not the update programming in the Transmission Control Module (TCM) (J217) must be carried out.
• If update programming is needed but not carried out, transmission components will be damaged.
• If update programming is not needed but carried out, transmission components will be damaged.
Check whether update programming in the Transmission Control Module (TCM) (J217) must be carried out.
• Vehicle diagnosis, testing, and information system ( VAS 5051) connected.
- Vehicle specific access to the vehicle diagnosis, testing, and information system (VAS 5051) in "Guided Fault Finding".
- Using the Go to button, select "Complaint registration " function in test plan and find following selection:
- Press " Transfer" text line and select test program " Jerking when accelerating from stop".
• Through this process in the vehicle diagnosis, testing, and information system (VAS 5051) update programming is only carried out for the Transmission Control Module (TCM) ( J217) if this is necessary.
- If necessary, carrying out update programming in Transmission Control Module (TCM) (J217).
ATF Flush
CAUTION!
If all steps are not carried out in correct order or followed exactly, transmission components will be damaged.
- => [ Input Shaft Adjustment, Checking Air Gap ]
- First test run pass through: => [ ATF Flush Test Run ].
- Second test run pass through: => [ ATF Flush Test Run ].
- Check and correct ATF level => [ ATF Level Checking ] ATF Level Checking.
• Observe all notes and test requirements for "Checking ATF level and topping off".
After ATF level is checked and restored, flushing process is complete.
Input Shaft Adjustment, Checking Air Gap
CAUTION!
Do not allow engine to run without filling ATF and do not tow the vehicle.
• Automatic Transmission Fluid (ATF) filled
- Drive vehicle off hoist.
• On vehicles with air suspension, vehicle lifting mode must be deactivated..
• ATF filled
- Place vehicle on level surface.
• With parking brake released, vehicle may roll forward or backward by itself when in selector lever position "N".
- Start the engine.
- Place the selector lever in the "N" position.
• Do not engage the parking brake.
• Do not operate the brake pedal.
- Press the accelerator.
• Vehicle should not be allowed to roll.
If the vehicle rolls in selector lever position " N":
- Adjust the selector lever cable:
• Selector lever cable adjusting, through VIN 8E 6A156499, refer to => [ Selector Lever Cable Adjusting ] Adjustments.
• Selector lever cable adjusting, from VIN 8E 6A156500, refer to => [ Selector Lever Cable Adjusting ] Adjustments.
If the selector lever cable adjustment is OK but the vehicle still rolls in selector lever position "N":
- Input shaft servicing, refer to one of the following:
• With 6 lining discs, refer to => [ General Information ] General Information.
• with 7 lining discs, refer to => [ General Information ] General Information.
• In this case, input shaft adjustment (air gap) was not performed correctly.
If the vehicle does not roll in the selector lever position " N":
The input shaft adjustment with evaluation of air play is OK.
- Carry out the ATF flush.
ATF Flush Test Run
• Automatic Transmission Fluid (ATF) filled, refer to => [ ATF Filling for Flushing Process ].
• The input shaft (air gap) adjustment is OK, refer to => [ Input Shaft Adjustment, Checking Air Gap ].
- Drive vehicle off hoist.
• On vehicles with air suspension, vehicle lifting mode must be deactivated..
CAUTION!
Do not allow the engine to run without filling with ATF and do not tow the vehicle.
- Follow the specifications exactly and carry out all safety instructions.
CAUTION!
In the following test drive, all traffic laws must be followed. If necessary, vehicle must be driven on a test site.
- Start the engine.
- Place the selector lever in the "D" position.
- Shift selector lever into the "Tiptronic gate".
- Move the wheels by lightly pressing the accelerator.
- Note driving mode display in the instrument cluster
- Move from 1st to highest gear by moving selector level towards " +".
- Then move back to 1st gear by moving selector lever back towards " -".
• Press the brake pedal if necessary
- Press the brake pedal and slow the vehicle down to 0 km/h.
- Place the selector lever in the "R" position.
- Accelerate the vehicle to 20 km/h by lightly pressing the accelerator.
- Press the brake pedal and slow the vehicle down to 0 km/h.
- Place the selector lever in the "D" position again and repeat the same procedure 5 times.
• The process must be repeated five times so that all the old ATF is mixed with the new ATF.
- Place the selector lever in the "P" position afterwards and switch the engine off.
- Drain the ATF. Refer to => [ ATF, Draining for ATF Flushing Process ].
- Fill with ATF. Refer to => [ ATF Filling for Flushing Process ].
- Carry out the ATF flush.
ATF, Draining for ATF Flushing Process
• Vehicle on a flat surface
• Observe disposal regulations!
• Activate the vehicle lifting mode before driving the vehicle with air suspension onto the hoist, that is, with all four wheels hanging.
- Loosen fasteners - 2 - and - 3 - and remove the rear noise insulation - B -.
- Place an oil drain pan underneath the transmission.
- Remove the Automatic Transmission Fluid (ATF) drain plug - A - using the triple square socket driver (3357 ) and drain the ATF.
- Install and tighten ATF drain plug.
• Tightening specification: 24 Nm.
CAUTION!
Do not allow engine to run without filling with ATF and do not tow the vehicle.
ATF Filling for Flushing Process
CAUTION!
• The Multitronic 01J transmission requires a different ATF than shift automatics. Only ATF for CVT transmissions which can be obtained as replacement part must be used.
• Do not allow engine to run without filling with ATF and do not tow the vehicle.
• Vehicle on a flat surface.
• The illustration on the reservoir for ATF filler system F/CVT gearbox (VAS 5162) in the upper left graphic refers to the use of special ATF for CVT transmissions.
• The illustration also shows pictures of the steps required to fill the transmission. These steps will be explained in the following.
- Secure the filled reservoir of the ATF filler system F/CVT gearbox (VAS 5162) as high as possible on the vehicle.
• The shut off valve on the ATF filler system F/CVT gearbox (VAS 5162) must be closed.
CAUTION!
• Engine must not be started if only a small amount or no ATF is in the transmission after repair work or after significant ATF loss.
• In this case, a preliminary filling with 4.5 to 5 liters of ATF must be performed.
- Remove the ATF inspection plug - B -.
- Thread the connection on the shut off valve of the ATF filler system F/CVT gearbox (VAS 5162) into the opening of the ATF inspection plug - B -.
- Rotate the shut off valve in the direction of the filler hose - lower arrow -. ATF flows into transmission.
- Fill the transmission with 5 liters of ATF.
- With the selector lever in the "P" position, start the engine and let it run at idle.
CAUTION!
Let the engine run at high speed at "2500 to 3000 RPM" for approximately 4 to 5 seconds immediately after starting.
Running the engine at high speeds is necessary so that the ATF pump is bled after a transmission repair.
If running at high speeds is not performed, the transmission can be damaged.
- Start the engine.
- By pressing the accelerator pedal, run the engine at high speed at "2500 to 3000 RPM" for approximately 5 seconds.
- Press the brake pedal and hold.
- Shift through all selector lever positions "P, R, N, D and S" and let each position remain shifted at idle for approximately 2 seconds.
- Place the selector lever in the "P" position and let the engine continue to run at idle.
- Remove the threaded connection on shut off valve of the ATF filler system F/CVT gearbox (VAS 5162) from the ATF inspection plug opening - B -.
- Allow the excess ATF to drain off.
- Install the ATF inspection plug - B -.
• Tightening specification: 24 Nm.