Hydraulic Control Module, Removing And Installing: Installing

Install in reverse order of removal. Note the following:

Tightening specifications. Refer to OVERVIEW - END COVER .

NOTE:

Always replace a dirty or defective hydraulic control module.

Replace gaskets and o-rings.

-- Replace the axial sealing elements -A- (quantity: 3) and -B-.

Installed position: The axial sealing elements -A- must be installed with the sealing lips facing upward, as illustrated.

Fig 1: Identifying Installed Position: Axial Sealing Elements Must Be Installed With Sealing Lips Facing Upward
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The color identification on the upper edge must be visible.

-- Coat the axial sealing elements with Automatic Transmission Fluid (ATF) before installing -arrow-.

-- Push the gearshift lever -2- in direction of -arrow- all the way forward so that the shifting cam -1- is almost vertical (slightly angled to the right).

Fig 2: Identifying Axial Sealing Elements -A And B

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-- Press control piston -B- on the back of the hydraulic control module outward (to the right) until it engages into the assembly spring -A-.

Fig 3: Pressing Control Piston -B- On Back Hydraulic Control Module Outward Until It Engages Into Assembly Spring

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-- With the pump shaft facing forward, install the hydraulic control module tilted downward into the transmission.

NOTE:

When installing control module, make sure that shifting cam (item 1 in Fig 2) refer to INSTALLING ) engages into free groove -arrow- on control piston -B-.

CAUTION:

Danger of damaging the hydraulic control module.

If the screws are tightened to the specification while the shifting cam or the control piston was incorrectly set, the hydraulic control module will get damaged.

-- Install the bolts -arrows- hand-tight.

Fig 4: Identifying Bolts

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Checking the Function of the Control Piston

Fig 5: Move Gearshift Lever -A- All Way Forward And Backward

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-- Move the gearshift lever -A- several times forward and backward -arrow 1-.

When doing this, the control piston -B- must travel outward and inward accordingly -arrow 2-.

If control piston does not move, shifting cam has not engaged into groove -arrow- at control piston on rear side of hydraulic control module. In this case:

Fig 6: Pressing Control Piston -B- On Back Hydraulic Control Module Outward Until It Engages Into Assembly Spring

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-- Remove the hydraulic control module again.

Check for Damage Possibly Caused by an Incorrect Installation:

Fig 7: Identifying Axial Sealing Elements -A And B

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It must be possible to easily move the control piston -B- left and right; if not, replace the hydraulic control module.
The shifting cam -1- or the selector shaft must have no damage due to an incorrect installation.

-- Install the hydraulic control module, refer to INSTALLING .

The control piston moves as described:

Fig 8: Identifying Bolts

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-- Tighten the screws -arrows- to the tightening specification.

Install the Slider for Selector Lever Position

Fig 9: Installing Roller -2- With Shoulder Of Selector Lever Lock Mechanism Lever -1- On Lever

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-- Install the roller -2- with the shoulder of the selector lever lock mechanism lever -1- on the lever.

-- Slide the selector lever lock mechanism lever -1- into the bearing hole in the hydraulic control module housing.

-- Move the selector lever lock mechanism lever -1- to the left opposite the direction of -arrow-, by doing this, the retaining tab -A- will turn in the slot in the retaining plate and -B- will be held there.

Fig 10: Moving Selector Lever Lock Mechanism Lever To Left Opposite The Direction Of -Arrow-

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CAUTION:

Danger of damaging the spring.

Do not remove or install the spring using sharp edged pliers or something similar.
If the spring wire gets damaged through notches or bends, the slider for selector lever position will not function correctly.

-- Install the spring -1- into the selector shaft -3- and the selector lever lock mechanism lever -1-.

Fig 11: Identifying Selector Shaft Catch

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Installation position of the spring -1- :

The bent end of the spring must be attached to the selector shaft -3-.
The round end of the spring must engage into the selector lever lock mechanism -2-.

-- Move the gearshift lever -A- all the way forward and backward -arrow 1-.

Fig 12: Move Gearshift Lever -A- All Way Forward And Backward

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NOTE:

Ignore -arrow 2- and -B-.

The detent plate -upper arrow- moves to the left and to the right.

Fig 13: Identifying Selector Shaft Catch
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When doing this, it must allow the roller -4- to engage in the individual notches.
The roller must be installed with the collar facing down so that it cannot be removed upward.

-- Install the Transmission Control Module -J217-. Refer to TRANSMISSION CONTROL MODULE, REMOVING AND INSTALLING .

CAUTION:

The following must be performed with a Vehicle Diagnostic Tester if the hydraulic control module was replaced:

-- Select the following menu options under Functions/Component selection in Guided Fault Finding on the Vehicle Diagnostic Tester:

Drivetrain
0AW transmission
01-OBD-capable systems
02-transmission electronics
02-Transmission electronics, functions
02 - Replacing the hydraulic control unit