Volkswagen Golf / Golf GTI / Golf Variant. Manual - part 453

34 – Controls, Housing

1

Mechatronic

⇒ “1.1 Overview - Mechatronic”, page 28
⇒ “1.2 Mechatronic, Removing and Installing”, page 30

1.1

Overview - Mechatronic

1 - Transmission Fluid Drain

and Check Plug

❑ 45 Nm
❑ There is an overflow

pipe with a 8 mm inner

hex behind this bolt

-item 3-

⇒ Item 3 (page 28)

❑ Drain the transmission

fluid via the drain- and

check plug and re‐

moved overflow pipe

2 - Seal

❑ Replace after removing

3 - Overflow Pipe

❑ 3 Nm
❑ Plastic
❑ To drain the transmis‐

sion fluid, remove the

drain and check plugs.

Refer to -item 1-

⇒ Item 1 (page 28)

 , and

remove the overflow

pipe.

❑ The length of the over‐

flow pipe determines the

fluid level inside the

transmission

❑ Allocate according to

the Parts Catalog.

4 - Bolt

❑ Replace after removing
❑ Quantity: 10
❑ Tightening specification

and sequence. Refer to

⇒ Fig. ““Tightening Specification and Sequence for DSG Transmission Mechatronic -J743- ”“ ,

page 30

5 - Transmission Cover

❑ Removing and installing. Refer to 

⇒ “1.2 Mechatronic, Removing and Installing”, page 30

 .

6 - Bolt

❑ Replace after removing
❑ Quantity: 5
❑ Tightening specification and sequence. Refer to

⇒ Fig. ““Tightening Specification and Sequence for DSG Transmission Mechatronic -J743- ”“ ,

page 30

7 - Seal

❑ Replace after removing

8 - DSG Transmission Mechatronic - J743-

❑ Replace the O-ring after disassembly.
❑ With O-rings on connector
❑ Removing and installing. Refer to 

⇒ “1.2 Mechatronic, Removing and Installing”, page 30

 .

9 - Bleed Cap

❑ Placed on bleed pipe

10 - Bleed Pipe

❑ Replace after removing
❑ Pressed into transmission

11 - Transmission Fluid Pump

❑ Insert with new seal
❑ Removing and installing. Refer to

⇒ “8.2 Transmission Fluid Pump, Removing and Installing”, page 107

 .

12 - Transmission Fluid Pump Cover

❑ Replace after removing
❑ With seal
❑ Removing and installing. Refer to

⇒ “8.2 Transmission Fluid Pump, Removing and Installing”, page 107

 .

13 - Bolt

❑ Replace after removing
❑ Quantity: 4
❑ Tightening specification and sequence. Refer to

⇒ Fig. ““Tightening Specification and Sequence of the Transmission Fluid Pump Cover -A-.”“ ,

page 30

14 - Bolt

❑ Replace after removing
❑ Quantity: 4
❑ Different versions. For the correct allocation. Refer to the Parts Catalog.
❑ There are different bolts for the transmission fluid pump. Refer to 

⇒ page 109

15 - Seal

❑ Replace after removing

Tightening specification and tightening sequence of the trans‐

mission cover -A-.
– Tighten the bolts -arrows- diagonally in steps to 16 Nm.

Tightening Specification and Sequence for DSG Transmission

Mechatronic - J743-

Note

Always replace bolts that were tightened with an additional turn.

– Tighten the bolts in steps in the sequence shown:

Step

Bolts

Tightening Specification/Additional

Turn

1.

-1 to 10-

5 Nm

2.

-1 to 10-

Tighten 90° further.

Tightening Specification and Sequence of the Transmission Fluid

Pump Cover -A-.
– Tighten the bolts -arrows- diagonally in steps to 8 Nm.

1.2

Mechatronic, Removing and Installing

⇒ “1.2.1  DSG Transmission Mechatronic J743 , Removing and

Installing, Transmission Installed”, page 30

 .

⇒ “1.2.2  DSG Transmission Mechatronic J743 , Removing and

Installing, Transmission Removed”, page 39

 .

1.2.1

DSG Transmission Mechatronic -

J743- , Removing and Installing, Trans‐

mission Installed

Special tools and workshop equipment required
♦ Torque Wrench 5-50Nm - VAG1331-
♦ Used Oil Collection and Extraction Unit - SMN372500-
♦ Oil Filler - VAS6262A-

Caution

This procedure contains mandatory replaceable parts. Refer

to component overview prior to starting procedure.

Mandatory Replacement Parts
♦ Bolts - DSG

®

 Transmission Mechatronic - J743

♦ Bolts - Pendulum Support Bolts to Transmission

♦ Bolts - Transmission Fluid Pan
♦ Bolts - Transmission Fluid Pump Cover
♦ O-rings - DSG

®

 Transmission Mechatronic - J743

♦ Seal - Transmission Fluid Drain and Check Plug
♦ Seal - Transmission Fluid Pan

Note

♦

Follow the guidelines for clean working conditions. Refer to

⇒ “3.2 Clean Working Conditions”, page 5

 .

♦

Pay attention to the general repair information. Refer to

⇒ “3.3 General Repair Information”, page 6

 .

Removing
Always make sure that no dirt enters an “open” transmission.
Dirt entering can cause a transmission malfunction especially with

»open« Direct Shift Gearbox (DSG

®

) Mechatronic and/or trans‐

mission fluid pump.
The Mechatronic can get stuck on the alignment pins when the

transmission is very warm. Let the transmission cold down.
– Move the selector lever into “P”.
– Remove the noise insulation. Refer to ⇒  Body Exterior; Rep.

Gr.  66 ; Noise Insulation; Overview - Noise Insulation .

If present:
– Remove the connecting hose between the charge air cooler

and the charge air pipe. Refer to ⇒  Rep. Gr.  21 ; Overview -

Charge Air System .

Note

It is possible that parts, which have nothing to do with the Me‐

chatronic unit, will have to be removed. It depends on the vehicle

equipment. Make sure there is enough room around the Mecha‐

tronic unit.

♦ Depending on the vehicle, the parts could be:
♦ Fan mount -arrow-
♦ Charge or cold air pipes

Caution

Risk of destroying Mechatronic with static discharge.

♦ Do not touch contacts in the Mechatronic connector with

hands.

– To discharge any static electricity, touch the vehicle ground

with hand (without wearing a glove). Refer to 

⇒ page 7

 .