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Automatic transmission control valve assembly: disassemble and assemble — VW

Automatic transmission control valve assembly: disassemble and assemble on VW: factory workshop procedure. Full factory text, tools and checks.

Workshop procedure for VW — the factory write-up, straight from real workshop data.

factory workshop text

📋 Procedure

ℹ️ Torque figures below come verbatim from workshop data — always cross-check against your vehicle's factory manual before final tightening.

VW
Polo
2003
Power transmission
4 - Speed automatic gearbox 001
Edition
10.2004
Automatic transmission control valve assembly: disassemble and assemble
Assembly sequence
Chapter
WARNING
Do not start the engine with the gearbox crankcase disassembled or without ATF; do not tow the vehicle
Note
The automatic transmission control valve assembly or the harness can also be disassembled with the gearbox assembled.
The electric valves can be changed
Do not use cloths that release threads.
Check if the ATF level is refilled after the oil sump is assembled again
Chapter
Locking screw, 15 Nm
Always replace the retainer
Fig.
ATF level: check and fill
Chapter
Overflow pipe
Disassemble it to let the ATF bleed
Chapter
Screw, 8 Nm
Oil sump
Assembly sequence
Chapter
Electromagnet
Place in the oil sump mouth
Screw, 8 Nm
ATF sieve
Supporting plate
with electric valves: -N88-, -N89-, -N90-, -N91-, -N92-
Screw, 8 Nm
M6 x 35 mm
Screw, 8 Nm
M6 x 68 mm
Screw, 8 Nm
M6 x 12 mm
Screw, 8 Nm
Screw, 8 Nm
M6 x 75 mm
Screw, 8 Nm
Sleeve
O-ring
Always replace
O-ring
Always replace
Screw, 8 Nm
Automatic transmission control valve assembly
Identification
Fig.
Disassemble
Chapter
Handslide valve
Fasten it so it does not escape when assembling the automatic transmission control valve assembly
O-ring
Always replace
Transmission case
Connector
For cable strand
Disassemble
Chapter
Couple when assembling it in the transmission case
O-ring
Always replace
To the harness connector
Harness
For the electric valves
Fig.1 - Change the locking screw retainer
Cut the retainer
arrow
with cutting pliers; always replace the retainer.
After the repair, thread the threaded plug with the new retainer manually to fill ATF
Fill ATF, check and correct the ATF level
Chapter
Fig.2 - Identification of the automatic transmission control valve assembly as of 07.99
The distinctive letters are marked in a plate
arrow
, which must always be attached to the corresponding automatic transmission control valve assembly.
Fig.3 - Assemble and disassemble the electric valve -N93-
Disassemble the screw
1
and remove the valve cable.
Disassemble the screws
arrows
.
Unplug the connector
2
.
Extract the valve -N93-.
Replace the O-ring.
The assembly is performed in the reverse order of operations.
1 - M6 x 35 mm, torque 8 Nm
M6 x 75 mm arrows, torque 8 Nm
Fig.4 - Disassemble and assemble the support plate with the electric valves -N88- to -N92-
Disassemble the electric valve -N93-
Fig.
Tightening torque
Item
,
Item
,
Item
Fig.5 - Disassemble and assemble the ATF sieve
Do not mix the screw
A
with the screw
B
and assemble them in the same location.
Tightening torque
Item
Assemble the supports
1
and
2
and the plate
3
as shown in the figure

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Workshop data on this page last updated 20 Sep 2026.