2004 DAEWOO LACETTI aisin automatic transaxle

AISIN AUTOMATIC TRANSAXLE 5A2 – 197
DAEWOO V–121 BL4
Disassembly Procedure
1. Write down the relative position of the primary regu-
lator valve sleeve, plug and pin.
Notice : Because the line pressure is changed by the posi-
tion of the pin and groove in the sleeve end, be sure to
check the position.
2. Remove the manual valve.
3. Remove the 5 bolts and 5 shift solenoid valves.
4. Remove the 15 bolts.
5. Remove the cover, 2 gaskets and plate.

5A2 – 198IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
6. Remove the spring, check valve and check ball.
7. Remove the bolt, spring seat, spring and ball.
8. Turn over the valve body.
9. Remove the 2 bolts from the valve body.
10. Remove the upper valve body from the lower valve
body with plate.
11. Remove the valve body plate from the lower valve
body.
Notice : Be careful that the check balls do not fall out.

AISIN AUTOMATIC TRANSAXLE 5A2 – 199
DAEWOO V–121 BL4
Assembly Procedure
1. Install the valve body plate to the lower valve body.
2. Install the upper valve body to the lower valve body
with plate.
3. Install the 2 bolts to the valve body.
Tighten
Tighten the bolts to 11 NSm (97 lb–in).
Bolt A: 49 mm (1.93 in.)
Bolt B: 36 mm (1.42 in.)
4. Turn the valve body.
5. Install the check valve, spring and check ball.
6. Install the ball, spring, spring seat and bolt.
Tighten
Tighten the bolts to 6.5 NSm (57 lb–in).

5A2 – 200IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
7. Install the 2 gaskets, plate and lower valve body
cover.
8. First, tighten the bolts indicated by arrows tempo-
rarily and then tighten the other bolts temporarily.
9. Tighten all the bolts completely.
Tighten
Tighten the bolts to 11 NSm (97 lb–in).
S Bolt length:
Bolt A: 49 mm (1.93 in.)
Bolt B: 20 mm (0.79 in.)
Bolt C: 60 mm (2.36 in.)
10. Install the 5 shift solenoid valves with the 6 bolts.
Tighten
Tighten the bolts to 11 NSm (97 lb–in).
S Bolt length:
Bolt A: 49 mm (1.93 in.)
Bolt B: 20 mm (0.79 in.)
11. Install the manual valve.
12. Make sure that the primary regulator valve is posi-
tioned in the same place where it was removed.

AISIN AUTOMATIC TRANSAXLE 5A2 – 201
DAEWOO V–121 BL4
Upper Valve Body
1. Sleeve
2. Key
3. Spring
4. Plunger
5. Lock–up Control Valve
6. Plug
7. Key
8. Secondary Regulator Valve
9. Spring
10. No.2 Check Valve
11. Key
12. Ball
13. No.1 Check Valve
14. Reverse Control Valve
15. Spring
16. Key17. Plug
18. Spring
19. 3–4 Shift Valve
20. Spring
21. O–ring
22. Reverse Clutch Accumulator Piston
23. O–ring
24. Plunger
25. 3–4 Shift Timing Valve
26. Spring
27. O–ring
28. 2nd Brake Accumulator Piston
29. O–ring
30. Spring
31. Upper Valve Body Cover

5A2 – 202IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
Upper Valve Body Spring
S During reassembly, please refer to the spring specifications below to help you do discriminate between the differ-
ent springs.
MarkName (Color)Free length/Outer diameter mm
(in.)Total number of
coils
A3–4 shift timing valve (Pink)28.41 (1.1185) / 6.4 (0.252)10.49
B2nd brake accumulator piston,(None)
Inner45.90 (1.8071) / 10.5 (0.413)16.9
C2nd brake accumulator piston,(White)
Outer69.00 (2.7165) / 16.0 (0.630)15.1
DReverse clutch accumulator piston
(None)65.40(2.5748) / 17.0 (0.669)13.7
E3–4 shift valve (Red)25.50 (1.0039) / 9.73 (0.3831)7.75
FSecondary regulator valve (White)34.56 (1.3606) / 8.8 (0.346)12.27
GReverse control valve (None)25.58 (1.0071) / 8.64 (0.3402)8.75
HLock up control valve (Yellow)20.87 (0.8217) / 5.55 (0.2185)11.15

AISIN AUTOMATIC TRANSAXLE 5A2 – 203
DAEWOO V–121 BL4
Upper Valve Body Key
MarkRetainerHeight/Width/Thickness mm (in.)
ACheck valve11.5 (0.453) / 5.0 (0.197) / 3.2 (0.126)
BSecondary regulator valve16.0 (0.630) / 5.0 (0.197) / 3.2 (0.126)
CLock up control valve16.0 (0.630) / 5.0 (0.197) / 3.2 (0.126)
DReverse control valve11.5 (0.453) / 5.0 (0.197) / 3.2 (0.126)

5A2 – 204IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
Upper Valve Body Check Ball
Check ball mm(in).5.535 (0.21791)