Shift Valve Housing & Accumulator Housing

NOTE: Ensure the utmost cleanliness at all times when working on the shift valve body. Work should be performed on a plastic base as far as possible. Fuzzy cloths must not be used; chamois leathers are particularly suitable. After dismantling, all pans must be washed and blown dry with compressed air.





Removing and Installing





1. Unscrew oil drain plug (4a) and allow oil to drain.
2. Unscrew retaining bolts (4) and remove oil pan (3).
3. Remove oil filter.





4. Set selector lever to "P".
5. Unscrew retaining bolts (7) and remove shift valve housing (A).

Installation Note
The three bolts (7a) are 50 mm, the others are 55 mm long. Tightening torque 8 Nm.





Ensure that the range selector valve (A1) engages in the driver (arrow).

6. Unscrew bolts (arrows). Remove valves (13, 24, 86) and strainer (33a).
7. Hold shift valve body (A) and damper housing (B) together and turn over.





A Shift valve housing
B Damper housing
1 Selector valve
13 Reed-type check valve with bore
24 Check valve, primary pump (not used any more after the omission of be secondary pump)
33a Strainer, shift valve B2
46 Plunger regulating valve, control pressure
86 Drain valve LB3

Installation Note
Only tighten bolts (arrows) slightly so that both housing sections can still be adjusted against each other, as far as the bolts permit. Insert valves (13, 24. 86) and strainer (33a) in shift valve body.





8. Carefully lift off damper housing (B) together with intermediate plate (4).





A Shift valve body
A1 Selector valve
7 Shut-off valve K1
9 Check valve without bore
14 Valve balls (17 or 18 each)
14a Valve ball, cut-in damper "R" omitted as from transmission no. 3 747 000
15 Pressure Valve
35 Shift pin, lubricating pressure
54 check valve
81 Strainer filter
87 Throttle valve K2

9. Remove all 18 or 17 valve balls (14). The valve ball marked 14 is located on a tapered spring.
10. Takeout valves. filter and shift pin.
11. If necessary. unscrew side covers from shift valve body, check plungers and valves for smooth running and swarf.





1 selector valve
3 Plunger, command valve 2-3
4 Command valve 2-3
5 Control valve, converter adaptation
7 Shut off valve K1
10 Shift valve B1
11 Plunger, command valve 3-4
12 Command valve 3-4
16 Control valve, basic pressure
17 Command valve 1-2
18 Sleeve, command valve 1 - 2
19 Plunger, command valve I - 2
26 Control valve, working pressure
27 Plug, shift valve, bridging clutch
32 Control valve, full throttle
33 Shift valve B2
35 Shift pin, lubricating pressure
38 Control valve B1
39 Plunger, control valve B1
40 Shift valve, kickdown
41 Shift valve, governor pressure
44 Booster valve, governor pressure
45 Control valve, control pressure
46 Plunger, control valve, control pressure

12. If necessary, unscrew side covers from shift valve body, check plungers and valves for smooth running and swarf.





25 Vacuum (modulating pressure)
47 Control valve, shift pressure
48 Damper K1
49 Damper K2
50 Control valve, damper K1.
51 Control valve, damper K2
52 Damper B1
53 Damper switching on
55 Shut-off valve RV2
56 Shift valve, sliding gearshift
57 Control valve, damper B1
58 Control valve, damper switching on (inoperative as of transmission no. 3 447 000)
59 shift valve K2
60 Detent valve B2
61 Shut-off valve, brake circuit
62 Shut-off valve, RV1
63 Damper, kickdown
64 Lubricating pressure valve
85 Pressure limiting valve

Installation Note





Depending on the model of transmission or vehicle, the springs are installed either in front of or behind the valve. For this reason. the sequence of valves and springs must be noted when dismantling the shift valve housing or the damper housing.

13. The arrow indicates the location of the hexagon socket screw for the full-throttle control pressure. Rotating the screw clockwise produces earlier full throttle or kickdown upshifts. The opposite direction delays the upshifts.