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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 221 (Nag1 Automatic Transmission (Service Information)) >> Automatic Transmission Nag1 - Service Information >> Unit-ELECTROHYDRAULIC Control >> Disassembly >> ELECTROHYDRAULIC Unit

ELECTROHYDRAULIC Unit

WARNING: This page is about a different car, the 2008 Dodge Magnum, 2008 Dodge Charger, and 2008 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Electrohydraulic Unit Components
GC0012770Courtesy of CHRYSLER LLC
1 - SOLENOID CAP (if equipped)
2 - SOLENOID CAP (if equipped)
3 - BOLT - M6X32
4 - BOLT - M6X30
5 - LEAF SPRING
6 - MODULATING PRESSURE REGULATING SOLENOID VALVE
7 - SHIFT PRESSURE REGULATING SOLENOID
8 - 3-4 SHIFT SOLENOID
9 - TORQUE CONVERTER LOCK-UP SOLENOID
10 - 1-2/4-5 SHIFT SOLENOID
11 - 2-3 SHIFT SOLENOID
12 - ELECTRICAL CONTROL UNIT
13 - SHIFT PLATE
  1. Remove electrohydraulic unit from the vehicle. See REMOVAL .
  2. Remove solenoid caps (1, 2) if equipped.
  3. Unscrew Torx® socket bolts (3, 4).
    NOTE: Pay attention to the different lengths of the Torx® socket bolts.
  4. Remove leaf springs (5).
  5. Withdraw solenoid valves (6 - 11) from shift plate (13).
    NOTE: Check O-rings on solenoid valves for damage and replace if necessary.
  6. Bend away retaining lug on stiffening rib on transmission oil temperature sensor.
  7. Remove electrohydraulic control module (12) from the shift plate (13).
    Fig 2: Shift Valve Group Locations
    GC0012773Courtesy of CHRYSLER LLC
    A - OPERATING AND LUBRICATING PRESSURE REGULATING VALVES AND 2-3 OVERLAP VALVE
    B - 1-2/4-5 SHIFT GROUP AND SHIFT, SHIFT VALVE, AND REGULATING VALVE PRESSURE REGULATING VALVES
    C - 3-4 SHIFT GROUP
    D - 2-3 SHIFT GROUP, TCC LOCK-UP AND B2 REGULATING VALVES
  8. Note the locations of the major shift valve group components for assembly reference.
    1. A - Operating and Lubricating Pressure Regulating valves and 2-3 Overlap valve
    2. B - 1-2/4-5 Shift Group and Shift, Shift Valve, and Regulating Valve Pressure Regulating Valves
    3. C - 3-4 Shift Group
    4. D - 2-3 Shift Group, TCC Lock-up, and B2 Regulating Valves
    Fig 3: Shift Plate Components
    GC0012777Courtesy of CHRYSLER LLC
    1 - BOLTS - 29
    2 - VALVE HOUSING
    3 - SEALING PLATE
    4 - VALVE BODY
    5 - LEAF SPRING
    NOTE: Pay great attention to cleanliness for all work on the shift plate. Fluffy cloths must not be used. Leather cloths are particularly good. After dismantling, all parts must be washed and blown out with compressed-air, noting that parts may be blown away.
  9. Unbolt leaf spring (5).
  10. Unscrew Torx® bolts (1).
  11. Remove valve housing (2) from valve body (4).
  12. Remove sealing plate (3).
    Fig 4: Solenoid Valve Strainer Locations
    GC0012772Courtesy of CHRYSLER LLC
    1 - SOLENOID VALVE STRAINERS
  13. Remove the strainers (1) for the modulating pressure and shift pressure control solenoid valves from the valve housing. See Fig 4.
    Fig 5: Converter Lock-up Solenoid Valve Strainer Location
    GC0012775Courtesy of CHRYSLER LLC
    1 - CONVERTER LOCK-UP SOLENOID STRAINER
  14. Remove the strainer (1) in the inlet to torque converter lock-up control solenoid valve.
    Fig 6: Check Balls and Strainer Location
    GC0012776Courtesy of CHRYSLER LLC
    1 - STEEL CHECK BALLS
    2 - CENTRAL STRAINER
    3 - STEEL CHECK BALLS
    4 - PLASTIC CHECK BALLS
    5 - PLAIN DOWEL PIN
    NOTE: A total of 12 valve balls are located in the valve body, four made from plastic (4) and eight from steel (1, 3).
  15. Note the location of all check balls (1, 3, 4) and the central strainer (2) for re-installation. Remove all check balls (1, 3, 4) and the central strainer (2).
    Fig 7: B2 Shift Valve, 2-3 Holding Pressure Shift Valve, 2-3 Command Valve, 2-3 Shift Pressure, TCC Damper Valve, TCC Lock-Up Regulator Valve & Side Cover
    GC0052805Courtesy of CHRYSLER LLC
    1 - B2 SHIFT VALVE 5 - TCC DAMPER VALVE - if equipped
    2 -2-3 HOLDING PRESSURE SHIFT VALVE 6 - TCC LOCK-UP REGULATOR VALVE
    3 - 2-3 COMMAND VALVE 7 - SIDE COVER
    4 - 2-3 SHIFT PRESSURE -
  16. Remove the screws holding the side cover (7) to the valve body and valve housing.
  17. Remove the B-2 Shift Valve assembly (1), 2-3 Holding Pressure Valve assembly (2), 2-3 Command Valve assembly (3), 2-3 Shift Pressure assembly (4), TCC Damper Valve (5) if equipped and the TCC Lock-Up Regulator Valve assembly (6) from the valve body.
  18. Check all valves for ease of movement and shavings.
    Fig 8: 1-2/4-5 Overlap Regulating Sleeve/Piston, Shift Pressure Regulating Valve, Control Valve Pressure Regulator, Shift Solenoid Pressure Regulating Valve & Side Cover
    GC0052806Courtesy of CHRYSLER LLC
    1 - 1-2 / 4-5 OVERLAP REGULATING SLEEVE AND PISTON 4 - SHIFT SOLENOID PRESSURE REGULATING VALVE
    2 - SHIFT PRESSURE REGULATING VALVE 5 - SIDE COVER
    3 - CONTROL VALVE PRESSURE REGULATOR -
  19. Remove the screws holding the side cover (5) to the valve body and valve housing.
  20. Remove the 1-2 / 4-5 Overlap Regulating Valve, Sleeve, and Piston assembly (1), Shift Pressure Regulating Valve assembly (2), Control Valve Pressure Regulator assembly (3), and the Shift Solenoid Pressure Regulating Valve (4) from the valve body.
  21. Check all valves for ease of movement and shavings.
    Fig 9: 1-2/4-5 Command Valve, 1-2/4-5 Holding Pressure Shift, 1-2/4-5 Shift Pressure Shift Valve & Side Cover
    GC0052807Courtesy of CHRYSLER LLC
    1 - 1-2 / 4-5 COMMAND VALVE 3 - 1-2 / 4-5 SHIFT PRESSURE
    2 - 1-2 / 4-5 HOLDING PRESSURE SHIFT VALVE 4 - SIDE COVER
  22. Remove the screws holding the side cover (4) to the valve body and valve housing.
  23. Remove the 1-2 / 4-5 Command valve assembly (1), 1-2 / 4-5 Holding Pressure Shift Valve (2) and the 1-2 / 4-5 Shift Pressure Shift Valve assembly (3) from the valve body.
  24. Check all valves for ease of movement and shavings.
    NOTE: The sleeves and pistons of the overlap regulating valves must not be mixed up.
    Fig 10: Selector Valve, 3-4 Holding Pressure Shift Valve, 3-4 Command Valve, 3-4 Shift Pressure, 3-4 Overlap Regulating Valve/Sleeve/Piston & Side Cover
    GC0052808Courtesy of CHRYSLER LLC
    1 - SELECTOR VALVE 4 - 3-4 SHIFT PRESSURE
    2 - 3-4 HOLDING PRESSURE SHIFT VALVE 5 - 3-4 OVERLAP REGULATING VALVE, SLEEVE, AND PISTON
    3 - 3-4 COMMAND VALVE 6 - SIDE COVER
  25. Remove the screws holding the side cover (6) to the valve body and valve housing.
  26. Remove the sector valve (1).
  27. Remove 3-4 Holding Pressure Shift Valve assembly (2), 3-4 Command Valve assembly (3), 3-4 Shift Pressure Shift Valve assembly (4) and the 3-4 Overlap Regulating Valve Sleeve and Piston assembly (5) from the valve body.
  28. Check all valves for ease of movement and shavings.
    Fig 11: Line Pressure Regulating Valve, Lubricating Pressure Regulating Valve, 2-3 Overlap Regulating Valve/Sleeve/Piston & Side Cover
    GC0052809Courtesy of CHRYSLER LLC
    1 - LINE PRESSURE REGULATING VALVE 3 - 2-3 OVERLAP REGULATING VALVE, SLEEVE, AND PISTON
    2 - LUBRICATING PRESSURE REGULATING VALVE 4 - SIDE COVER
  29. Remove the screws holding the side cover (4) to the valve body and valve housing.
  30. Remove the Line Pressure Regulating Valve assembly (1), Lubricating Pressure Regulating Valve assembly (2) and the 2-3 Overlap Regulating Valve, Sleeve and Piston assembly (3) from the valve body.
  31. Check all valves for ease of movement and shavings.
    Fig 12: Pressure Feed Valve Location
    GC0012774Courtesy of CHRYSLER LLC
    1 - PRESSURE FEED VALVE
  32. Remove the pressure supply valve (1) from the valve body.
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