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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 >> Assembly >> 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.
CAUTION: Make certain all valves and springs are assembled correctly. Failure to follow this caution may result in transmission failure.
NAG1 VALVE BODY SPRING DIMENSION 
VALVE  SPRING FREE LENGTH  TOTAL COILS 
2-3 Holding  18.8 -19.6 mm (0.74 - 0.77 in.) 12
T/C Clutch Damper  37.5 - 38.5 mm (1.48 - 1.51 in.) 19.5
1-2 / 4-5 Overlap  20.95 - 21.65 mm (0.82 - 0.85 In.) 14.5
Shift Pressure Regulator  22.4 - 23.6 mm (0.88 - 0.93 in.) 14.5
Control Valve Pressure Regulator  79.2 - 82.4 mm (3.12 - 3.24 in.) 29
Shift Solenoid Pressure Regulating Valve  32.6 - 34.4 mm (1.28 - 1.35 in.) 15.5
T/C Clutch (LU) Regulator  22.8 - 23.6 mm (0.90 - 0.93 in.) 18.5
B2 Shift Valve  25.8 - 27.0 mm (1.01 - 1.06 in.) 16.5
3/4 Over Lap  21.0 - 20.4 mm (0.83 - 0.80 in.) 13
3-4 Holding, 1-2 / 4-5 Holding, 1-2 / 4-5 Shift Pressure  21.1 - 22.5 mm (0.83 - 0.88 in.) 14
3-4 Command, 3-4 Shift Pressure, 1-2 / 4-5 Command, 2-3 Shift Pressure, 2-3 Command  23.9 - 25.3 mm (0.94 -1.00 in.) 11.5
Lubricating Pressure Regulating Valve  64.8 - 68.2 mm (2.55 - 2.68 in.) 24
2-3 Overlap  16.9 - 18.7 mm (0.66 - 0.74 in.) 13
Line Pressure Regulator  43.8 - 46.2 mm (1.72 - 1.82 in.) 13.5
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.
Fig 1: Pressure Feed Valve Location
GC0012774Courtesy of CHRYSLER LLC
1 - PRESSURE FEED VALVE
  1. Install the pressure supply valve (1) into the valve body. See Fig 1.
    NAG1 VALVE BODY SPRING DIMENSION 
    VALVE  SPRING FREE LENGTH  TOTAL COILS 
    2-3 Holding (2)  18.8 -19.6 mm (0.74 - 0.77 in.) 12
    T/C Clutch Damper (5)  37.5 - 38.5 mm (1.48 - 1.51 in.) 19.5
    T/C Clutch (LU) Regulator (6)  22.8 - 23.6 mm (0.90 - 0.93 in.) 18.5
    B2 Shift Valve (1)  25.8 - 27.0 mm (1.01 - 1.06 in.) 16.5
    2-3 Shift Pressure (4), 2-3 Command (3)  23.9 - 25.3 mm (0.94 -1.00 in.) 11.5
    Fig 2: 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 -
  2. Lubricate and install the B-2 Shift Valve assembly (1), 2-3 Holding Pressure Valve assembly (2), 2-3 Command Valve assembly (3), 2-3 Shift Pressure Shift Valve assembly (4), TCC Damper Valve (5) if equipped and the T/CC Lock-Up Regulator Valve assembly (6) into the valve body.
  3. Install the side cover and the screws holding the side cover (7) to the valve body and valve housing. Tighten the screws to 4 N.m (35 in.lbs.).
    NAG1 VALVE BODY SPRING DIMENSION 
    VALVE  SPRING FREE LENGTH  TOTAL COILS 
    1-2 / 4-5 Overlap (1)  20.95 - 21.65 mm (0.82 - 0.85 In.) 14.5
    Shift Pressure Regulator (2)  22.4 - 23.6 mm (0.88 - 0.93 in.) 14.5
    Control Valve Pressure Regulator (3)  79.2 - 82.4 mm (3.12 - 3.24 in.) 29
    Shift Solenoid Pressure Regulating Valve (4)  32.6 - 34.4 mm (1.28 - 1.35 in.) 15.5
    Fig 3: 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 -
  4. Lubricate and install the 1-2 / 4-5 Overlap Regulating Valve, Sleeve, and Piston assembly (1), Shift Pressure Regulating Valve assembly (2), Control Valve Pressure Regulator Valve assembly (3) and Shift Solenoid Pressure Regulating Valve assembly (4) into the valve body.
  5. Install the side cover and the screws holding the side cover (5) to the valve body and valve housing. Tighten the screws to 4 N.m (35 in.lbs.).
    NAG1 VALVE BODY SPRING DIMENSION 
    VALVE  SPRING FREE LENGTH  TOTAL COILS 
    1-2 / 4-5 Holding (2), 1-2 / 4-5 Shift Pressure (3)  21.1 - 22.5 mm (0.83 - 0.88 in.) 14
    1-2 / 4-5 Command (1)  23.9 - 25.3 mm (0.94 -1.00 in.) 11.5
    Fig 4: 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
  6. Lubricate and install 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 assembly (3) into the valve body.
  7. Install the side cover and the screws holding the side cover (4) to the valve body and valve housing. Tighten the screws to 4 N.m (35 in.lbs.).
    NAG1 VALVE BODY SPRING DIMENSION 
    VALVE  SPRING FREE LENGTH  TOTAL COILS 
    3/4 Over Lap (5)  20.4 - 21.0 mm (0.80 - 0.83 in.) 13
    3-4 Holding (2)  21.1 - 22.5 mm (0.83 - 0.88 in.) 14
    3-4 Command (3), 3-4 Shift Pressure (4)  23.9 - 25.3 mm (0.94 -1.00 in.) 11.5
    Fig 5: 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
  8. Lubricate and install the sector valve (1).
  9. Lubricate and install 3-4 Holding Pressure Shift Valve assembly (2), 3-4 Command Valve assembly (3), 3-4 Shift Pressure assembly (4) and the 3-4 Overlap Regulating Valve Sleeve and Piston assembly (5) into the valve body.
  10. Install the side cover and the screws holding the side cover (6) to the valve body and valve housing. Tighten the screws to 4 N.m (35 in.lbs.).
    NAG1 VALVE BODY SPRING DIMENSION 
    VALVE  SPRING FREE LENGTH  TOTAL COILS 
    Lubricating Pressure Regulating Valve (2)  64.8 - 68.2 mm (2.55 - 2.68 in.) 24
    2-3 Overlap (3)  16.9 - 18.7 mm (0.66 - 0.74 in.) 13
    Line Pressure Regulator (1)  43.8 - 46.2 mm (1.72 - 1.82 in.) 13.5
    Fig 6: 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
  11. Lubricate and install the Operating Pressure Regulating Valve assembly (1), Lubricating Pressure Regulating Valve assembly (2) and the 2-3 Overlap Regulating Valve, Sleeve and Piston assembly (3) into the valve body.
  12. Install the side cover and the screws holding the side cover (6) to the valve body and valve housing. Tighten the screws to 4 N.m (35 in.lbs.).
    Fig 7: 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).
  13. Install all check balls (1, 3, 4) and the central strainer (2). See Fig 7.
    Fig 8: Converter Lock-up Solenoid Valve Strainer Location
    GC0012775Courtesy of CHRYSLER LLC
    1 - CONVERTER LOCK-UP SOLENOID STRAINER
  14. Install the strainer (1) in the inlet to torque converter lock-up control solenoid valve. See Fig 8.
    Fig 9: Shift Plate Components
    GC0012777Courtesy of CHRYSLER LLC
    1 - BOLTS - 29
    2 - VALVE HOUSING
    3 - SEALING PLATE
    4 - VALVE BODY
    5 - LEAF SPRING
  15. Position the sealing plate (3) onto the valve body (4). See Fig 9.
  16. Install the valve housing (2) onto the valve body (4) and sealing plate (3).
  17. Install the shift plate Torx® bolts (1). See Fig 9. Tighten the bolts to 8 N.m (71 in.lbs.).
  18. Install leaf spring (5). See Fig 9.
    Fig 10: Solenoid Valve Strainer Locations
    GC0012772Courtesy of CHRYSLER LLC
    1 - SOLENOID VALVE STRAINERS
  19. Install the strainers (1) for the modulating pressure and shift pressure control solenoid valves into the valve housing. See Fig 10.
    Fig 11: 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
  20. Install the electrohydraulic control module (12) onto the shift plate (13). See Fig 11.
  21. Bend the retaining lug on stiffening rib on transmission oil temperature sensor to retain the electrohydraulic control module.
  22. Install the solenoid valves (6 - 11) into shift plate (13).
    NOTE: Check O-rings on solenoid valves for damage and replace if necessary.
  23. Install the leaf springs (5).
  24. Install the Torx® socket bolts (3, 4). See Fig 11. Tighten the bolts to 8 N.m (71 in.lbs.).
    NOTE: Pay attention to the different lengths of the Torx® socket bolts.
  25. Install the solenoid caps (1, 2) if equipped.
  26. Install the electrohydraulic unit into the vehicle.
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