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Home >> Acura >> 2012 >> MDX >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission >> Transmission Reassembly >> Special Tools Required

Special Tools Required

NOTE:
  • Refer to the Exploded View in the Transmission Disassembly as needed during the following procedure.
  • Apply a light coat of clean ATF on all tubes, O-rings, and moving parts before reassembly.
  1. Make sure that the ATF magnet is cleaned and installed in the torque converter housing. Clean and install the ATF magnet, if necessary.
  2. Install the 2nd air check valve and the 5th air check valve in the torque converter housing.
  3. Install the main separator plate and the two dowel pins on the torque converter housing. Then install the ATF pump drive gear (A), the driven gear (B), and the ATF pump driven gear shaft (C). Install the ATF pump driven gear with its grooved and chamfered side facing down.
    Fig 1: Locating ATF Pump Drive Gear, Driven Gear And ATF Pump Driven Gear Shaft
    G08057705Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Install the main valve body (eight bolts). Make sure the ATF pump drive gear (A) rotates smoothly in the normal operating direction, and the ATF pump driven gear shaft (B) moves smoothly in the axial and normal operating direction.
    Fig 2: Checking ATF Pump Drive Gear Rotates Smoothly In Normal Operating Direction
    G08057706Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. If the ATF pump drive gear and ATF pump driven gear shaft do not move smoothly, loosen the main valve body bolts. Realign the ATF pump driven gear shaft, and retighten the bolts to the specified torques, then recheck. Failure to align the ATF pump driven gear shaft correctly will result in a seized ATF pump drive gear or ATF pump driven gear shaft.
  6. Install the two check balls in the main valve body.
  7. Install the regulator separator plate and the two dowel pins on the main valve body, and install the regulator valve body (eight bolts).
  8. Install the manual separator plate and the two dowel pins on the main valve body, and install the manual valve body (seven bolts).
  9. Install the 4th/reverse air check valve in the main valve body.
  10. Install the two dowel pins on the main valve body.
  11. Install the stator shaft with new O-rings (three), and install the stator shaft support (four bolts).
  12. Install the 3rd air check valve and the 6th air check valve in the stator shaft support.
  13. Install the stator shaft stop in the torque converter housing.
  14. Install the cooler retainer cap.
  15. Install the transfer output shaft (A) in the torque converter housing, and install the thrust shim (B) on the top of the transfer output shaft.
    Fig 3: Locating Transfer Output Shaft, Thrust Shim And Differential Assembly
    G08057707Courtesy of AMERICAN HONDA MOTOR CO., INC.
  16. Install the differential assembly (C) in the torque converter housing.
  17. Install the third shaft (D) into the main valve body.
  18. Install the selector control shaft (E).
  19. Align the control lever pin (A) with the manual valve guide (B).
    Fig 4: Aligning Control Lever Pin With Manual Valve Guide
    G08057708Courtesy of AMERICAN HONDA MOTOR CO., INC.
  20. Hook the detent spring (A) to the detent arm (B) and the selector control shaft (C), then install the detent arm and the detent arm shaft (D) into the torque converter housing.
    Fig 5: Locating Detent Spring, Detent Arm, Selector Control Shaft And Detent Arm Shaft
    G08057709Courtesy of AMERICAN HONDA MOTOR CO., INC.
  21. Install the parking holder (A).
    Fig 6: Locating Parking Holder And Bolts With Torque Specifications
    G08057710Courtesy of AMERICAN HONDA MOTOR CO., INC.
  22. Assemble the mainshaft, the countershaft, the secondary shaft and the idler gear shaft.
  23. Install the thrust needle bearing (A) on the secondary shaft bearing in the torque converter housing.
    Fig 7: Identifying Torque Converter Housing Shaft Sub-Assembly
    G08057711Courtesy of AMERICAN HONDA MOTOR CO., INC.
  24. Join the mainshaft subassembly (B), the countershaft subassembly (C), the secondary shaft subassembly (D), and the idler gear shaft subassembly (E) together, and install them in the torque converter housing. Install the 27.5 x 41 x 2.5 mm thrust needle bearing (F) and the 41.5 mm washer (G) on the top of the idler gear shaft.
  25. Turn the shift fork shaft (A) so the large chamfered hole is facing the fork bolt hole of the shift fork.
    Fig 8: Locating Shift Fork Shaft, Baffle Plate, Shift Fork, Reverse Gear And Selector Hub With Torque Specifications
    G08057712Courtesy of AMERICAN HONDA MOTOR CO., INC.
  26. Install the baffle plate (B), the shift fork (C), the reverse selector hub (D), and the reverse gear (E) together.
  27. Secure the shift fork (A) to the shift fork shaft with the lock bolt (B) and a new lock washer (C), then bend the lock tab of the lock washer against the bolt head.
    Fig 9: Locating Shift Fork, Lock Bolt And Lock Washer With Torque Specifications
    G08057713Courtesy of AMERICAN HONDA MOTOR CO., INC.
  28. Install the lubrication pipe (A) and the 10 x 70 mm ATF feed pipe (B) into the regulator valve body (C).
    Fig 10: Locating Lubrication Pipe, 10 x 70 mm ATF Feed Pipe And Regulator Valve Body With Torque Specifications
    G08057714Courtesy of AMERICAN HONDA MOTOR CO., INC.
  29. Install the ATF strainer (D) with a new O-ring.
  30. Install new O-rings (A) (four) on the joint pipes (B) (two), and install the joint pipes into the manual valve body (C) and the torque converter housing (D).
    Fig 11: Locating O-Rings, Joint Pipes, Manual Valve Body And Torque Converter Housing
    G08057715Courtesy of AMERICAN HONDA MOTOR CO., INC.
  31. Install the two dowel pins (C) and a new gasket (D) on the torque converter housing (E).
    Fig 12: Locating Dowel Pins, Gasket And Torque Converter Housing With Torque Specifications
    G08057716Courtesy of AMERICAN HONDA MOTOR CO., INC.
  32. Install transmission hanger A and transmission hanger B in the transmission housing (F), then place the transmission housing on the torque converter housing.
  33. Wrap a screwdriver tip with tape to prevent damage to the reverse idler gear teeth. Engage the reverse idler gear with the reverse gears by rotating the idler gear using a screwdriver.
    Fig 13: Rotating Idler Gear Using Screwdriver
    G08057717Courtesy of AMERICAN HONDA MOTOR CO., INC.
  34. While expanding the snap ring of the countershaft bearing using snap ring pliers, install the transmission housing onto the bearing part-way. Then release snap ring pliers, and push down on the transmission housing until it bottoms and snap ring snaps into place in the countershaft bearing snap ring groove.
    Fig 14: Expanding Snap Ring Of Countershaft Bearing Using Snap Ring Pliers
    G08057718Courtesy of AMERICAN HONDA MOTOR CO., INC.
  35. Install the transmission housing mounting bolts along with transmission hanger C, and tighten the bolts in at least two steps in a criss-cross pattern to the specified torque.
    Fig 15: Transmission Housing Mounting Bolts With Torque Specifications
    G08057719Courtesy of AMERICAN HONDA MOTOR CO., INC.
  36. Install the mainshaft holder onto the mainshaft.
    Fig 16: Installing Mainshaft Holder Onto Mainshaft
    G08057720Courtesy of AMERICAN HONDA MOTOR CO., INC.
  37. With a 6.0 mm wrench, turn the selector control shaft fully counterclockwise (viewed from the shaft end) to the P position.
    Fig 17: Turning Selector Control Shaft N Position To P Position
    G08057721Courtesy of AMERICAN HONDA MOTOR CO., INC.
  38. Install new lock washers (A) with the marked side (B) up over the mainshaft (C), and the third shaft (D), and apply ATF to surfaces of the lock washers and the old locknuts (E).
    Fig 18: Locating Lock Washers, Marked Side, Mainshaft, Third Shaft And Locknuts With Torque Specifications
    G08057722Courtesy of AMERICAN HONDA MOTOR CO., INC.
  39. Install the old locknuts, and tighten them to seat the lock washers to the specified torque, then remove the old locknuts.
    NOTE: The third shaft locknut has left-hand threads.
  40. Install new locknuts, and tighten them to the specified torque, then stake the locknuts to a depth (A) of 0.7-1.3 mm (0.03-0.05 in) using a 3.5 mm punch (B).
    NOTE:
    • Do not rotate the locknuts in the reverse direction after the locknuts are seated to the lock washers.
    • The third shaft locknut has left-hand threads.
    Fig 19: Staking Locknuts To Depth Of 0.7-1.3 mm (0.03-0.05 in) Using 3.5 mm Punch With Torque Specifications
    G08057723Courtesy of AMERICAN HONDA MOTOR CO., INC.
  41. Install a new O-ring (A) on the mainshaft end cover (B), and install the mainshaft end cover. Install a new O-ring (C) on the third shaft end cover (D), and install the third shaft end cover and the ATF filter bracket (E).
    Fig 20: Locating O-Ring, Mainshaft End Cover, Third Shaft End Cover And ATF Filter Bracket With Torque Specifications
    G08057724Courtesy of AMERICAN HONDA MOTOR CO., INC.
  42. Install new O-rings (F) on the end covers (G), and install the end covers.
  43. Apply ATF to new O-rings (A), and install the O-rings over the ATF pipes (B). Then install the ATF pipes with the filter ends (C) facing the secondary valve body (D) into the transmission.
    Fig 21: Locating O-Rings, ATF Pipes, Filter Ends And Secondary Valve Body With Torque Specifications
    G08057725Courtesy of AMERICAN HONDA MOTOR CO., INC.
  44. Install a new gasket (E) on the transmission housing. Install the secondary valve body while aligning the ATF pipes with the pipe holes on the secondary valve body, and secure the valve body with the bolts.
  45. Install new O-rings (A) on the shift solenoid valve C (B), and install the shift solenoid valve C.
    Fig 22: Locating O-Rings And Shift Solenoid Valve C With Torque Specifications
    G08057726Courtesy of AMERICAN HONDA MOTOR CO., INC.
  46. Install transmission fluid pressure switch C (4th clutch) (C) with a new sealing washer (D). Tighten the switch by gripping the metal part, not the plastic part.
  47. Install transmission fluid pressure switch A (2nd clutch) with a new sealing washer (B). Tighten the switch by gripping the metal part, not the plastic part.
    Fig 23: Locating Transmission Fluid Pressure Switch A (2nd Clutch) And Sealing Washer With Torque Specifications
    G08057727Courtesy of AMERICAN HONDA MOTOR CO., INC.
  48. Install transmission fluid pressure switch D (5th clutch) with a new sealing washer (C). Tighten the switch by gripping the metal part, not the plastic part.
  49. Install the ATF outlet line (A), and secure it with the banjo bolt (B) and new sealing washers (C), then secure the ATF outlet line with the bracket bolt.
    Fig 24: Locating ATF Outlet Line, Banjo Bolt And Sealing Washers With Torque Specifications
    G08057728Courtesy of AMERICAN HONDA MOTOR CO., INC.
  50. Install the ATF inlet line/ATF hose/ATF filter (D), and secure it with the banjo bolt (E) and new sealing washers (F), then secure the ATF inlet line with the bracket bolt.
  51. Put the ATF filter (G) on ATF filter bracket (H), and secure it with the ATF filter holder (I) and the bolt.
  52. Install a new O-ring (A) on the ATF temperature sensor (B), and install the ATF temperature sensor.
    Fig 25: Locating O-Ring And ATF Temperature Sensor With Torque Specifications
    G08057729Courtesy of AMERICAN HONDA MOTOR CO., INC.
  53. Install a new O-ring (A) on the input shaft (mainshaft) speed sensor (B), and install the input shaft (mainshaft) speed sensor.
    Fig 26: Locating O-Ring And Input Shaft (Mainshaft) Speed Sensor With Torque Specifications
    G08057730Courtesy of AMERICAN HONDA MOTOR CO., INC.
  54. Install a new O-ring (C) on the output shaft (countershaft) speed sensor (D), and install the output shaft (countershaft) speed sensor.
  55. Install the control lever (A) over the selector control shaft (B). Secure the control lever with the new lock washer (C) and the bolt, then bend the lock tab of the lock washer against the bolt head.
    Fig 27: Locating Control Lever, Selector Control Shaft, Lock Washer And Bolt With Torque Specifications
    G08057731Courtesy of AMERICAN HONDA MOTOR CO., INC.
  56. Shift the transmission into the N position by rotating the control lever from the P position. Do not use the control shaft to adjust the shift position. If the selector control shaft tips are squeezed together, it will cause a faulty signal or position due to play between the control shaft and the transmission range switch.
    Fig 28: Rotating Control Lever From P Position To N Position
    G08057732Courtesy of AMERICAN HONDA MOTOR CO., INC.
  57. Align the cutouts (A) on the rotary-frame with the N positioning cutouts (B) on the transmission range switch (C), then put a 2.0 mm (0.08 in) feeler gauge blade (D) in the cutouts to hold the switch in the N position.
    NOTE: Be sure to use a 2.0 mm (0.08 in) blade or equivalent to hold the switch in the N position.
    Fig 29: Aligning Cutouts On Rotary-Frame With N Positioning Cutouts On Transmission Range Switch
    G08057733Courtesy of AMERICAN HONDA MOTOR CO., INC.
  58. Install the transmission range switch (A) gently on the selector control shaft while holding it in the N position with the 2.0 mm (0.08 in) blade (B).
    Fig 30: Locating Transmission Range Switch And Blade With Torque Specifications
    G08057734Courtesy of AMERICAN HONDA MOTOR CO., INC.
  59. Tighten the bolts on the transmission range switch while you continue to hold the N position. Do not move the transmission range switch when tightening the bolts. Remove the feeler gauge.
  60. Install the ATF dipstick guide tubes (A) with new O-rings (B).
    Fig 31: Locating ATF Dipstick Guide Tubes, O-Rings And ATF Dipstick With Torque Specifications
    G08057735Courtesy of AMERICAN HONDA MOTOR CO., INC.
  61. Install the ATF dipstick (C) in the guide tube.
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