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HOMESERVICE MANUALSFORD1987ECONOLINE E250, VAN WINDOW EXTENDED, 4.9 YREPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSDIAGNOSIS & OVERHAUL - C6TRANSMISSION DISASSEMBLY
1987 Ford Econoline E250, Van Window Extended, 4.9 Y

Transmission Disassembly

1987 Ford Econoline E250, Van Window Extended, 4.9 YSECTION Transmission Disassembly
  1. With transmission in a holding fixture, remove oil pan and gasket. Remove retaining bolts and lift valve body assembly from transmission case.
  2. Attach a dial indicator to front pump with indicator contact against input shaft. Install oil seal replacing tool (T61L-7657-B) in extension housing to center output shaft. See Fig 1.
  3. Check transmission end play as follows: Push gear train to rear of case. Press input shaft inward until bottomed. Zero dial indicator.
  4. Push gear train forward. Read and record end play for reference at reassembly. Compare reading with specifications. See TRANSMISSION END PLAY SPECIFICATIONS  table. Remove checking tools from transmission.
    Fig 1: Checking Torque Converter Turbine & Stator End Play
    G92H14024Courtesy of FORD MOTOR CO.
    TRANSMISSION END PLAY SPECIFICATIONS

    Application In. (mm)
    C-6 .008-.044 (.21-1.12)
  5. Remove vacuum diaphragm, rod and primary throttle valve from case. Slide input shaft from front pump. Remove front pump retaining bolts, pry gear train forward and remove pump.
  6. Loosen band adjusting screw and remove 2 band struts. Rotate band 90° counterclockwise to align band ends with slot in case. Remove band from reverse-high clutch drum.
  7. Remove forward part of gear train from transmission as an assembly. See Fig 2. Remove servo cover retaining bolts, servo cover, piston, spring and gasket from case. Remove large snap ring securing reverse planet carrier in low-reverse clutch hub.
    Fig 2: Removing Reverse-High Clutch Drum
    G92I14025Courtesy of FORD MOTOR CO.
  8. Lift carrier from drum. Remove snap ring securing reverse ring gear and hub on output shaft and slide assembly from shaft. Rotate low-reverse hub in clockwise direction and remove from case.
  9. Remove reverse clutch snap ring and withdraw clutch discs, plates and pressure plate from case. Remove extension housing retaining bolts and vent tube from case.
  10. Remove extension housing and gasket. Slide output shaft assembly from case. Remove distributor sleeve retaining bolts. Remove sleeve, parking pawl gear and thrust washer.
    NOTE: If thrust washer is staked in place, use a sharp chisel and cut off metal from behind thrust washer. Remove any metal particles from case.
  11. Compress reverse clutch piston release spring. Remove snap ring and lift out springs and retainer assembly.
  12. Remove one-way clutch inner race retaining bolts from rear of case and remove inner race. Remove reverse clutch piston by applying air pressure to low-reverse apply passage in case.
    NOTE: See Figure for location of low-reverse apply passage.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.