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Ford

4R55E Transmission

Tech Resources View all Transmissions
Remanufactured Valve Body

Required

4R55E Remanufactured Valve Body F055

4R55E
Remanufactured Valve Body F055

’95–’96

Internal
Zip Kits

Center Support/Forward Clutch Sleeve 56219-03K

1996 & Later bushing style supports

    Helps cure:
  • Delayed Forward
  • Burnt Forward clutch
  • Damaged center support rings
Zip Kits

Pinion Needle Roller 56412-03

Fits units with .334" dia. pins only.

    Helps cure:
  • Lost or damaged component
Zip Kits

Pinion Pin 56412-02

Fits units with .334" dia. pins only.

    Helps cure:
  • Lost or damaged component
Zip Kits

Pinion Washer 56582E-W

Fits .310" dia. pinion pins.

  • Material: Bronze
  • Thickness: 0.020"
    Helps cure:
  • Lost or damaged component
Zip Kits

Pinion Washer 56412-04

Fits units with .334" dia. pins only.

    Helps cure:
  • Lost or damaged component
Zip Kits

Planetary Rebuild Kit 56412RK

Fits units with .334" dia. pins only.

    Helps cure:
  • Lost or damaged component
Zip Kits

Thrust Bearing 56241

See part page for fitment details.

  • Bearing Style: Enclosed
  • Material: Hardened Steel
  • Outer Dia.: 2.749"
  • Thickness: 0.106"
  • Inner Dia.: 2.082"
    Helps cure:
  • Bearing noise
  • Bearing failure
Pump
Zip Kits

Bell Housing/Pump Cover Bushing 56001X

Bell housing

  • Material: Bimetal
  • Bushing Style: Finish-in-Place
  • Housing Bore: 1.741"
  • Shaft Dia.: 1.615"
  • Width: 0.630"
    Helps cure:
  • Repeat front seal leakage
  • Worn pump bushing
  • Worn converter hub
Valve Body
Zip Kits

Boost Valve Kit 37947-03K

Increased Ratio

    Helps cure:
  • Delayed Reverse
  • Soft shifts
  • Low line pressure
  • Poor modulator control
Zip Kits

Boost Valve Kit 37947-01K

OE Ratio

    Helps cure:
  • Delayed Reverse
  • Soft shifts
  • Low line pressure
  • Poor modulator control
Zip Kits

Checkball 10000-08

Imidized Plastic, .250" Dia.

  • Material: Imidized Plastic
  • Dia.: 0.250"
    Helps cure:
  • Lost or damaged component
Zip Kits

EPC & Engagement Control Kit 37947-11K

    Helps cure:
  • 2nd Gear starts
  • Flare on 1-2 or 2-3 shift on 4R, or 2-3, 3-4 on a 5R
  • No Reverse
  • Poor shift quality
  • Delayed Forward
  • TCC slip
  • Code P0741
Zip Kits

EPC & TCC Relief Valve Kit 37947-40K

Fits either of two locations.

    Helps cure:
  • Code P0741
  • Flare shifts
  • TCC slip
  • Low EPC pressure
  • Low maximum line pressure
Zip Kits

Elevated Pressure Main Pressure Regulator Spring 56947-17

    Helps cure:
  • Soft shifts
  • Poor shift quality
  • Low base line pressure
Zip Kits

Inner Reverse Modulator Valve 37947-53

OE Size

    Helps cure:
  • Delayed Reverse
  • Burnt Reverse band
  • Direct clutch burned
  • No Reverse
Zip Kits

O-Ringed End Plug & Checkball Kit 37947-13K

    Helps cure:
  • Gear ratio & solenoid codes
  • Erratic shifts
  • No 3rd when hot
  • No 4th when hot
  • Shift timing change with temperature
Zip Kits

Outer Reverse Modulator Valve 37947-52

OE Size

    Helps cure:
  • Delayed Reverse
  • Burnt Reverse band
  • Direct clutch burned
  • No Reverse
Zip Kits

Oversized Coast Clutch Valve Kit 37947-33K

    Helps cure:
  • No engine braking in D3 to low
  • No 4th (4R44E/55E)
  • No 2nd (5R44E/55E)
  • No 5th (5R44E/55E)
  • No coast clutch apply
Zip Kits

Oversized Solenoid Regulator Valve Kit 37947-48K

    Helps cure:
  • Wrong gear starts
  • Solenoid performance codes
  • TCC codes & concerns
  • Harsh shifts
  • Soft shifts
  • Burnt TCC apply components
  • Burnt clutches
Zip Kits

Pressure Regulator Sleeve Kit 37947-05K

    Helps cure:
  • Delayed engagement
  • Poor shift quality
  • Low line pressure
  • High line pressure
  • Overheating
  • Low cooler flow at idle
Zip Kits

Pressure Regulator Valve 37947-54

OE Size

    Helps cure:
  • Delayed engagement
  • Low line pressure
  • High line pressure
  • Overheating
  • Low cooler flow at idle
Zip Kits

Relief Valve 10000-02K

High radius

  • Material: Steel
    Helps cure:
  • Pressure loss
  • Converter drain back
Zip Kits

Retaining Pin 56947-11

  • Length: 0.650"
  • Dia.: 0.072"
    Helps cure:
  • Lost or damaged component
Zip Kits

TCC Modulator Sleeve Kit 37947-07K

    Helps cure:
  • Code 1741
  • No lockup
  • Engine stall on FWD engagement
  • Poor converter fill & delayed engagements
  • Low cooler flow
Zip Kits

TCC Regulator Sleeve Kit 37947-09K

    Helps cure:
  • Code 628, 1741
  • TCC apply concerns
  • TCC cycling
  • TCC surge
  • High TCC slip RPM
  • Overheated fluid
  • Overheated converter
Zip Kits

TCC Regulator Valve 37947-38

OE size

    Helps cure:
  • Lost, damaged or modified original valve
  • Code 628, 1741
  • TCC apply concerns
Zip Kits

TCC Regulator Valve Spring Kit 37947-46K

    Helps cure:
  • Code P0741
  • Low TCC apply pressure
  • Low spring rate on 2.3L TCC regulator valve
  • Damaged valve body casting
Zip Kits

Zip Kit® 4R44E-5R55E-ZIP

    Helps cure:
  • Gear ratio & solenoid codes
  • Low line rise
  • Soft shifts
  • Erratic shifts
  • No 3rd when hot
  • No 4th when hot
  • 2nd Gear starts
  • Delayed Forward
  • TCC apply concerns
Case
Zip Kits

Shift Lever Case Bore Repair Sleeve 56361-01K

    Helps cure:
  • Manual valve moves out of position
  • Leaking manual shaft case seal
Servo/Band
Zip Kits

Reverse Servo Sleeve Kit 56532-01K

    Helps cure:
  • Reverse band failure
  • Rear servo bore wear
  • Forward clutch failure
  • Delayed Forward clutch
Other
Zip Kits

Crankshaft Spacer 56000-CS6

  • Material: Steel
  • Bolt Holes: 6
  • Outer Dia.: 2.972"
  • Inner Dia.: 0.751"
  • Thickness: 0.875"
    Helps cure:
  • Vibration
  • Front pump/converter seal leaks
  • Worn crankshaft spacer
  • Cracked crankshaft spacer
  • Cracked flywheel
  • Converter misalignment
Zip Kits

Crankshaft Spacer 56000-CS8

  • Material: Steel
  • Bolt Holes: 8
  • Outer Dia.: 2.972"
  • Inner Dia.: 0.751"
  • Thickness: 0.872"
    Helps cure:
  • Vibration
  • Leaking front pump seal
  • Leaking converter seal
  • Worn crankshaft spacer
  • Cracked crankshaft spacer
  • Cracked flywheel
  • Converter misalignment
Zip Kits

Tool Kit 37947-TL33

Zip Kits

Tool Kit 37947-TL48

Zip Kits

Tool Kit 56361-TL

Zip Kits

Tool Kit 37947-TL9

Zip Kits

Tool Kit 37947-TL11

Zip Kits

Tool Kit 37947-TL5