Tech Resources Transmission Remanufactured Valve Bodies Article Identification Guides
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September 21, 2018
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Ford 6F50 & 6F55 Identification Guide

Figure 1 — Front View
Figure 2 — Back View
Figure 3 — Side View

BSAA5P Number is for FD6F50L, ’09-Later, 1.83 Ratio 3-5-R Clutch Regulator Valve

​​​​​​​​​​​​​​BS7T4P Number is for FD6F50E, ’07–’09, 1.35 Ratio 3-5-R Clutch Regulator Valve


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Related Units

6F55 Transmission 6F50 Transmission


Related Parts

Required

Recommended

6F50, 6F55 Remanufactured Valve Body FD6F50E

6F50, 6F55
Remanufactured Valve Body FD6F50E

Fits '07–'09 units with 1.35 ratio 3-5-R. Sold without transmission control module.

Required

Recommended

6F50, 6F55 Remanufactured Valve Body FD6F50L

6F50, 6F55
Remanufactured Valve Body FD6F50L

Fits '09-later units with 1.83 ratio 3-5-R. Sold without transmission control module.

Required

Recommended

6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1) Oversized 3-5-R Clutch Regulator Valve Kit 124740-21K

6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1)

Oversized 3-5-R Clutch Regulator Valve Kit 124740-21K

Replaces 1.83 ratio OE valve with .335" dia. small spool.

    Helps cure:
  • 2-3 Flare
  • 4-5 Flare
  • Delayed Reverse
  • Reverse slip
  • 3-5-Reverse clutch burned
  • Ratio codes
  • Bind-up
  • Burnt Reverse clutch

Required

Recommended

6F50, 6F55, 6T70 (Gen. 1), 6T70 (Gen. 2), 6T75 (Gen. 1), 6T75 (Gen. 2), 6T80 (Gen. 2) Oversized TCC Control Valve Kit 124740-14K

6F50, 6F55, 6T70 (Gen. 1), 6T70 (Gen. 2), 6T75 (Gen. 1), 6T75 (Gen. 2), 6T80 (Gen. 2)

Oversized TCC Control Valve Kit 124740-14K

    Helps cure:
  • Excess TCC slip
  • Low cooler flow
  • Overheating
  • TCC apply & release concerns
  • Low converter & lube flow
  • TCC apply codes
  • TCC lining failure

Required

Recommended

6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1) Oversized Pressure Regulator Valve Kit 124740-12K

6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1)

Oversized Pressure Regulator Valve Kit 124740-12K

    Helps cure:
  • Erratic line pressure
  • Poor shift quality
  • Burnt clutches
  • Low converter & lube flow
  • Overheating
  • TCC apply & release concerns

Required

Recommended

6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1) Oversized 3-5-R Clutch Regulator Valve Kit 124740-26K

6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1)

Oversized 3-5-R Clutch Regulator Valve Kit 124740-26K

Replaces 1.35 ratio OE valve with .390" dia. small spool.

    Helps cure:
  • 2-3 Flare
  • 4-5 Flare
  • Delayed Reverse
  • Reverse slip
  • 3-5-Reverse clutch burned
  • Ratio codes
  • Bind-up

Required

Recommended

6F50, 6F55, 6T70 (Gen. 1), 6T70 (Gen. 2), 6T75 (Gen. 1), 6T75 (Gen. 2), 6T80 (Gen. 2) Isolator Valve Spring 124740-16

6F50, 6F55, 6T70 (Gen. 1), 6T70 (Gen. 2), 6T75 (Gen. 1), 6T75 (Gen. 2), 6T80 (Gen. 2)

Isolator Valve Spring 124740-16

    Helps cure:
  • No line rise
  • Line pressure instability

Required

Recommended

6F50, 6F55, 6T70 (Gen. 1), 6T70 (Gen. 2), 6T75 (Gen. 1), 6T75 (Gen. 2), 6T80 (Gen. 2) O-Ringed End Plug Kit 124740-02K

6F50, 6F55, 6T70 (Gen. 1), 6T70 (Gen. 2), 6T75 (Gen. 1), 6T75 (Gen. 2), 6T80 (Gen. 2)

O-Ringed End Plug Kit 124740-02K

    Helps cure:
  • Pressure loss
  • Shift concerns
  • Burnt clutches
  • TCC apply concerns

Required

Recommended

6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1) Oversized AFL/Solenoid Pressure Regulator Valve 124740-01

6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1)

Oversized AFL/Solenoid Pressure Regulator Valve 124740-01

    Helps cure:
  • Solenoid performance codes
  • Wrong gear starts
  • Clutch failure

Required

Recommended

6F50, 6F55, 6T70 (Gen. 1), 6T70 (Gen. 2), 6T75 (Gen. 1), 6T75 (Gen. 2), 6T80 (Gen. 2) TCC Regulator Valve Kit 124740-31K

6F50, 6F55, 6T70 (Gen. 1), 6T70 (Gen. 2), 6T75 (Gen. 1), 6T75 (Gen. 2), 6T80 (Gen. 2)

TCC Regulator Valve Kit 124740-31K

    Helps cure:
  • Code P0741, P0742
  • Harsh TCC apply
  • TCC slip
  • Loss of fuel economy
  • Low TCC apply pressure
  • Overheated fluid & TCC lining

Required

Recommended

6F50, 6F55, 6T70 (Gen. 1), 6T70 (Gen. 2), 6T75 (Gen. 1), 6T75 (Gen. 2), 6T80 (Gen. 2) Isolator Valve Kit 124740-03K

6F50, 6F55, 6T70 (Gen. 1), 6T70 (Gen. 2), 6T75 (Gen. 1), 6T75 (Gen. 2), 6T80 (Gen. 2)

Isolator Valve Kit 124740-03K

    Helps cure:
  • Low line pressure
  • Line pressure instability
  • No line rise
  • Burnt clutches
  • Harsh shifts
  • Shift concerns

Required

Recommended

6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1) Oversized 2-6 Clutch Regulator Valve Kit 124740-17K

6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1)

Oversized 2-6 Clutch Regulator Valve Kit 124740-17K

    Helps cure:
  • 1-2 Flare
  • 5-6 Flare
  • 2nd Slip
  • 6th Slip
  • No 2nd
  • No 6th
  • Ratio codes
  • 2-6 Clutch burned
  • Erratic shift timing

Required

Recommended

6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1) AFL/Solenoid Pressure Regulator Valve Kit 124740-32K

6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1)

AFL/Solenoid Pressure Regulator Valve Kit 124740-32K

    Helps cure:
  • Solenoid performance codes
  • Wrong gear starts
  • Clutch failure

Required

Recommended

6F50, 6F55, 6T70 (Gen. 1), 6T70 (Gen. 2), 6T75 (Gen. 1), 6T75 (Gen. 2), 6T80 (Gen. 2) Oversized TCC Regulator Valve Kit 124740-24K

6F50, 6F55, 6T70 (Gen. 1), 6T70 (Gen. 2), 6T75 (Gen. 1), 6T75 (Gen. 2), 6T80 (Gen. 2)

Oversized TCC Regulator Valve Kit 124740-24K

    Helps cure:
  • Code P0741, P0742
  • Harsh TCC apply
  • TCC slip
  • Loss of fuel economy
  • Low TCC apply pressure
  • Overheated fluid & TCC lining

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