July 01, 2020
Always Identify These Valve Bodies BEFORE You Start a Transmission Rebuild
Andrew Jessiman
Ford 6F50 & 6F55 Identification Guide
| Figure 1 — Front View |
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| Figure 2 — Back View |
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| Figure 3 — Side View |
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BSAA5P Number is for FD6F50L, ’09-Later, 1.83 Ratio 3-5-R Clutch Regulator Valve |
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Related Units
Related Parts
Required
Recommended
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
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
Replaces 1.83 ratio OE valve with .335" dia. small spool.
-
Tooling:
- F-124740-TL21
- VB-FIX
-
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
-
Tooling:
- F-124740-TL14
- VB-FIX
-
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
-
Tooling:
- F-124740-TL12
- VB-FIX
-
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
Replaces 1.35 ratio OE valve with .390" dia. small spool.
-
Tooling:
- F-124740-TL26
- VB-FIX
-
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
-
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
-
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
-
Tooling:
- F-104740-TL12
- VB-FIX
-
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
-
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
-
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
-
Tooling:
- F-124740-TL17
- VB-FIX
-
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
-
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
-
Tooling:
- F-124740-TL24
- VB-FIX
-
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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