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1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

Transmission question

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Old Jan 23, 2022 | 10:28 AM
  #1  
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Lokiman
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Transmission question

I have a line on an engine/trans combination for my 48 F1. It is a 4.6 DOHC -2003. The question is the transmission. It appears to be a 5R55s. I would need an aftermarket controller for it. I can't seem to find one. I will be running a Sullivan intake and MSD controller for the ignition. Should I just try and find a 4R75? I see seveal companies that have controllers for the other transmissions. I just don't see one for the 5R55. What am i missing. This will not be a high HP engine. Around 300 hp.
 
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Old Jan 23, 2022 | 03:31 PM
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The 5R55S is a far more complicated transmission to shift than the 4R70. It has very limited use in the hot rod world, so I doubt that you'll find a controller that is capable of running that transmission.
 
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Old Jan 23, 2022 | 09:05 PM
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So I think a 4R70W or 75W will just bott up. Is that rightr?
 
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Old Jan 23, 2022 | 09:17 PM
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There were millions of 4.6L/4R70/75W drivetrains built.
 
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