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1951 Ford f4 Transmission
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1951f4
New User
| Posts: 1
| Joined: 07/08
Posted: 07/10/08
12:11 AM
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I have the flathead 239 with a four speed, and I would love to take it on the interstate....... but it tops out at 52 mph..... is there an "easy" solution to this? can i put a five speed in it? is there a later model transmission that just bolts on?
thanks,
Rob
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Shumaker
New User
| Posts: 3
| Joined: 05/09
Posted: 05/30/09
12:09 PM
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Understand that the primary issue is with your rear end gears and not necessarily the transmission. I am getting to this part with my driveline as we speak, keep checking the replies you get as will I. Thanks for asking this question!
Mike
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Posted: 06/20/09
08:24 PM
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The F-4 has the duel rear ?? Find a newer rear that has the tallest gear ratio that you can find . I used to run a 6 cylinder with a 55 ford milk truck trans and used a 63 f-100 rear with 3.77 gear and then changed to a 3.00 rear from a 63 Galaxie. I did not shift to fourth gear until 65 mph. Dude 
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