First 77 F250
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Joined: Feb 2006
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First 77 F250
This is the first truck I have ever owned and I love it. It cost 1000.00 and is all original. 129000 original miles on the 351M. Just have a couple questions. It has the 4 speed manual with the granny gear. How hard and what tranny would I need to use to put a 5 speed in it. I also want to replace the seat what years can I use that would bolt in with the least headache. I would like to use a newer bench seat with the fold down console in the middle. This website is great and havent stopped reading for about 2 days now. Thanks guys.
Posting Legend
Joined: Sep 2001
Posts: 30,255
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Hello- Welcome to FTE! Check out the list of tech forums we have on FTE. There is a wealth of information and expertise here to help you. There are a number of links in my sig below to help you also. Have fun! 
Check out the tips and tricks thread at the top of the page for seat info. The transmission is an $$$ problem.
Check out the tips and tricks thread at the top of the page for seat info. The transmission is an $$$ problem.
Posting Guru
Joined: Nov 2004
Posts: 1,628
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From: Northeast Nebraska
Im not sure about the tranny question but all seats from 1980 to 1996 (97 for F-250's) will fit in your 77. The 97's and up will fit too. Im not sure how but some guys on here have done it.
Senior User
Joined: Jun 2005
Posts: 287
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From: Utah
I have a 78, and was wondering the same thing. Here is what I found.
All the 5 speeds(OD) I could find were one piece Trans.(Bell housing attached) You would have to convert it over to a Hydralic clutch as well. First gear(granny) is almost like normal 1st gear in a car. It does not have the low reduction like the one you have now.
Other options I looked at, but did not investigate seriously were an add-on OD between the Trans and Transfer Case. A complete custom bullet proof trans with OD. Both options were out of my price range.
All the 5 speeds(OD) I could find were one piece Trans.(Bell housing attached) You would have to convert it over to a Hydralic clutch as well. First gear(granny) is almost like normal 1st gear in a car. It does not have the low reduction like the one you have now.
Other options I looked at, but did not investigate seriously were an add-on OD between the Trans and Transfer Case. A complete custom bullet proof trans with OD. Both options were out of my price range.
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