transmissions
Lead Driver
Joined: Aug 2002
Posts: 6,682
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From: Saskatoon SK Canada
transmissions
What transmissions will fit my '51 Ford 239 flathead. Would a later transmission fit? Were those F-8 5 speeds any good. If possible would you be able to list all the transmissions that would fit.
Thanks
Nathan
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Nathan 
Junior User
Joined: Sep 2001
Posts: 63
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From: cape may
transmissions
i believe the truck would have come with a 3 speed trans.a four speed would have been an option. i think that you can get an adapter to use some newer transmissions. try offenhouser. tim
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Lead Driver
Joined: Oct 1999
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From: Kalispell, MT
transmissions
Nathan, according to the shop manual the F8 had 2 tranny options - a regular 5 spd and a 5 spd od. 1st, 2nd and Reverse were spur gears. 3rd, 4th and 5th were helical gears.
The gear ratios only gave 2 more granny gears. Third gear ratio of 2.40:1 was similar to first gear in the F1 3 spd. So you wouldn't gain anything if you could even bolt it up. I haven't seen one, but I wonder if the tranny for the 8EQ matches the 8RT bellhousing??
I think you might do better to look for a T5 or an OD from a mid 80's pickup.
The gear ratios only gave 2 more granny gears. Third gear ratio of 2.40:1 was similar to first gear in the F1 3 spd. So you wouldn't gain anything if you could even bolt it up. I haven't seen one, but I wonder if the tranny for the 8EQ matches the 8RT bellhousing??
I think you might do better to look for a T5 or an OD from a mid 80's pickup.
Lead Driver
Joined: Aug 2002
Posts: 6,682
Likes: 12
From: Saskatoon SK Canada
transmissions
My 51 ford truck has the shifter on the floor, so I think it is a 4 spd. But it is all so a double clutch which I would like to get rid of. On the flat-o website it says the adaptor may work with later engines. Did the y-block still have the same transmission housing?
Nathan
Nathan 
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