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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
__________________
Nathan
You may have an Effie but I have a Emmie! TM
'51 Mercury M-3 Extra 5 Star Cab Dually "Faith"
5.4L, AOD, Dana 70 3.73:1, Twin-I-Beam
Built to play and work hard!
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
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.
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
You may have an Effie but I have a Emmie! TM
'51 Mercury M-3 Extra 5 Star Cab Dually "Faith"
5.4L, AOD, Dana 70 3.73:1, Twin-I-Beam
Built to play and work hard!
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Nathan 
