Transmission question
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4wd Low
Joined: Sep 2021
Posts: 12
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From: Northeast Arkansas
Transmission question
Hey guys I’m new to the Ford truck scene, so I have a 1970 Highboy that I’m rebuilding for my 14 year old daughter and I have a few transmission questions. So when I bought the truck back last summer it came with, which is not the correct engine according to the VIN. It came with a 460 back behind 4-speed trans with and divorced Dana 24 transfer case which I would love to keep the transfer case. To make easier for my daughter to drive I would like to put a automatic transmission in place of the 4-speed. I have received a donor 360 stroked to a 390 with a C6 trans that came out of my father-in-law’s 76’ F-100 Ranger, so my question is, is there any way to use that combination with the divorced Dana 24 or what are my options. TIA
Cargo Master
Joined: Feb 2006
Posts: 3,012
Likes: 251
From: North Pole, Alaska
Easy since it probably came with a 360 originally. Just find the original 4wd 240/300/360 engine supports out to 1976. You can use a 2wd C-6, but the problem is that the TC shifter mounts to the tail shaft of the NP 435, so the auto would mount the same way. A 2wd C-6 doesn't have the mounting points for the shifter unless you build something for it, or find a 4wd C-6.
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4wd Low
Joined: Sep 2021
Posts: 12
Likes: 0
From: Northeast Arkansas
Easy since it probably came with a 360 originally. Just find the original 4wd 240/300/360 engine supports out to 1976. You can use a 2wd C-6, but the problem is that the TC shifter mounts to the tail shaft of the NP 435, so the auto would mount the same way. A 2wd C-6 doesn't have the mounting points for the shifter unless you build something for it, or find a 4wd C-6.
Cargo Master
Joined: Dec 2015
Posts: 2,253
Likes: 346
Besides needing engine towers for the motor mounts, you will be needing another steering column. Now, I have never done any swap like this but I also thought I have read that you have to cut the rag joint off the A/T steering column and weld a u-joint on for the 4x4 steering shaft. You will also have to do something with the clutch/brake pedal assembly. Not sure if you can just remove the clutch pedal or if you need a different assembly. You might need a little drive shaft work on the intermediate shaft but since it came out of a 4x4, it might just all bolt in. The last thing I can think of is some exhaust work. Good luck on the truck and post up some pictures of it.
Cargo Master
Joined: Feb 2006
Posts: 3,012
Likes: 251
From: North Pole, Alaska
A 2wd auto column uses a rag joint but a dent 4wd auto column does not. The F-100 C-6 can't used as it is equipped for a married NP 205 TC whereas the F-250 had divorced TC's until 1976. Actually need a dent 4wd F-250 divorced C-6 for the tail shaft TC shifter mount, or use a 2wd one and fab a shifter mount. Easiest would be to dump the Dana 24 and use a married 205 TC with the F-100 C-6.
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FTE Legend
Joined: Nov 2015
Posts: 30,940
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From: Angier, NC
I would teach her to drive the manual trans and after a year or so you can swap in the auto.
Once she knows how to drive the manual she can drive anything and show up the boys that she can drive a stick when they cant!
My dad said each one of us kids, 4 of us, had to take our driving test in a manual. Mine was a 68 Dodge van, 3 on the tree, with a stand up camper top.
Dave ----
Once she knows how to drive the manual she can drive anything and show up the boys that she can drive a stick when they cant!
My dad said each one of us kids, 4 of us, had to take our driving test in a manual. Mine was a 68 Dodge van, 3 on the tree, with a stand up camper top.
Dave ----
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Thread Starter
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4wd Low
Joined: Sep 2021
Posts: 12
Likes: 0
From: Northeast Arkansas
Besides needing engine towers for the motor mounts, you will be needing another steering column. Now, I have never done any swap like this but I also thought I have read that you have to cut the rag joint off the A/T steering column and weld a u-joint on for the 4x4 steering shaft. You will also have to do something with the clutch/brake pedal assembly. Not sure if you can just remove the clutch pedal or if you need a different assembly. You might need a little drive shaft work on the intermediate shaft but since it came out of a 4x4, it might just all bolt in. The last thing I can think of is some exhaust work. Good luck on the truck and post up some pictures of it.
Thanks for the information, I have been following your build it’s coming along nicely just wished I had the weather you have. Not here in NE Arkansas lol here are a few pictures.
Day I picked her up
Cargo Master
Joined: Dec 2015
Posts: 2,253
Likes: 346
Body looks good. Looks like maybe some floor pans and cab mounts for sure. Is the core support fixable? How involved of a rebuild are you planning? On my 72, I wasnt planning a full resto originally. Not sure how I ended up there
. And thx, its getting there slower than I figured.
. And thx, its getting there slower than I figured.
FTE Legend
Joined: Nov 2015
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From: Angier, NC
Dave ----
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4wd Low
Joined: Sep 2021
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From: Northeast Arkansas
Helper lol
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