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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

tranny swap

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Old Feb 10, 2020 | 10:00 PM
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Question tranny swap

has any one thought about swapping an eatonfuller fso 6406a or 8406a tranny instead of a zf5speed behind a 460?
 
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Old Feb 11, 2020 | 01:36 AM
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Are they big rig transmission?
Have you seen the size of them?
Who makes adaptors for them?
My guess no
Dave ----
 
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Old Feb 11, 2020 | 02:44 AM
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OK I see it's a medium to heavy medium 5 or 6 sp OD all sync trans. But at 360 lbs that is a heavy sucker!
I also see can be hard to come by back in 08 so finding one now might be even harder?
It also has a 2" input shaft so the pilot bearing has to be big could you find one to fit your motor?
Then you have a single or duel clutch disc and what to use for a pressure plate?
Good luck
Dave ----
 
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Old Feb 11, 2020 | 07:26 AM
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If you really want to do the project and have the funds then consider giving these guys a call:

https://transmissionadapters.com/pag...apter-projects
 
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Old Feb 11, 2020 | 06:34 PM
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Those big trannies won't fit under the stock floorboard. They had a special floorpan cover with a hump in it just for the zf that was stock.
 
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Old Feb 11, 2020 | 06:40 PM
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A medium duty transmission will fit, just need all the parts from a 385 series medium duty truck. The real question is why? You can't speed shift them and if you think the ZF5 is expensive to rebuild wait until you are paying Eaton prices.
 
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Old Feb 15, 2020 | 01:18 PM
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thanks for your help
 
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