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np435 + shortbed. driveshaft?

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Old 04-17-2018, 07:52 PM
koldham
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np435 + shortbed. driveshaft?

Hello all. I just installed a NP435 in my 68. the trans i got has a fixed output yoke from a long bed. I found a chart online that shows all the driveshaft lengths and part numbers for the long beds but not on the shortbeds. If i want to keep my trans tailshaft i need an expanding drive shaft. Does this list exist for shortbeds? or is the drivehshaft im looking for just the rear section from a longbed. the truck is not in a position quite just yet to be taken off the stands and set at ride height to measure what length i need. Or is this just a case of "slip yoke tailshaft or custom driveshaft, no exceptions".
 
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Old 04-17-2018, 09:16 PM
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Originally Posted by koldham View Post
Hello all. I just installed a NP435 in my 68. the trans i got has a fixed output yoke from a long bed. I found a chart online that shows all the driveshaft lengths and part numbers for the long beds but not on the shortbeds. If i want to keep my trans tailshaft i need an expanding drive shaft. Does this list exist for shortbeds? or is the driveshaft im looking for just the rear section from a longbed. the truck is not in a position quite just yet to be taken off the stands and set at ride height to measure what length i need. Or is this just a case of "slip yoke tailshaft or custom driveshaft, no exceptions".
What size is the engine, what rear axle does it have?

Notice in the pic how FoMoCo measures driveshafts. Short bed is TYPE 4.

 
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Old 04-17-2018, 09:56 PM
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its a 360 v8, not sure what axle its got, it has a non removable diff cover and non flexomatic rear springs if that helps. ill look for a tag in the morning.
 
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Old 04-17-2018, 11:01 PM
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Originally Posted by koldham View Post
its a 360 v8, not sure what axle its got, it has a non removable diff cover and non flexomatic rear springs if that helps. ill look for a tag in the morning.
that sounds like a 9 inch
 
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Old 04-18-2018, 04:37 PM
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that chart does not show u joint to u joint measurements?
 
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Old 04-20-2018, 07:48 PM
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I don't think you're going to find any listing or chart. I don't think Ford built a two piece driveshaft for a short bed. Once the center is mounted up to the truck via a carrier bearing the driveshaft angle of the rear shaft would be too steep. I think what you'll end up doing is having a local driveshaft company custom build you a driveshaft. I would suggest starting with a 1978 and newer Bronco rear driveshaft and have that driveshaft company re-tube it longer. Bronco driveshafts were two piece with a slip yoke. But didn't use a carrier bearing.
 
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Old 04-20-2018, 08:27 PM
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No short bed of any year came w/a two piece driveshaft.

Pic: Example of a two piece driveshaft for 1965/79 F100/350 with 8' bed. Pic from 1973/79 catalog, no pic like this in 1964/72 catalog.

 
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Old 04-20-2018, 08:38 PM
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Driveshaft charts are some good reading.
 
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Old 04-20-2018, 08:54 PM
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so basically i need a slip yoke tailshaft for my trans as there is no expanding driveshaft for a shortbed?
 
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Old 04-20-2018, 09:41 PM
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Originally Posted by JEFFFAFA View Post
I don't think you're going to find any listing or chart. I don't think Ford built a two piece driveshaft for a short bed. Once the center is mounted up to the truck via a carrier bearing the driveshaft angle of the rear shaft would be too steep. I think what you'll end up doing is having a local driveshaft company custom build you a driveshaft.

I would suggest starting with a 1978 and newer Bronco rear driveshaft and have that driveshaft company re-tube it longer. Bronco driveshafts were two piece with a slip yoke. But didn't use a carrier bearing.
Dueling parts guys.

Lower pic: Where is the two piece driveshaft? No see um.

 
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Old 04-28-2018, 12:01 PM
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Originally Posted by NumberDummy View Post
Dueling parts guys.

Lower pic: Where is the two piece driveshaft? No see um.

I was referencing 4602 and 4841. But maybe instead of me calling it a 2 piece shaft I should have called it "expandable" as the OP did above.
PO, see what I mean about using a Bronco driveshaft?
 
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Old 04-28-2018, 11:06 PM
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Old 04-30-2018, 06:29 PM
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Did trucks using an NP435 ever have a slip yoke output? I recall them only having a fixed yoke.
 
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