75" Driveshaft??
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Mountain Pass
Joined: Oct 2023
Posts: 163
Likes: 59
From: Kaslo, BC, Canada
75" Driveshaft??
As I build my 1979 F150 2wd with an 8' box and a built up 300-6 backed up by an M5OD-R2 I now discover that I need a 75" driveshaft. The truck came to me without a driveshaft and there appears to have been no provision for a two piece Driveshaft. I would like to go with a one piece shaft. On Line I can see one piece drive shafts from Ford Vans etc. as long as 80 inches.
Has anyone come across this issue and used a drive shaft from a different vehicle??. If so would you mind sharing what vehicle you found a shaft from.
Has anyone come across this issue and used a drive shaft from a different vehicle??. If so would you mind sharing what vehicle you found a shaft from.
Cross-Country
Joined: Jun 2023
Posts: 81
Likes: 46
From: Northern BC
I've had a couple longer than that made. No vibrations; there are factors besides length that go into the consideration. Like the post above this, talk to a driveshaft shop and they'll let you know if a one piece will work for your application - or not.
Regardless of length, make sure your pinion angle is set correctly. Lots of YouTubes and Google guides on how to do it. It's a lot easier than it sounds first time you try it.
Regardless of length, make sure your pinion angle is set correctly. Lots of YouTubes and Google guides on how to do it. It's a lot easier than it sounds first time you try it.
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Mountain Pass
Joined: Oct 2023
Posts: 163
Likes: 59
From: Kaslo, BC, Canada
Took your advise and sent my requirements to a local driveshaft specialist. Got a reply almost immediately base cost before adding yokes etc is $1000 Cdn. This is a non starter so I will continue the search for a non F150 drive shaft that will meet the need. I know they are out there - They live among us.
More Turbo
Joined: Oct 2006
Posts: 635
Likes: 40
Not sure if this will help but 2006 E150 van 4.6L with 4R70/75 trans uses a 4" aluminum one piece shaft that is 73" u-joint center to u-joint center, 74 1/2" end of tube, and longer counting rear axle flange and transmission input yoke.
Check Car-Part.com. I got one here locally in OKC from Riverside Salvage earlier this year for $100.
Check Car-Part.com. I got one here locally in OKC from Riverside Salvage earlier this year for $100.
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Mountain Pass
Joined: Oct 2023
Posts: 163
Likes: 59
From: Kaslo, BC, Canada
Not sure if this will help but 2006 E150 van 4.6L with 4R70/75 trans uses a 4" aluminum one piece shaft that is 73" u-joint center to u-joint center, 74 1/2" end of tube, and longer counting rear axle flange and transmission input yoke.
Check Car-Part.com. I got one here locally in OKC from Riverside Salvage earlier this year for $100.
Check Car-Part.com. I got one here locally in OKC from Riverside Salvage earlier this year for $100.
More Turbo
Joined: Oct 2006
Posts: 635
Likes: 40
If what I listed is too long, the same van with 5.4L is a couple inches shorter. Also those with E4OD/4R100 trans have a shorter driveshaft still. V10 even shorter, as does a heavier rear axle (D60 etc) has a longer snout that also "shortens" the driveshaft length.
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Cargo Master
Joined: Nov 2007
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Was that $1000 an all new driveshaft?
If you bring my local shop a used longer shaft, they'll shorten it and put all new u-joints in for a few hundred bucks.
You an always go to a pick-a-part junkyard with a tape measure and get something close that'll work. You might need conversion u-joints to make it fit, or you might need to swap yokes around.
If you bring my local shop a used longer shaft, they'll shorten it and put all new u-joints in for a few hundred bucks.
You an always go to a pick-a-part junkyard with a tape measure and get something close that'll work. You might need conversion u-joints to make it fit, or you might need to swap yokes around.
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Mountain Pass
Joined: Oct 2023
Posts: 163
Likes: 59
From: Kaslo, BC, Canada
Yes the $1000 was an all new driveshaft BEFORE they added in the yokes, U-joints and balancing. All said and done I would guess it would have ended up more like $1500 Cdn. At seeing that I am now going the used aluminum shaft route.
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