Drive shaft
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Senior User
Joined: Jul 2020
Posts: 194
Likes: 9
From: Florida
Drive shaft
1964 f100 292, 3 on the tree Short Bed
Just thinking.....
Are all short beds a two piece driveshaft? If a conversion is done to an automatic with overdrive, can the new driveshaft be a 1 piece or is the span to long?
Just thinking.....
Are all short beds a two piece driveshaft? If a conversion is done to an automatic with overdrive, can the new driveshaft be a 1 piece or is the span to long?
Logistics Pro
Joined: May 2015
Posts: 4,463
Likes: 954
From: Tri Cities, TN
I always thought all the 115 inch wheelbase trucks were 1 piece driveshafts. Mine certainly were. Maybe pre 65's were different. A one piece shaft can be quite long if it is large enough diameter.
My driveshaft with a C6 is only 53 1/2 inches long center to center on the u-joints.
My driveshaft with a C6 is only 53 1/2 inches long center to center on the u-joints.
Cargo Master
Joined: Jan 2016
Posts: 2,669
Likes: 371
I only have an eight foot bed which came with a 2 piece. Adding a gear vendor overdrive unit (which required removing 18 inches of shaft) required going to a one piece per the recommendation of the driveline shop. Based on that, I'd be surprised if short beds had 2 piece shafts.
As a side note, dad had a '94 F150 and now a '95 F150...both with identical wheel base, cab configuration, engine, and tranny. One came with a 2 piece and the other with a one piece. Heck if I know why.
As a side note, dad had a '94 F150 and now a '95 F150...both with identical wheel base, cab configuration, engine, and tranny. One came with a 2 piece and the other with a one piece. Heck if I know why.
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Senior User
Joined: Jul 2020
Posts: 194
Likes: 9
From: Florida
eBay # 353360470967
This eBay seller is not that far from me and you’ll see he is selling an rebuilt AOD and adapter kit. I can get this installed but I can’t tie up a lift waiting for a drive shaft to be made & I don’t want it left outside either, so I’d bring it home and I’d figure out the shaft. I’m going through the numbers to see if it’s worth it.
This eBay seller is not that far from me and you’ll see he is selling an rebuilt AOD and adapter kit. I can get this installed but I can’t tie up a lift waiting for a drive shaft to be made & I don’t want it left outside either, so I’d bring it home and I’d figure out the shaft. I’m going through the numbers to see if it’s worth it.
Mountain Pass
Joined: Oct 2017
Posts: 191
Likes: 31
From: Seattle
Try this for a few driveline calculators, you can try out different specs; the "critical rpm" one might help answer your question...
https://spicerparts.com/calculators
https://spicerparts.com/calculators
Tuned
Joined: Aug 2017
Posts: 373
Likes: 18
From: N.W. Indiana
My truck is a long bed and originally had a two piece. I installed a CV front suspension, engine and trans. IIRC my drive shaft is 70.5 inches long. The shop who built it said with the HP the stock engine has, a 3 inch diameter and wall thickness (which I can't remember) will be fine. I have put around 1,200 miles of normal driving with a little heavy foot at times with no issues as of yet.
If you Google search you will find several post in other forums from people who state their vehicles have 70-80 inch drive shafts.
If you Google search you will find several post in other forums from people who state their vehicles have 70-80 inch drive shafts.
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Tuned
Joined: Sep 2014
Posts: 295
Likes: 25
From: Tyngsboro, MA
My 64 shortbed also 292 started life as a 3 on tree came with 1 piece driveshaft. I converted to c4 and had the original 1piece driveshaft cut down to fit.
Lead Gopher
Joined: Aug 2012
Posts: 10,021
Likes: 1,569
From: Seattle
In the case of a two piece driveshaft one of the two tubes is called the "Coupling Shaft" - the Master Parts Catalog doesn't list any "Coupling Shafts" for a short bed truck. Any chance you can post a picture of what you have so we can make sure we are all on the same page?
See A Man About A Horse
Joined: Apr 2003
Posts: 4,899
Likes: 656
From: Mariposa, Ca.
FWIW: I know you are going to modify your driveshaft when you swap transmissions, but I just changed the u-joints and driveshaft center support on my 66 lwb. The center support kit was NOS from eBay, 25.00 plus 11 bucks to ship. The three u-joints (aftermarket) were 17.99 each at my local Napa store.
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Senior User
Joined: Jul 2020
Posts: 194
Likes: 9
From: Florida
In the case of a two piece driveshaft one of the two tubes is called the "Coupling Shaft" - the Master Parts Catalog doesn't list any "Coupling Shafts" for a short bed truck. Any chance you can post a picture of what you have so we can make sure we are all on the same page?
Lead Gopher
Joined: Aug 2012
Posts: 10,021
Likes: 1,569
From: Seattle
Interesting - not sure how a person would order the correct replacements for that one, but a single piece should be fine. You can see in the list there are no coupling shafts for 114" wheelbase in 1964 or 115" in 1965/66.
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Senior User
Joined: Jul 2020
Posts: 194
Likes: 9
From: Florida
I see there is no application for a short bed. Special order? Dealer install? End or beginning of a production run/ option? Built for a Ford
employee for themselves?
Who really knows what happened the day it was built .
employee for themselves?
Who really knows what happened the day it was built .