Driveshaft assistance needed
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Joined: Aug 2013
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From: Shelburne, NH
Driveshaft assistance needed
I am changing a 3/4 ton Eaton rear axle assembly back to the original and stock Ford 1/2 ton 9” rear axle on a 1965 F100 4WD.
by doing this, the Eaton assembly has a 38.5 inch drive shaft length (center to center of the U joints).
I need a 41.5” long drive shaft to fit the rebuilt ford axle on the 4WD truck.
I can find a 44” driveshaft from a 73-75 F100. Are these fairly standard sizes, or are there other measurements I need (such as yoke? or spline count) - to ensure it will fit?
or, what are my other options?
I appreciate the help. On a steep learning curve.
tom
by doing this, the Eaton assembly has a 38.5 inch drive shaft length (center to center of the U joints).
I need a 41.5” long drive shaft to fit the rebuilt ford axle on the 4WD truck.
I can find a 44” driveshaft from a 73-75 F100. Are these fairly standard sizes, or are there other measurements I need (such as yoke? or spline count) - to ensure it will fit?
or, what are my other options?
I appreciate the help. On a steep learning curve.
tom
Cargo Master
Joined: Jan 2016
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Yeah, if you have a 44" shaft that's good shape and already has yokes for the same size joints to mate with your differential and tranny then a shop can shorten and balance it. They can also make one up from scratch just as easy. Just verify the ujoints you need for tranny and differential...might as well avoid the conversion size joints if you can.
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Joined: Aug 2013
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From: Shelburne, NH
Yeah, if you have a 44" shaft that's good shape and already has yokes for the same size joints to mate with your differential and tranny then a shop can shorten and balance it. They can also make one up from scratch just as easy. Just verify the ujoints you need for tranny and differential...might as well avoid the conversion size joints if you can.
Cargo Master
Joined: Jan 2016
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I'd have to think a little before buying an eBay shaft without knowing the ujoint size it uses...depends on the price and if it's new. I probably wouldn't buy a used shaft. I imagine shipping on a long object might be noticeable.
Might price a brand new one made to your specs before committing to the ebay shaft.
Might price a brand new one made to your specs before committing to the ebay shaft.
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More Turbo
Joined: Aug 2013
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From: Shelburne, NH
I'd have to think a little before buying an eBay shaft without knowing the ujoint size it uses...depends on the price and if it's new. I probably wouldn't buy a used shaft. I imagine shipping on a long object might be noticeable.
Might price a brand new one made to your specs before committing to the ebay shaft.
Might price a brand new one made to your specs before committing to the ebay shaft.
Ebay one is 50.00 plus 40 for shipping. Price seems affordable, (but by the time I have one cut and welded...it may be near the cost of a new one. )
appreciate the help.
tom
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More Turbo
Joined: Aug 2013
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From: Shelburne, NH
Need a check in here:
summary before I order a drive shaft...
1. Verify yoke size. Measure current yokes being used that will mate to the differential (rear) and transmission (front) ends?
2. ensure slip yoke on replacement driveshaft is the same size as the current slip yoke. Correct?
stil on a steep learning curve...
summary before I order a drive shaft...
1. Verify yoke size. Measure current yokes being used that will mate to the differential (rear) and transmission (front) ends?
2. ensure slip yoke on replacement driveshaft is the same size as the current slip yoke. Correct?
stil on a steep learning curve...
Cargo Master
Joined: Jan 2016
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Probably more accurate to verify ujoint size (assuming you have a slip yoke for your tranny and a flange or whatever connects the driveshaft to the differential). To verify size, you'll need diameter of the ujoint cups and the width of the cups. You can google how to measure a ujoint. Then match your measurements up to the standard ujoint sizes. Guessing you have 1310 series ujoints but can't be certain until you measure. I recommend measuring because someone could have switched sizes on the truck at some point. It's nice to have tranny slip yokes and differential flanges that use the same ujoint as the driveshaft. That way you can use standard ujoints and not have to look for a "conversion" ujoint for mix/matched sizes. Also, it's nice if your entire driveshaft has all one size of ujoint.
If your current slip yoke is still good (no jiggle on the tranny output shaft and u joint cups are tight), I think you can keep using it. If the slip yoke has a deep groove from the tranny shaft seal or the u joint cups are loose enough to move with your fingers then should replace it.
Consult your driveshaft shop to verify how they want you to measure for length.
If your current slip yoke is still good (no jiggle on the tranny output shaft and u joint cups are tight), I think you can keep using it. If the slip yoke has a deep groove from the tranny shaft seal or the u joint cups are loose enough to move with your fingers then should replace it.
Consult your driveshaft shop to verify how they want you to measure for length.
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Joined: Aug 2013
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From: Shelburne, NH
Had a moment of clarity here, after thinking through some things and considering the replies to my questions. In the end today, I came to the conclusion that I was making this much more difficult than it needed to be. But, I needed to go through the process of edicting myself too. instead of trying to find a used driveshaft I Googled a couple sites, and after measuring U Joint caps, pinyon and slip yokes, I called a driveshaft company and told them I needed a 1330 Series pinyon yoke with 28 splines and 4 inch length. A 41" driveshaft measured from flat to flat of the yokes between the diff and transfer case, a slip yoke, and 1330 Series U joints.
Having a company make these and assemble into a matching drive-line assembly is easier than searching for used parts and trying to piecemeal it all together.
Thanks for the help. Now I am wiser and more 'edicted' than I was when I woke up this morning.
Tom
Having a company make these and assemble into a matching drive-line assembly is easier than searching for used parts and trying to piecemeal it all together.
Thanks for the help. Now I am wiser and more 'edicted' than I was when I woke up this morning.
Tom
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