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1961 - 1966 F-100 & Larger F-Series Trucks Discuss the Slick Sixties Ford Truck

fixing cracked frame?

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Old Jan 7, 2013 | 02:48 PM
  #1  
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fixing cracked frame?

so...now that the bed is off, i can finally get a good look at it...
ouch.



a couple of questions:
is that big hole supposed to be there?
and the big question...how would you go about fixing/patching/strengthening this?
 
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Old Jan 7, 2013 | 03:12 PM
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wow that frame is beat! anythings fixable tho.
 
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Old Jan 7, 2013 | 04:17 PM
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I would only trust that repair to a repair shop that knows how to do full frame vehicles. My personal opinion would be to just find another frame. I had to do it on my first slick.
 
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Old Jan 7, 2013 | 04:19 PM
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I think the hole is supposed to be there.

I would sandblast to start with. Then bevel the crack as much as possible. At that point actually straighten the frame. Id cut a pattern off the good side to see how much you need to move it. Once you have the frame where it needs to be, weld it solid from both sides. I would then clean up the outside to make it look decent, and clean up the inside. I would plate the inside area with another piece of steel, probably 3/16" thick, about a foot long, that fits the rail tight, top to bottom.
 
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Old Jan 7, 2013 | 05:13 PM
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my 1966 shortbed does not have the large hole, only the 2 small ones.
 

Last edited by carras; Jan 7, 2013 at 05:28 PM. Reason: using a better pic
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Old Jan 7, 2013 | 06:02 PM
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What are the things welded to the top of the axle housing for? Was that a coil spring?
 
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Old Jan 7, 2013 | 06:08 PM
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Originally Posted by hiball3985
What are the things welded to the top of the axle housing for? Was that a coil spring?
yep...

now that we've got Carras' photo for comparison- here's what i *think* the crazy PO may have done...

i think he may have drilled the hole in the frame and used it as a retainer for the top end of the coil spring.
 
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Old Jan 7, 2013 | 06:11 PM
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Originally Posted by carras
my 1966 shortbed does not have the large hole, only the 2 small ones.
thanks for that-
question: if you look back at my pic- notice how the bottom of the frame (to the left of the crack) has a lip that is sort of bent downward?

is yours like that, or perfectly straight c-channel? i don't have anything to compare it to.
 
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Old Jan 7, 2013 | 06:12 PM
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Originally Posted by C G B
I think the hole is supposed to be there.

I would sandblast to start with. Then bevel the crack as much as possible. At that point actually straighten the frame. Id cut a pattern off the good side to see how much you need to move it. Once you have the frame where it needs to be, weld it solid from both sides. I would then clean up the outside to make it look decent, and clean up the inside. I would plate the inside area with another piece of steel, probably 3/16" thick, about a foot long, that fits the rail tight, top to bottom.
This.

Weld it up...if you can't weld it, take it to someone who can.
 
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Old Jan 7, 2013 | 06:22 PM
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Originally Posted by rustywheel68
yep...

now that we've got Carras' photo for comparison- here's what i *think* the crazy PO may have done...

i think he may have drilled the hole in the frame and used it as a retainer for the top end of the coil spring.
Good old Hillbilly overloads . They may have added the hole to keep the crack from spreading to the main section. I wouldn't weld the crack, I would put in a plate.
 
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Old Jan 7, 2013 | 08:21 PM
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Originally Posted by rustywheel68
thanks for that-
question: if you look back at my pic- notice how the bottom of the frame (to the left of the crack) has a lip that is sort of bent downward?

is yours like that, or perfectly straight c-channel? i don't have anything to compare it to.
Mine has the bend that you mention

Here's a closer look. The bend makes room for the rear shock (not shown)

 
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Old Jan 7, 2013 | 08:32 PM
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Originally Posted by C G B
I think the hole is supposed to be there.

I would sandblast to start with. Then bevel the crack as much as possible. At that point actually straighten the frame. Id cut a pattern off the good side to see how much you need to move it. Once you have the frame where it needs to be, weld it solid from both sides. I would then clean up the outside to make it look decent, and clean up the inside. I would plate the inside area with another piece of steel, probably 3/16" thick, about a foot long, that fits the rail tight, top to bottom.
Yep. I'm a welder and this pretty much nails it. I've used this method on anywhere from log and dump trucks to light pickups and trailers and it has never let me down.
 
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Old Jan 8, 2013 | 04:41 AM
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Originally Posted by rustywheel68
yep...

now that we've got Carras' photo for comparison- here's what i *think* the crazy PO may have done...

i think he may have drilled the hole in the frame and used it as a retainer for the top end of the coil spring.
1965/78 LTD's have coil spring rear suspension w/a track bar. It's possible PO got a 9" from one, then tried to install the 9 and the coil spring suspension.
 
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Old Jan 8, 2013 | 02:27 PM
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Where do you live? I am buying a donor truck and will not be using the frame..you are welcome to it when i get the truck.

Vince
 
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Old Jan 8, 2013 | 02:36 PM
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Originally Posted by NumberDummy
1965/78 LTD's have coil spring rear suspension w/a track bar. It's possible PO got a 9" from one, then tried to install the 9 and the coil spring suspension.
No, the pic shows the remains of a coil spring welded directly to the housing. OEM had a "cup" if you will to hold the spring.
 
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