YJ Frame Extension

csudman

csudman

Well-Known Member
Joined
Mar 21, 2005
Location
Statesville
I'm cutting of the front 12" or so of a yj frame to move the steering box forward and mount my shackles 4" higher than stock. The problem is, there is no such thing as I have found that is 2.5x4" tubing.

What is the best way to do this. I have a couple of options that I've read.

1. Flat plate, cut and weld. - I could do this, its just a bunch of work.

2. 2x4 tube and weld 1/4 plate to either side.

3. 3x4 tube, cut down and reweld.

Ideas?
 
csudman said:
I'm cutting of the front 12" or so of a yj frame to move the steering box forward and mount my shackles 4" higher than stock. The problem is, there is no such thing as I have found that is 2.5x4" tubing.
What is the best way to do this. I have a couple of options that I've read.
1. Flat plate, cut and weld. - I could do this, its just a bunch of work.
2. 2x4 tube and weld 1/4 plate to either side.
3. 3x4 tube, cut down and reweld.
Ideas?
Click to expand...

why not just use 2x4 tube, then use a 2.5" long sleeve at the shackle mount?
 
im also mounting the steering box back. I thing it would be easier with it being the stock size.
 
csudman said:
im also mounting the steering box back. I thing it would be easier with it being the stock size.
Click to expand...

I'm assuming the steering box is like a CJ, bolts from the bottom and one side mount the PS box bracket to the frame, then the box mounts to the bracket.
If you used 2x4 boxtube, you would only need 1/4" spacers (or a section of 1/4" plate here) on one side to mount the PS box brkt to the frame while keeping the lower bolts centered in the 2x4.
I may be way off base here, I'm just practicing my web-fab skills :lol:
 
Well, I bought some 2x4 3/16 tube this morning. I'll be adding plates to both sides then fish plating it. I guess if there is somewhere that needs to be strong, its at the steering box.
 
Yeah, I agree with option #2. Less work and probably cleaner appearance... plus its easier to add the fish plates.
 
X2 on opt.2! It cant be too thick there. It may be heavy but you could use a hole saw to make lightening holes just on the doubler plates. If you do this, EDIT; be sure to plug weld the holes, as this will further strengthen the bond between the doubler plate, & the frame extension tube.Now grind the plug welds flush so your Fitch plates will lay flat against the doublers. This will allow the Fitch plates a strong bond through the doubler, to the extension.
 
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