Thread: 47-55.1 Crack in the cross member
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Old 08-15-2023, 11:07 AM   #3
dsraven
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Join Date: Nov 2010
Location: calgary alberta
Posts: 7,858
Re: Crack in the cross member

I'm with snickers on that one. smooth the weld out and weld a fish plate over the area. google what a fishplate should look like as there are many different theories on it. all the welders i have seen that fishplate a crack used a rectangle with the corners cut off and tapered and then they bolted or welded the long sides down the cut off edges but left the ends unwelded. they say it is for stress relief so the frame doesn't crack next to the fishplate. I would do both sides of the frame because if one side cracked then the other side is likely under the same type of stress so it may also need some help.
just a suggestion. it's your truck so you gotta do what you want, as long as it is safe to be on the road with everybody else's family.
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