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Of course there is porosity on every frame made. It is acceptable if it does not exceed specs. at the time. The proper fix for excessive porosity is to grind out and reweld with MIG or SMAW.

Then you’re not looking. You can replace the front and rear third by cutting or carbon arc gouging out several welds. I know this to be true because I worked in the plant that makes the frame for twenty years. Both the front and rear of the frame were designed to be replaceable. Our rework...

The FCA Engineering standard for arc welding allows all of these conditions. With limits of course. Measurements must be made to determine accept or reject.

If anything FCA will swap out the frame. Not a terribly tough job with proper equipment. If there are just a few suspect welds FCA standard repair procedures say grind out and re-weld with a similar method that was first used.

A CWI would not be much help. To validate a weld they would need too much information that isn’t at hand. Training records, material certifications, part fit-up, and more.

The frame is built in Plymouth, Michigan by AGG( Tower Int.). Mobis turns it into a rolling chassis in Toledo.

I don’t know what the process is. I was involved in design validation testing of the JK and JL frame. FCA or Mopar should be able to help.

That is correct. The frame was designed this way I worked in the Tower Int. plant that makes it for nineteen years. Our rework people did a few over the years.

They are welded together.

That is correct. The JL frame was made by Tower International in Plymouth, Michigan. And they will bear all costs associated with the proper repair of these frames. Including twenty-five thousand or so dollars for every minute the Toledo line was shut down. For what it is worth, I am a retired...

That is one of four Steering Gear holes. Which should be mounted on the inner frame rail.

The JK/ JL frame is modular. One can replace the front, center, or rear section as needed. It was built this way on purpose.