Leaf spring re-arching.

oh, the hammering not only stretches the blades on the underside so they curve more up like when new, but the hammering also harden the steel so it does not sag again so easily. No heat applied.

I was told about this by my dad when I was a kid, he had been with his commercial truck to a bus company. They had their own workshop for their buses but did work on the local trucks too. There was an old guy there who took the springs apart and hammered them back to how they were new.
When I got my first Dart in 1981 and saw it was so low in the rear, I came to remember what my dad had told me about the old mechanic, and did my own research on it, and tried it. And the springs came to live again and worked very fine after.

If I can only get my hand of a piece of railroad rail for a small fee.


Bill