Adding rear leaf springs
So I’ve decided that I pretty much hate the air bags that came on my rig. It’s another 2 items I have to frequently check on, I hate airing them up, and as they do lose air slowly I find it’s a pain w...
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Rear springs can't "transfer for more weight forward". Or not anything measurable, with just a few inches change in ride hight.
More steel leafs will make it stiffer. I actually like Sumo Springs. Similar concept to Timbrens, but the urethane foam has better self-damping properties than the rubber Timbren uses.The Timbrens can cause excess rebound over speed-bumps (I had aTimbrens on a work truck, and have Sumos now) while the Sumos don't really cause this.
Also Harvard is correct that raising the static rear ride height will reduce your caster. Your shop may have confused because reducing your front ride height will improve caster on radius-arm front-suspensions (or more likely, they've caster go to zero when they add front lift-kits to SuperDuty trucks). The is caused by increasing the angle between the chassis and radius arms, not by the attitude of the chassis itself.
That said.... any increase in rear spring stiffness can reduce bump steer on the Econoline, because it simply reduces roll. Roll induced bump-steer is unfortunately an inherent drawback of the Twin-I-Beam setup.
More steel leafs will make it stiffer. I actually like Sumo Springs. Similar concept to Timbrens, but the urethane foam has better self-damping properties than the rubber Timbren uses.The Timbrens can cause excess rebound over speed-bumps (I had aTimbrens on a work truck, and have Sumos now) while the Sumos don't really cause this.
Also Harvard is correct that raising the static rear ride height will reduce your caster. Your shop may have confused because reducing your front ride height will improve caster on radius-arm front-suspensions (or more likely, they've caster go to zero when they add front lift-kits to SuperDuty trucks). The is caused by increasing the angle between the chassis and radius arms, not by the attitude of the chassis itself.
That said.... any increase in rear spring stiffness can reduce bump steer on the Econoline, because it simply reduces roll. Roll induced bump-steer is unfortunately an inherent drawback of the Twin-I-Beam setup.
