F250/f350 front 4 inch lift springs.

[Sparling]

is the truck jammed inside a parking garage? Thats the only way I can see the ttb arm doing damage. different valved damper, sure.

If the damper needs different valving then why don't the springs need different ppi or spring ratings? Dampers don't hold anything up. Aren't you an engineer? punch some numbers in a spring rate calculator.

Sparling - they are ****ty skyjacker springs and skyjacker only gives a **** about fit, not spring rate or ride quality

I guess. Maybe I'm crazy for thinking it wouldn't take much for thinking a spring company to have different spring rates for ttb and solid axle setups.