Tremor front spring options

[Rob89]

From what I’ve researched, Ford makes a 5200 pound LAT spring, which I think is the most common tremor spring. I also see a 5600 pound LAS spring. This would be the tremor equivalent to the heavy service 1 up non tremor spring.
Is this correct or am I off on left field?

 

[longbed94]

From what I’ve researched, Ford makes a 5200 pound LAT spring, which I think is the most common tremor spring. I also see a 5600 pound LAS spring. This would be the tremor equivalent to the heavy service 1 up non tremor spring.
Is this correct or am I off on left field?

Yeah I am stumped on this as well !

 

[RedZilla]

From what I’ve researched, Ford makes a 5200 pound LAT spring, which I think is the most common tremor spring. I also see a 5600 pound LAS spring. This would be the tremor equivalent to the heavy service 1 up non tremor spring.
Is this correct or am I off on left field?

As I understand it the diesel has a heavier front spring than the 7.3 version. This would account for two different coil springs for the Tremor package.