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New member here, but I have been trying to read as much as I can before I asked for help. I have a 1989 F150 4wd with a 351 that I bought about two years ago. It has around 138,000 miles on it. I was considering leveling the front end, and I noticed that the rear is about 3.5' higher than the front. I would like some help understanding why my leaf springs look like they do. They appear to have a regular stack of springs and then a spacer on top of that pack then another spring stacked on top of that. I am attaching a couple of pics. I am just curious as to why it is like this. Is this a factory design, or something that was done afterwards? I appreciate any help in answering this. Thanks,
An overload spring like that, helps carry the load only when you have enough weight on the truck. Had you backed up and taken the photo from further away, you would see where the ends of the spring come in contact, when loaded and start taking some of the load.
Overloads or auxiliary springs are added, rather than adding another main leaf, because the more main leafs you have, the stiffer the ride will be all the time and the higher the truck will set.
Overloads can also be stacked, like I did to my dually;
You'll see they're factory stacked on larger trucks, like my F450;
Be glad you have those factory overload springs
They were like a 600 dollar option IIRR
They have no effect until you load the bed
if you fill the bed with railroad ties or dirt, they will contact and make some noise. Be happy about that
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