If u blow a shock and ur not on the stock setting than they can def void the warranty on it. They'll just say that because you increased the compression on the spring it caused the shock to fail because that's not how U got the truck from them it wasn't meant to be like that blah blah blah. Some dealerships are cool and won't care and if need be will just put it back to stock so that they can do the warranty work( assuming they adjusted it in the first place). They get paid a time and a half for every hour of warranty work so the dealerships love it. But before any warranty work can be done ford has to give the green light and sometimes they will send someone to inspect the truck themselves to make the decision on whether or not they would fix it under warranty. I had a set of stock cats clog up and fail on me. My buddy said warranty would cover it but someone from ford came by for some warranty audit shit and he said because I had cut the cats out and put them back on ford would not cover it. (I ran no cats for a few months). So if u adjusted the perch and something messed up I don't see how the same ideology wouldn't apply in terms of voiding warranty. Heck I've been through 3 leaf springs all covered under warranty because of a really bad squeaking issue and the fact that they're junk in the first place. I'm having the same problem and when I told my buddy about it he told me that ford told his dealership specifically that the infamous "squeaky lead spring" issue would no longer be covered under warranty. The noise has been deemed "acceptable and still functional". They recommend you pay them to lube it up now lol. No more new inserts or springs for me I guess....
Do what you want but I've played the warranty game with plenty of dealerships and I'd rather avoid the issue in entirety than even begin to go down that shit show of a road. I keep all my stock stuff and throw it back on if need be. Plausible deniability...that's my plan.
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