No, no, no. This is repeated ad nauseum, it is totally wrong. Magnuson Moss protects you if you use non OEM parts...oil filters, air filters, oil, brakes etc. The purpose of the law is you cannot be forced to use OEM parts to keep warranty coverage, nor can you be forced to have service performed at the dealer.
The dealer and/or Ford corporate can deny warranty claims on any vehicle system affected by aftermarket modifications at their sole discretion. That’s what I said. They have to prove any failure of OEM parts was caused by the alteration. Of course the AM part would not be covered and as you suggested, Ford would likely deny the claim and put the onus on the owner to prove the alteration had not been the proximate causation.
Axle might stay the same but a lift raises the ridiculously low front bumper/valance portion of the truck, undercarriage felt, skid plates etc- There are a number of simple desert campgrounds that will cause havoc with stock mavericks but do what you need to do. I am pretty happy with the 1.5 Inch HR lift springs- Can access our back alley now without a belly rub. I do get the concern with the axles however.
Read this please. It specifically talks about the aftermarket parts aspect.
