So when my truck had 4000 miles on it the arm of the transfer case broke, which caused the transfer case to drop a couple inches which bent the driveshaft, busted one CV axle and tweaked the other one. Total cost for all those parts replaced by the dealer was $4500. I went back and forth with multiple dealerships and Ram Corporate for a full month and without “proving” anything they refused to warranty any of it because the truck had a BDS lift put on it 2000 miles prior. Even though nothing on the lift broke, it was the factory transfer case ram that broke and caused all the damage. I escalated the situation as high up as I could get it, and at the end of it they basically said “F off, we’re 100% not warrantying this because it was lifted and when I said I would get an attorney they basically laughed and said something along the lines of “go ahead, we have deeper pockets and better lawyers than you.”
So I laugh when I hear people quote the Magnuson Moss Act because yeah in a perfect world they have to “prove” it caused the damage, but in the real world they have good lawyers and they will find a way to get out of it. Ram service is absolutely a joke, and if you want your truck’s suspension (and probably powertrain) under warranty I would have the lift kit installed by the dealership with written acknowledgement that they will still honor the warranty. When I was going through all the claims with Ram Corporate and everything they never once asked what kind of lift it was, they were ONLY concerned about if the dealership did the install. And as soon as they learned another professional shop did it and not the dealership they told me to kick rocks.