Kirk, I'm quite sure that most dealerships will want nothing to do with internal T-Case mods when it comes warranty issues. Right now,we're still in testing on this kit, and we may see a couple of changes before this becomes a production part. We'll have our standard 1 year warranty like we do on all of our other gear reduction kits we make. Call me for more info on this kit. -Steve. 800-345-3305.