will after market spring affect the warranty?

[RShatchback]

dealers will do what they can...a friend of mine had an Tiburon Auto...he lowered it with springs and later on the transmission started slipping. he followed the idea that the springs only voided the suspension warranty and brought it in for the tranny service. The dealership told him that by lowering the car the 2" or so that he did, it threw off the computer that controls the transmission which was not designed or programmed to function at that low of a height as compared to the ground. And he was not able to win the argument with them - they voided his warranty and refused to fix the transmission...He ended up trading the hyundai in for a civic.

Thats why I always keep my factory parts to reinstall if I have to bring the car to a dealership for service. Even if its engine work and I only have springs - who knows what they'll cook up...