no. it does not void your warranty due to the Magnusson Moss warranty act. The Magnusson Moss warranty act states that in order for a dealer to blame some sort of mechanical failure on a particular aftermarket part, they have to be able to prove a connection.
so, if your spacer somehow caused your transmission to explode, the dealership would have to be able to prove the spacer was the cause in order to not replace your transmission, which would be difficult for them to do.
