Bought a Sonnax 545RFE Line Booster and shipping was $27 for ground in the US. Ready to plug it in and see what its all about. I have herd good things about this product.
As far as warranty it shouldnt void it but i would talk to your dealer and get that in writing as a guy on another forum i am a member of suggested and did. He said It shouldn't void anything because it actually helps the life of the transmission and they shouldn't be able to use that against you unless they can pin point the malfunction to the pressure booster itself. I bought my truck used so i don't get that lifetime warranty sadly. I PMed you the other info.Just curious where did you order it from and what the cost was. Also will it in any way void warranty for the trans.