My truck shifts like a sports car!!!!!!!!! I bypassed that VRV valve and connected hose from vacum pump directily to tube that goes to modulator and whala!!! my truck shifts SOOOO freaking smooth I cant even tell when it shifts!!!! i shyt you not. It may shift a little early, but that could be cuz i need to re-adjust my modulator now. I have never been so happy to want to drive a truck till now!!!