Creeg this is Marcus VXobession's husband. We own a transmission shop in Arkansas. I've built many 4l30e's. I would like to help you get to the bottom of your transmission problems. If you can give me a call at 501-860-5567. I have many questions and things for you to do so we can solve this problem. To address some of the previous posts, the range mode sensor, mode selector switch, mlp, prdl switch, neutral safety switch, ect, they are all the same thing. Different shops/people call it different names. The 4l30e has 5 solenoids. An Epc (electronic pressure control). This affects all shifts and engagement into drive and reverse. It controls line pressure. A lock up solenoid. This is for the torque converter clutch. 99 to 2000 use an on/off switch 2001 use a pwm (pulse width modulation) type. Two shift solenoids an A &B. These are on/off type. It use a combination of these to shift the transmission through the 4 gears. Last of all is a band apply solenoid (2/3). This is a pwm type. It uses this solenoid to control the forward band. It controls the band's apply when you put the transmission in drive and it controls the band release as the transmission shifts from 2nd gear to 3rd. The mode selector switch has 2 bolts holding it on, the one broke would not affect anything (needed fixed but for sure not the problem). This switch does give many problem with this transmission, but won't make it skip a gear. Also the vx transmission is different in 2001 from the other 2 years. A 99-00 will not work correctly in a 2001 and will fail. They look the same but are different. I do not like the way shops treat VX owners. They see our rides and they instantly see $. Mechanically a VX is nothing more than a trooper. Before everyone gets mad, yes its does have some special parts on it. But, the motor, transmission and transfer case are all trooper.