hey guys, I have a 96 blazer 4x4 and I finally got the 4x4 to work. I replaced the vacuum lines, the actuator and the cable, and it all works. problem is, 4x4 high only engages when in neutral like 4 lo does. but i can then put it in drive and it stays engaged. It's the "shift on the fly" 4x4. Any ideas on what I'm missing?