Ok, now that I think that I finally fried my tranny, my 4wd stopped working. When I put it in either 4lo or 4hi, I dont get any vacuum up to the actuator on the axle. The front driveshaft will engage but the axle wont. I am getting vacuum to the t-case but nothing coming back out. Can anybody out there tell me what switches over the vacuum inside the unit? Pics would also be helpful. Thanks.