I've had a burnt solenoid for a while, the brown one (2wd I believe). In the past, I have been able to get it into 4wd with the old hose swap technique. The last time I used that method was a few months back during a snow storm and it took forever (about 5 miles of driving) to engage. I figured that it was because it was frigid. Today, put a new brown solenoid in and have confirmed that it is working. Button out, I get suction from the Brown. Button in, I get suction from the blue. However, no 4wd. Am I dealing with a vacuum leak somewhere between the solenoids and the T-case? What else could be wrong?