Front axle engagement fork and gear replacement kit
I'm thinking that you're getting the same thing I am, since I just got a call that my "kit" was in also. Includes the gears and a steel fork that's hell for stout, according to the guy doing the work. I wonder how many of these threads that I keep reading on engagement problems have this internal problem. Everyone seems to be hung up on servos and solenoids. If the fork isn't doing the job because it's shot, it could be easy to blame vacuum hoses and other components because they don't have the power to overcome the binding from the worn parts inside. When the mechanic manually engaged mine, he had a hell of a time getting it back out of 4x4.