I have a 93 Jeep Wrangler with a 4.0 HO straight 6 5 speed 4x4 I'm needing to know the proper name for the vacuum sensor or solenoid on the firewall side of the intake behind the throttle body that is a main vacuum that controls the front axle I can't find one at any parts house no one knows what it's called online says climate control,cruise control, or 4x4 axle when equipped I can't find it I don't know if it's due to unproper name or what looking for help thanks an thanks fur the add to the page