Transmission noise
 

So my 2000 montero sport 4wd 3 liter auto is making a strange noise between auto shifts .,Could it be solenoid chattering contacts, once in gear goes away but comes back just before changing into the next gear?What is it anyone? Any one no in Canada a cheap place to buy 4wd acuator?Right now mine is disconnected cause air nipple broke off this might be a contributing factor ,its been running like this for 6 months or more