Join Date: May 2008
Location: R10 Wisco.
StirFrey is offline
Re: four wheel drive problems
the push button 4x4 is vacuum controlled, there are several things that can go wrong, you say you can push the button and the light stays on as tho in 4wd? if this is true than it is most likely not a vacuum issue, so im going to rule out any switches on the t-case, and rule out a vacuum leak (obviously), so that leaves either a front diff internal issue or vacuum actuator issue,
to test the actuator, you can do 1 of 2 things, first option, (i prefer this one, but you will need a helper, also needs to be done on flat level surface) jack up the rear axle with a jack that has wheels, so that the rear wheels are just off the ground, dont lift it to high just in case, take the grille off the front and stick a long screw driver in the hole under neath the pass. headlight, with the vehicle running, press the 4 hi button and put the car in gear, pry against the soft side of the actuator, and have whoever is in the drivers seat give it a little gas,
if the vehicle starts creeping forward your front wheels are obviously engaged and you have just verified that your actuator is bad
Last edited by StirFrey; 05-24-2010 at 01:43 PM.