Tcat55371 Posted May 13, 2005 Share Posted May 13, 2005 86 XT 5speed - 4wheel drive is hit and miss. I have power at the switch depending on where the switch is sitting. Hoses are hooked up to the vac switches and down to the trans. Is there a way to test the vac switches. I see the barrel covers and am guess I could put a gauge on each one. Is this correct? New question would be is that big vacuum canistel repairable or still ava. ? Link to comment Share on other sites More sharing options...
Turbone Posted May 13, 2005 Share Posted May 13, 2005 I think its electrical. I assume its a pushbutton 4wd and if so, theres a servo that pushes a pin into the transfer case engaging 4wd. Check to see if the plugs are tight first, if so you may need to replace it. I have seen one that didnt work at all because the pin was sheared in half. Link to comment Share on other sites More sharing options...
diluded000 Posted May 14, 2005 Share Posted May 14, 2005 I had a similar problem with my 85 DL, and wound up pulling the whole vacuum actuator out, and plugging the hoses. You can trace the hoses from the actuator up to the solenoids that are up-top on the drivers side, a little ways from the firewall. Mine was actuating just fine, it was just the transmission was somewhat binding up and wouldn't go in and out of 4WD. I could get up under there with a screwdriver and force it to engage, but then the snow would melt and I could barely back out of a parking space for the binding. I finally fabricated a linkage that goes through the transmission hump, and has a shifter arm in the passenger compartment. I can really feel it bind up and not want to engage sometimes. I found the best time to engage/disengage is to gas it a little, let off the gas (still in gear), and pull it in and out of 4WD. - James B Link to comment Share on other sites More sharing options...
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