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Message: [QUOTE="rfrostick, post: 599319, member: 9900"] i was having same issue with my truck, swap the relays, unplug bot plugs on t case motor and check for corrosion and plug them back in real good until you hear it snap into place, another thought im not sure if it affects it any but if you still have the vacuum lines hooked up check for leaks or just do what i did and unplug lines from vacuum pump and plug hole on pump and do away with auto locking hubs. you will have alot less problems by removing all vacuum still for 4wd. If im not mistaken the hubs will try and engauge several times and if they fail to engauge using vacuum then wont go into 4wd at all [/QUOTE]

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