SOURCE: 4 wheel drive on 1999 chevy blazer
99 chev blazer should have an electric motor not a vac switch...Is your controll on the dash a switch you turn.. or on the floor you shift ??
SOURCE: 99 Silverado 4-wheel drive not engaging
It does not seem that sufficient diagnosis was done. No, you cant give a specific diagnosis like that without tearing unit down. It's likely that they told you the most common failure and left it at that. Likely there is a problem with your unit...I think this becomes more of a trust issue than a mechanical one. A second opinion from an independent reputable shop may help but either way, you need to have it fixed. In not using it much, it makes me wonder how it got worn.
good luck
SOURCE: grinding noise in the transfer case
it duse not sound good. sound like your tranfre case is on its way out.but i would have it antillies frist you may have a bad sencer
SOURCE: stuck in 4 wheel drive and wont come out.
hey there i cant tell you what you are missing but i can tell you how to disengage the front wheels . ok you have a vacum line that runs right under the battery and a line that comes up from the front diff. to the same place ( you may have to remove batt and batt tray to get full access to this) un bolt it and temporaly put batt and batt tray back in start it up and decompress this and see if it comes out .... you should here clunking noise if it goes back in ... if thats the case just pull that big vaccum line off .... to test get all four tires off the ground and have some one put it in drive but dont hit the gas it should turn on its own ...if that dont work check the cable that runs down to the differental
SOURCE: my 89 chevy s-10 pickup 4 wheel drive doesnt work.
On the 1989 s10 it has a vacuum actuator that actually locks the front differential in ,you need to check that first, those go bad real often,and without it. There's no way it will lock in the axle, the transfer case will lock in ,but the front differential uses a actuator. It 's located under the battery tray and there is a cable towards the front of the differential. Id say the actuator cable has gone out, most parts stores can get you one ,that what goes wrong with those 99% of the time and it only takes about 5 minutes to change it out. Good luck but check the vacuum line to the actuator under the battery tray.
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