Ok i just had the front end and rear end fluid changed a month ago and i also have both front wheel bearings chagned in the last year. But when i put my blazer in 4 wheel drive (3 button setup) it feels like the front tires are holding the rest of the car back they feel really stiff and hard to maneuver i just recently felt like this. Sometimes as well when I slow down i hear a slight grinding noise coming front the front end. I think that it is a possibility that maybe there is just bunch of snow and ice underneath affecting it or something Any ideas??

 

Your problem is likely a sticking actuator cable, leaking actuator, or a vacuum leak between the engine (vacuum source) and the vacuum actuator (under the battery).

You could have transmission fluid in the vac system which would cause it to be sluggish as well. This is caused by an over full condition in the transfer case from a bad front case seal. If you pull the upper plug on the back of the transfer case and fluid pours out, your next task will be dropping the transfer case. While you have it out, replace the vacuum switch and flush out the vacuum lines.

 

How do i flush out the vacuum lines? and do i have to replace the transfer case or just drop it out empty it and put in the correct fluid in it. Could this have been caused by when i took it to Valvoline and had them change the fluid could they have put to much back in it. Also how quick should i do all this because i do not have time to do all of it right now so how long could i wait to do it and if i wait to long what will happen

 

First you have to determine if that is actually the cause. Once you have verified that you have an over full condition, you must remove the transfer case to replace the input seal on the front of the transfer case.

As far as flushing vacuum lines, I would use something like simple green or other suitable degreaser that won't harm the vacuum lines.

 

Do your tires have the same tread depth front and rear. My front tires are worn more than the back and it acts kinda like what you are describing.

 

Well they are they same kind of tires but i did put the ones on the back around 6 months after i put the ones on the front. They do look a little more wore then the rear tires. Is this a problem or do i just have to wait for the rear tires to catch up or should i rotate the tires.

 

with 4x4s you want to make sure the tires have the same amount of wear. You never want to buy just two tires always four. You can ruin you transfer case.

 

good to know i would have got 4 but i did not have the money to get all 4 at the same time. What should i do now put the ones on the back on the front our... any ideas also if it stays in 2wd most of the time is that big of a deal or does it affect it all the time

 

it will be fine in 2wd. I would try not to use 4wd as much as possible until the tires are more even. Put the ones with more tread in the back

 

That is how i have it now i kind of figured that would be better i more or less just use the 4 wd to get up my driveway and sometimes when the roads get a little slick but more or less the 4wd button stays un-pushed this summer the back tires should even up with the fronts when i do not have to use the 4 wd at all