4X4 problems

I have a 1990 s10 blazer 4.3 I just got I started to hear viberation every so often usally after a loud clunck so I replaice the right front bearing do to got worst sounds like a single engine AIRPLAIN hahaha but it still makes the noise but not in four wheel as often and sounds like the four wheel kicks in but there is no difference tracken can some one please help

When you replaced the bearing did you torque it properly? (180 ft pounds preload) Secondly, to check if you are actually in 4wd is to throw it in 4wd then drive in a tight circle in wheel lock and see if you hump the road. If you're not, your front diff isn't engaging.

not really sure about the torque and I have tried to work the four wheel on dry pavement including making a U turn there is one other thing I forgot to put the spacer ring on the shaft didn't relize it intill today and gona fix that today

If you don't torque it to 180ft punds you will end up destroying the bearings fairly quickly...

If you don't torque it to 180ft punds you will end up destroying the bearings fairly quickly...I was told as long as the cotter pin cover allows me to put it back in that would be far enough how much is true ?

could it have been that side anyways?

I was told as long as the cotter pin cover allows me to put it back in that would be far enough how much is true ?

It's not true... You can run the nut on past the cotter pin and be at less then 100 ft pounds, who ever told you that was an idiot...

that's good to know , so does that sound like the problem? or do you think it could be something else ?

You're not gonna know until that hub is properly torqued down....

not really sure about the torque and I have tried to work the four wheel on dry pavement including making a U turn there is one other thing I forgot to put the spacer ring on the shaft didn't relize it intill today and gona fix that today

Do I understand this right, did you use your truck in 4 wheel drive on dry pavement?

If you did you can really strain your trucks drive system and do a lot of damage. This might have caused some of your problems.

I only use 4x4 when I need it, and I haven't needed it yet this winter.

Do I understand this right, did you use your truck in 4 wheel drive on dry pavement?

If you did you can really strain your trucks drive system and do a lot of damage. This might have caused some of your problems.

I only use 4x4 when I need it, and I haven't needed it yet this winter.no I wanted to stop hearing that vibing noise so I had it in 4hi but when I went to park there was no showing of 4hi while making a 90degree turn now my old 87 s-10 did show it for me

no I wanted to stop hearing that vibing noise so I had it in 4hi but when I went to park there was no showing of 4hi while making a 90degree turn now my old 87 s-10 did show it for me
that didn't fix the problem except in four wheel and no power to the front end

I have a 1990 s10 blazer 4.3 I just got I started to hear viberation every so often usally after a loud clunck so I replaice the right front bearing do to got worst sounds like a single engine AIRPLAIN hahaha but it still makes the noise but not in four wheel as often and sounds like the four wheel kicks in but there is no difference tracken can some one please help

If you are hearing a noise that sounds like a single engine airplane and then a clunk, you are hearing the front differential disengaging. Check your vacuum switch on the transfer case.

If you are hearing a noise that sounds like a single engine airplane and then a clunk, you are hearing the front differential disengaging. Check your vacuum switch on the transfer case.
thanks I'll look into that on Wendsday but how do I check that ?
me Mooron

thanks I'll look into that on Wendsday but how do I check that ?
me Mooron

If you have a mechanics mirror or similar, start the vehicle and put it into 4WD. Use the mirror to look under the battery tray at the actuator. Look to see if the rubber diaphragm is pulled back. If it is, the front axle is locked, if it's not, you don't have vacuum to (probably) it. I would just swap the switch out, it is very common and not expensive, under $20. It is located on the top of the transfercase on the driver's side. It will have a connector with three vacuum hoses on it. When reinstalling, make sure you have it keyed correctly.

Unless it's the actual vaccume actuator that's torn or otherwise damaged..

< 1983 S-10 blazer 4x4 >

I read something about the box being under the battery tray so I went out side at 11:45pm to look for it... There isn't anything under the tray... I looked on the drivers side and saw a round column that had a few hoses coming out and it said Vac fluid or something like that... I relooked under the drivers side for the switch *found that* it kinda sticks out if you know what it looks like...

So should I go pick up a switch from an auto zone or something?