4x4 not working

This bothers me ; "I will say I can definitely hear a noise at the front tire area when it is in 4hi, and the back tires are spinning but the fronts are not... "

Just a long distance guess --- front axle lock mechanism isn't quite making into "LOCK" condition --- all the time.

Sooo. The front axle disconnect is probably bad/ worn out?

Is there any way to diag this. No lights or codes are present after scanning with bluedriver.

I can probably pick up a used disconnect and motor assembly from the junkyard for pretty cheap.

All this jazz happens on the passenger side only right?

I probably won't work on this until it's nice outside. But I want to know as much as possible before I tackle it.

During winter (read: ice/snow/salt/gravel) on the roads and questionable gaskets on the servo motor that drives the fork to move the slider that puts you in and out of locked front axle --- I say you might start there and take the motor out and see if it's stuck ... or full of rust/corruption and won't move at all ... or the fork is busted or lost the pads or --- or --- just go take a physical inspection of it as it's a very likely suspect because of the noise you say it has.

I'm also not too sure that there's any codes to pop for this failure - after all, the command goes out and I'm not too sure there's a parity test for it being accomplished.

The front axle disconnect isn't a very robust piece of kit (as our British brethren like to say). The needle bearings on mine literally fell apart and out when I was replacing the front axle, which necessitated the replacement of the axle disconnect (yes, I know, fancy words...). I wouldn't bother with a junkyard unit since new units aren't that expensive. The only caveat (ooh, another fancy word) is that if you do get a new disconnect take it apart and grease everything well, mine came with very little grease inside.

Ock said:

Sooo. The front axle disconnect is probably bad/ worn out?

Is there any way to diag this. No lights or codes are present after scanning with bluedriver.

I can probably pick up a used disconnect and motor assembly from the junkyard for pretty cheap.

All this jazz happens on the passenger side only right?

I probably won't work on this until it's nice outside. But I want to know as much as possible before I tackle it.

Click to expand...

I'm having this exact same issue rn. I believe my disconnect **** out on me too. I haven't gotten around to fixing it yet but I do believe that is the problem.

It's about $100 for a new part. Or if you want to replace just the fork (most likely what went bad) it's about $60. I recommend getting a new one because a used one will just be worn and may only work for a short while.

It's connected to the passenger side of the oil pan, you have to disconnect all the moving and suspension parts along with the wheel on the passenger side to slide your CV axle out and get the part off.

Ashton said:

I'm having this exact same issue rn. I believe my disconnect **** out on me too. I haven't gotten around to fixing it yet but I do believe that is the problem.

It's about $100 for a new part. Or if you want to replace just the fork (most likely what went bad) it's about $60. I recommend getting a new one because a used one will just be worn and may only work for a short while.

It's connected to the passenger side of the oil pan, you have to disconnect all the moving and suspension parts along with the wheel on the passenger side to slide your CV axle out and get the part off.

Click to expand...

Lift kit made 4x4 stop

This was my discussion I had and a lot of good information in here if you scroll pass the BS

Ashton said:

Lift kit made 4x4 stop

This was my discussion I had and a lot of good information in here if you scroll pass the BS

Click to expand...

Cripes!

Don't tell him that --- BS is the catsup on your fries ... the Super-Size of your Dr. Pepper, neat ... and always has at least a modicum of information to add to the convo.

.... and .... besides .... every post needs a whipping boy ... a colorful idiot with counterintuitive factoids ... a town clown (I HATE clowns) ---- to blame when things go wrong after this (very) expensive (free) advice proffered by a bunch of hung-over addicts (semi-pro alcohlics) from the night/day/week/lifetime before.


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Thanks for the advice guys. I'll make a note in my calendar to reply to this thread with results when I tackle this in a few months.

2hi is back to operating as normal so I should be fine as long as it doesn't snow 10 inches again.

Any chance you heard any noises before the 4wheel seized? Maybe howling/grinding from the front end could indicate differential issues. Just a long time owner… NOT a certified Chevy tech.