What is auto 4wd? - Blazer Forum - Chevy Blazer Forums

General Chat Chat about all things Blazer (and related vehicles). Off-topic stuff should be in the lounge, and all mechanical problems should be posted in the proper forum.

Thread Tools Search this Thread
Old 11-25-2010, 02:17 AM
Beginning Member
Thread Starter
Join Date: Oct 2010
Location: Springfield, IL
Posts: 26
aura1 is on a distinguished road
Default What is auto 4wd?

I know the words auto 4WD should be self explanatory but for me they are not. I did try a search and found very little pertaining to what I am looking to find out.

What exactly does auto 4WD do when engaged? I noticed when I would engage 4hi I would get a clunk somewhere in the drive line signaling that the T/C was locked into 4wd. I notice that same clunk when Auto 4wd is pushed. BUT when pushing the 2hi button while the truck is in auto 4wd I don't even get a flash. Just 2wd lighting up. Same thing happend when I put it in 4hi from auto 4wd.

With winter weather quickly approaching I need to know and understand what each one does, and best driving conditions to use said 4wd's in. I don't have an owners manual or else I imagine it would explain itself.

I have noticed with the wet weather here that in 2wd I can of course spin my tires in wet conditions. In 4hi I can not, and in auto 4wd I can not. I would expect atleast some sort of slippage when in auto 4wd due to the fact that if it worked similarly to an AWD system that it would first have to notice wheel slip before engaging the other drive wheels.

The only other 4x4 I have ever noticed with such an unoticeable shift between 2wd and auto 4wd would be an 03 explorer I had for a few months.

Can anyone define what auto 4wd actually does and how it works?

I really hope this post doesn't make me seem like a complete fool.
Reply With Quote
Old 11-25-2010, 06:08 AM
glamisfanatic's Avatar
Beginning Member
Join Date: Nov 2010
Posts: 47
glamisfanatic is on a distinguished road

With Auto 4wd engaged it allows the truck to automatically engage the front wheels when it senses the rear tires slipping. Used it only once on an 01 Suburban 3/4ton we had.
Reply With Quote
Old 11-25-2010, 02:17 PM
Junior Member
Join Date: Aug 2008
Location: Kennedy NY
Posts: 481
01vortec is an unknown quantity at this point

Originally Posted by Mczuk View Post
Auto 4wd makes your blazer a subaru basically.
Hardly makes it a subaru, subaru is full-time AWD, with a bias diff.
Reply With Quote
Old 11-25-2010, 02:17 PM
Starting Member
Join Date: Jun 2009
Location: Stavanger, Norway
Posts: 161
Mczuk is on a distinguished road

Auto 4wd makes your blazer a subaru basically. We use it whenever there is a chance of icy roads (pretty much all winter here), and turn it off when the roads are bare. 4 hi is 'real' 4 wheel drive and shouldn't be used on asphalt.
I noticed that it shifts faster into and out of auto, probably because nothing mechanical is being engaged yet.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
4wd problems. Went to 4wd auto by itself. Blazeme 2nd Gen S-series (1995-2005) Tech 0 01-24-2015 07:08 PM
Auto 4wd vs standard electronic 4wd trasnfer case blazen_red_4x4 2nd Gen S-series (1995-2005) Tech 0 06-01-2014 06:43 PM
'02 auto dimming displays - auto headlights LannyL81 2nd Gen S-series (1995-2005) Tech 8 08-08-2010 02:01 PM
Auto 4wd 2000_BlzrLT General Chat 5 07-29-2007 03:15 PM
Auto Drivers side window,to auto passenger side window. possible?? hillbillyinOhio General Tech Help 9 07-12-2006 05:18 AM

1998, 2008, 2wd, 4wd, auto, blazer, chev, chevrolet, chevy, chevys, define, front, option, spin, tires

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 05:20 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.