4 wheel drive noise problem - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



Welcome Enthusiast! If you already own a Chevy TrailBlazer or GMC Envoy or perhaps thinking of purchasing such a vehicle, then you have come to the best TrailBlazer and Envoy site on the net! Rainier, Bravada, Ascender, and 9-7x owners welcome too!

You are currently viewing our site as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to search and post topics, communicate privately with other members, respond to polls, upload content, and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.
Join Today!
Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 5.3L V8 Engine and Drivetrain > 4x4 Drivetrain

4x4 Drivetrain 4x4 Repairs & Problems

TrailVoy.com is the premier GMC Envoy Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools
  #1  
Old 12-30-2009, 08:54 PM
Dr_Acula Dr_Acula is offline
Junior Member
 
2003 Chevy TrailBlazer LT
Black 4.2L I6 4X4
Join Date: Dec 2009
Location: Minnesota
Posts: 3
4 wheel drive noise problem

Hello all,

I have an 03 trailblazer, 100,000 miles. When putting it into 4hi you get a whining noise, this noise is much louder in 4 lo (The best way i can describe this noise is if you take an rc car or something driven by an electric motor and push it along manually,). It doesnt really sound like a bearing or anything like that, also you dont feel anything. After checking fluid levels and such, and the problem not changing, I did some more listening and it seems the noise is coming from the transfer case motor. When the switch is flipped to a 4x4 mode, you can hear the axle motor go into place smoothly, but the differential motor struggles, makes a louder noise than the axle motor and seems to try twice and then it either over rides itself or engage as far as it can i cant really tell although it does go into 4 wheel drive.

Does anyone know how their transfer case motor sounds when it goes in and out of 4 wheel because this sound like its working to hard and binding up a bit.

All the lights on the 4x4 switch work normally, and the service 4x4 light has never been on, also the noise goes away completely in 2wd. I am thinking i will change the transfer case motor just wanted some opinions. Any help appreciated. thank you.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 12-30-2009, 09:33 PM
the roadie's Avatar
the roadie the roadie is offline
No longer with us
 
2004 GMC Envoy SLT "Roadiemobile"
Extreme Offroad Pewter 4.2L I6 4X4
Join Date: Apr 2005
Posts: 26,181
If your fluid level is OK, then you've got it narrowed down correctly. It may still be binding inside the transfer case, though. But swapping that is more work and expense, unless you get a cheap one at a junkyard that includes the encoder motor.

Lots of them on Ebay last I looked. Make sure you get the 7-pin, not the 5-pin.

Reply With Quote Quick reply to this message
  #3  
Old 12-30-2009, 09:58 PM
Dr_Acula Dr_Acula is offline
Junior Member
 
2003 Chevy TrailBlazer LT
Black 4.2L I6 4X4
Join Date: Dec 2009
Location: Minnesota
Posts: 3
thanks for the reply, yeah i can get a rebuilt for 130 after all is said and done, that seems to be well worth it rather than taking on the transfer case. Fluid levels were good i changed the front diff fluid as it was a little low and didnt know when it was changed last. From your experience does the transfer case motor operation sound similar to the front axle motor engaging, I realise it would be louder but it also sounds more labored and like it tries twice. Thanks again
Reply With Quote Quick reply to this message
  #4  
Old 01-24-2014, 09:25 PM
autocad autocad is offline
Junior Member
 
2003 Chevy TrailBlazer LT
Graphite Metallic 4.2L I6 AWD
Join Date: Jan 2014
Location: Shreve, OH
Posts: 1
Quote:
Originally Posted by Dr_Acula View Post
Hello all,

I have an 03 trailblazer, 100,000 miles. When putting it into 4hi you get a whining noise, this noise is much louder in 4 lo (The best way i can describe this noise is if you take an rc car or something driven by an electric motor and push it along manually,). It doesnt really sound like a bearing or anything like that, also you dont feel anything. After checking fluid levels and such, and the problem not changing, I did some more listening and it seems the noise is coming from the transfer case motor. When the switch is flipped to a 4x4 mode, you can hear the axle motor go into place smoothly, but the differential motor struggles, makes a louder noise than the axle motor and seems to try twice and then it either over rides itself or engage as far as it can i cant really tell although it does go into 4 wheel drive.

Does anyone know how their transfer case motor sounds when it goes in and out of 4 wheel because this sound like its working to hard and binding up a bit.

All the lights on the 4x4 switch work normally, and the service 4x4 light has never been on, also the noise goes away completely in 2wd. I am thinking i will change the transfer case motor just wanted some opinions. Any help appreciated. thank you.
Doctor - This issue seems identical to mine. Same vehicle. I know it's been a few years, but could you please let me know if/how this issue was resolved for you??
I thank you Good Sir.
Reply With Quote Quick reply to this message
  #5  
Old 01-25-2014, 11:46 AM
Dr_Acula Dr_Acula is offline
Junior Member
 
2003 Chevy TrailBlazer LT
Black 4.2L I6 4X4
Join Date: Dec 2009
Location: Minnesota
Posts: 3
My problem was the transfer case, after not feeling confident in my diagnosis, I brought into a local private shop. He said it was deifinately the transfer case and gave me the options for replacement. New, refurb and junkyard special. I decided to go with the junkyard, found one with 60,000ish miles and had It installed for around 550$ I think. Havent had any problems with that part since and wife heavily used 4 wheel drive in winter. Hope this helps.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum forums, you must first register.

Please enter your desired user name, your email address and other required details in the form below.
(Only letters, numbers, dashes and underscores are permitted for user names)
The user name that you choose is permanent and can never be changed.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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

Forum Jump


» Sponsors

Advertising Info

All times are GMT -4. The time now is 06:17 PM.


Chevy TrailBlazer and GMC Envoy Enthusiasts - Copyright 2004 - 2009 All Rights Reserved.
All trademarks referenced herein are property of their respective owners.
RSS Feed