Having problems engaging 4wd - Off-Road Forums & Discussion Groups
GM Standard IFS Trucks & SUV's All discussion of full sized IFS Trucks, SUV's to include Suburban

LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 03-20-2004, 08:52 AM
Posts: n/a
Having problems engaging 4wd

A few months back, a small needle bearing in the front diff decided to give up on me, allowing the axle to compress the small circlip holding the axle into the housing, and it slid out and destroyed my passenger side CV shaft.

I fixed that all up, and just recently have had problems engaging 4wd.

When I shift to 4x4, it sounds like the front diff is having a hard time engaging. Almost like the slip collar in the front end isn't sliding overtop of everything properly. You can hear a horrid grinding noise.

I replaced the actuator with a known good one with the same results.

Does anyone have any suggestions as to what this could be? I'm thinking a stripped out slip collar, or bent actuator fork.

Any help would be appreciated. The truck is a 90 GMC K1500.
Sponsored Links
post #2 of (permalink) Old 03-20-2004, 10:48 AM
Carpal \'Tunnel
wrath's Avatar
Join Date: Nov 2001
Location: Waukesha, WI
Posts: 3,323
Thanks: 0
Thanked 1 Time in 1 Post
Re: Having problems engaging 4wd

Try running power directly to the actuator. It might be the switch in the transfer case that is bad causing the actuator to go on the fritz.
wrath is offline  
post #3 of (permalink) Old 03-20-2004, 02:17 PM
Posts: n/a
More info...

I forgot to add that if I'm in 4x4 and stop quickly, 4x4 disengages and then grinds/pops when I go to accelerate.

What exactly happens in the transfer case when I shift to 4x4, and how do I run power to the actuator?
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome