Engine & Transmission Post your Engine and Transmission related problems here.

4x4 problem actuator always has vacuum on it even in 2hi

Thread Tools
 
Search this Thread
 
  #1  
Old 04-14-2021, 06:48 PM
Cchey91's Avatar
New Member
Thread Starter
Join Date: Mar 2021
Posts: 7
Cchey91 is on a distinguished road
Default 4x4 problem actuator always has vacuum on it even in 2hi

My 95 blazers front axel vacuum accuator has vacuum on it even when its not in 4hi on the 3 button switch is that normal im afraid that my front axel is engaged even in 2hi
 
  #2  
Old 04-14-2021, 07:52 PM
DonL's Avatar
BF Veteran
Join Date: Nov 2016
Location: Ontario canada
Posts: 3,989
DonL is on a distinguished road
Default

This one sentence, doesn't really make sense. Can you elaborate a little more please?
 
  #3  
Old 04-14-2021, 08:08 PM
Cchey91's Avatar
New Member
Thread Starter
Join Date: Mar 2021
Posts: 7
Cchey91 is on a distinguished road
Default

Ok i start my blazer and its in 2hi right according to the 3 button switch. Now while started i remove the battery and tray to see the actuator for front axle. The actuator is pulled in (engaged) all while still in 2hi. The vacuum never goes away on the actuator no matter what button i push on the 3 button switch
 
  #4  
Old 04-14-2021, 08:23 PM
DonL's Avatar
BF Veteran
Join Date: Nov 2016
Location: Ontario canada
Posts: 3,989
DonL is on a distinguished road
Default

Did you have the vehicle off the ground to see if the wheels are actually engaged? Or just by the actuator? These tend to go faulty, and a lot of people go with a bravada swap or make it a manual shift setup.
 
  #5  
Old 04-14-2021, 08:33 PM
Cchey91's Avatar
New Member
Thread Starter
Join Date: Mar 2021
Posts: 7
Cchey91 is on a distinguished road
Default

No i did not have it jacked up but ill try that tomorrow and see if they are locked in or not i was just curious to if the Tc vacuum switch could be stuck open and allowing the engines vacuum to stay on the actuator instead of having it vent
 
  #6  
Old 04-15-2021, 06:54 AM
DonL's Avatar
BF Veteran
Join Date: Nov 2016
Location: Ontario canada
Posts: 3,989
DonL is on a distinguished road
Default

I'm not sure myself, just trying to get more info for other who know more.

Wonder if your actuator is stuck and not the vacuum.
 
  #7  
Old 04-15-2021, 09:26 AM
Cchey91's Avatar
New Member
Thread Starter
Join Date: Mar 2021
Posts: 7
Cchey91 is on a distinguished road
Default

No the actuator releases when i turn off the engine
 
  #8  
Old 04-15-2021, 11:56 AM
Tom A's Avatar
BF Veteran
Join Date: Jul 2013
Location: Northeastern Nevada, USA
Posts: 2,417
Tom A will become famous soon enough
Default

Sounds like either a bad vacuum switch, or you have the hoses hooked up wrong.
 
  #9  
Old 04-15-2021, 05:41 PM
Cchey91's Avatar
New Member
Thread Starter
Join Date: Mar 2021
Posts: 7
Cchey91 is on a distinguished road
Default

I figured it out thank you guys it was the vacuum switch stuck on so i replaced it and works perfect.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Kknd310
2nd Generation S-series (1995-2005) Tech
1
08-05-2015 10:35 PM
blz_22_75
2nd Generation S-series (1995-2005) Tech
4
02-25-2013 09:41 PM
kevinph
2nd Generation S-series (1995-2005) Tech
10
12-20-2010 04:58 PM
deegan26
2nd Generation S-series (1995-2005) Tech
2
12-15-2009 12:47 PM
carlo
2nd Generation S-series (1995-2005) Tech
3
08-01-2007 11:01 AM



Quick Reply: 4x4 problem actuator always has vacuum on it even in 2hi



All times are GMT -5. The time now is 05:36 PM.