2002 Chevy Blazer 4-wheel drive won't disengage

AWORLEY

MEMBER
2002 CHEVROLET BLAZER
6 CYL
4WD
AUTOMATIC
78,000 MILES

When my blazer is in 4-hi it won't disengage into 2-wheel drive when I push the button. After about a minute or so it will finally disengage, making a really loud noise like I hit something on my under carriage. The only way I can get it peacefully get it out is to put it in reverse, drive in reverse, then back into park.

4 Replies

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi:
Placing the car in reverse isn't uncommon to shut down the 4wd. Is this something new?

Joe

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Monday, March 2nd, 2009 AT 7:32 PM

AWORLEY

MEMBER
1 POST

It is automatic 4-wheel with push button. It is supposed to be able to switch over while driving under 45 mph.

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Monday, March 2nd, 2009 AT 8:18 PM

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

The only thing that I can think of that could cause the problem is if the 4wd actuator on the transfer case isn't working properly. I would suggest removing the actuator to see of it is fully functional or if it is sluggish, delayed.

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+1

Monday, March 2nd, 2009 AT 8:48 PM

ROCKBOTTOM222000

MEMBER
12 POSTS

I dont think its the actuator but you can test it. More than likely the 4x4 switch is going bad. Its relatively easy to replace. It just screws into the top of your tranny.

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Saturday, March 7th, 2009 AT 8:38 AM