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1998 CHEVY BLAZER 4WD WON'T ENGAGE
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BIGMIKE1
New User
Dec 11, 2010, 8:23 PM
Post #1 of 2
(4436 views)
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1998 CHEVY BLAZER 4WD WON'T ENGAGE
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1998
CHEVROLET
S-10 BLAZER
4.3 LITER
180,000 MILES
I TRY TO PUT MY BLAZER INTO 4-HI, LIGHT(ON BUTTON) BLINKS AND THEN GOES OUT. BUT IT SOUNDS LIKE IT "ENGAGES", BUT FRONT TIRES DON'T SPIN. WHEN I TRY 4-LOW, THE LIGHT BLINKS THEN STAYS LIT. AND AGAIN, IT SOUNDS AS IF THE 4WD HAS ENGAGED. ALTHOUGH THE FRONT WHEELS DON'T SPIN.
 PLEASE HELP. I GUESS WE ARE SUPPOSED TO GET AROUND 12'' OF SNOW BY TOMORROW AM HERE. THANKS FOR HELPING.
(This post was edited by BIGMIKE1 on Dec 11, 2010, 8:29 PM)
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re-tired
Veteran
/ Moderator
Dec 11, 2010, 9:31 PM
Post #2 of 2
(4428 views)
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Re: 1998 CHEVY BLAZER 4WD WON'T ENGAGE
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Its been awhile since i've worked on that year. I believe you have a thermal actuator on the front axle . It expands when voltage is applied (4 wheel drive selected ) it then pushes in a pin and locks the inner /outer halves of the axle and gives you 4wd. THese actuators are filled with a gel that is notorious for slow operation in cold. They make a retro kit that converts it to electric motor. .First check all fuses. then remove actuator and see if it lenghtens when 4wd is selectd , if not and you have pwr to it ,,,,A)find another oem one...... B)Retro it ,,,, C) Find a way to keep the pin in ,,Spacer maybe.
LIFE'S SHORT GO FISH
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