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I have a 1989 Chevy 2500 4x4. I put it in 4 high and it feels like it is only engaging on one side of the front end. I still have some grip up front but the pickup pulls back and forth on the road.

1989 Chevrolet 2500 4x4

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  • Contributor
  • 14 Answers

Bad locking hub.. pull them and clean them.. if you don't use your 4x4 often, they have a tendency to stick. even the electric hubs get gummed up.

Posted on Jan 11, 2013

  • jthompson962
    jthompson962 Jan 11, 2013

    Thanks I'll give that a try. Also it seems to take an unusually long time to disengage if that gives you any other ideas.

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6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 1993 Chevy 1500 pickup 4-wheel drive

I replaced the malfunctioning “thermal actuator” with the “Warn” Vacuum actuator setup, it’s been working great for about 7 years now, simple install, if I remember correctly, it was about $150.
That’s what engages the front diff into 4wd.

Posted on Nov 25, 2008

LAYNRAIL
  • 18 Answers

SOURCE: FRONT END VERY LOOSE HARD TO KEEP ON ROAD

They are also bad for the center link in the steering going south, as well as the idler arm.

Posted on Jan 16, 2009

  • 1509 Answers

SOURCE: 1998 Chevy S10 front axle will not engage when put into 4 wheel

Normal thing that happens as long as onone (worked) on it, is the vacume hose going to the engage sevevo under the battery box has fell of on either end or is brocken on the way there. Then the once or now leaky battery acid ate up this same servo. then the cable going to the front axel breaks sticks falls off or even someone needing one climbed under your truck while parked somewhere to get one to replace their brokeen one now you don't have one then theaxel engage arm or gearset is damaged

Posted on Aug 16, 2009

  • 1 Answer

SOURCE: I have a 1990 K1500 4X4 Chevy pickup that wont

I had the same problem on my 90 K1500, it was the 4 wheel drive actuator unit itself. Bout it at the local parts store for 30 bucks and installed it in 10 minutes or less - and vavoom! 4 X 4 back in business.

Posted on Sep 28, 2009

wracefans24
  • 1985 Answers

SOURCE: 98 suburban LT 4x4

check the front axles,it sounds like they are binding up in a turn

Posted on Dec 09, 2009

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I have a 19934x4 bought it with 4 wheel drive notworking. indicator lights for 4x4 would notlight up but transfer seemed to be shiftin ok. frontaxel woul ot ingauge. I repled the front axel actuator an works fine now no problem. actuator is on the passenger sid back of the front axel pigand has a plug, mine was 2 wireroundpin plug but some have a flat pin 4 wire plug. 70 dollars at NAPA. wasa realy simple replacement didnt even need to jack up the truck. the actuator h a pin that electronically puses out engauging te front axel. a easy test is to put the truck in 4 wheel high. holdthe brak and givei little gas ad havesomeoneelse stand to the side ofthe front of the truck and see if the front axel spins. ifso th actutor is te most likely prblem. hope this helps.

Dec 11, 2009 | 1993 Chevrolet K2500

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Not sure if the hubs are engaging?


Well, the best way is to place the vehicle on a hoist and raise all 4 wheels off the ground and put it in 4WD and see if all the wheels start turning.

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4 Low should be easily distinguishable from 4 High as well as 2 Whl when you accelerate and it feels like the transmision is stuck in low gear and the engine starts screaming for mercy at high RPM and you are only doing 30 MPH.

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I have a 1990 K1500 4X4 Chevy pickup that wont engage into four wheel drive. I bought the truck from a friend who had just replaced the actuator on the front end but that did not cure the problem. The...


I had the same problem on my 90 K1500, it was the 4 wheel drive actuator unit itself. Bout it at the local parts store for 30 bucks and installed it in 10 minutes or less - and vavoom! 4 X 4 back in business.

Sep 27, 2009 | 1990 Chevrolet K1500

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1998 Chevy S10 front axle will not engage when put into 4 wheel


Normal thing that happens as long as onone (worked) on it, is the vacume hose going to the engage sevevo under the battery box has fell of on either end or is brocken on the way there. Then the once or now leaky battery acid ate up this same servo. then the cable going to the front axel breaks sticks falls off or even someone needing one climbed under your truck while parked somewhere to get one to replace their brokeen one now you don't have one then theaxel engage arm or gearset is damaged

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Hope this helps

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