Question about 1998 GMC Sierra

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Why 4x4 doesn't turn all 4 wheels at same time? 4hi-4lo

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Ted Maxwell

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4X4 actually provides power to the front 2, and the back 2.
Unless the back has limited slip or posi-track, if 1 wheel spins, the other will not turn.
Since the front wheels have to turn at different rates to accomodate turning radius differences, there is (usually) to limited slip on the front differential, so if one wheel spins, the other will not turn.
So, if you have one front wheel spinning at the same time as one back wheel is spinning, and you don't have posi-trac, you're stuck.
Cheerfuls.

Posted on Nov 12, 2015

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5 Related Answers

Anonymous

  • 1 Answer

SOURCE: I have a 97 jimmy

i have problem with transmition 4 time i change it agine its not working only in ferst gare 2 3 4 not working

Posted on Sep 10, 2008

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jamie

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SOURCE: The four wheel drive in my 2001 gmc sonoma

sounds like a burnt out reley or switch check the fuses and wires to the transfer case

Posted on Jan 03, 2010

Anonymous

  • 2 Answers

SOURCE: My 4x4 switch the lights are not showing at all

check fuse?

Mine did this but all of a sudden started to work again after about a week

Posted on Aug 03, 2010

Anonymous

  • 1 Answer

SOURCE: I have a 2003 GMC Sonoma Crew Cab 4x4 - the 4WD

03 sonoma will not go in 4hi but will go in 4lo

Posted on Jan 12, 2011

RLtoFixYa

  • 52 Answers

SOURCE: 1997 GMC Yukon 4-wheel drive electronic

Dave,
The problem your are speaking about could be a few things. All things that are somewhat common to go bad on Chevys/GMCs. Each one of the cars I worked on had a different problem. I have changed the switches, the 4wd solenoid, and TCM on different trucks. IMO the TCM location in the passenger kick panel is a poor location allowing water and other passenger debris to get into it. Once water gets in that area you can imagine already what occurs. One of the cars the TCM bracket was rusted by the ground and eventually the weak ground fried it. The weird thing is the TCM would allow it to shift sometimes and not other times or partially engaging causing the wonderful light to blink rapidly. What I have found of some time with these trucks is pushing the button to change the truck to two wheel drive and driving a few feet in reverse helps ease the change.

So you can start with a new switch that pops in and out of the dash in a few mins. Can get one on ebay for under 25 dollars. Although, I personally would take off the kick panel and take a look at the TCM. If you see any rust around it, my money would be on that.

Good luck

Posted on May 26, 2011

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I guess you probably don't know what transfer case you have ?
SERVICE 4WD
Refer to
?€¢
Transfer Case Description and Operation in Transfer Case - NVG 149-NP3


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Transfer Case Description and Operation in Transfer Case - NVG 246-NP8


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With the info I've given you ,you should be able too now !
There is probably a code stored somewhere !
DTC B0790 DTC B2725 DTC C0300 DTC C0305 DTC C0306 DTC C0321 DTC C0327 DTC C0359 DTC C0374 DTC C0379 DTC C0550.

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