Jump to content

92 Sierra Stuck in 4 Hi

Chris86

Recommended Posts

Chris86 Enthusiast

Chris86

Posted
Posted

My 1992 Sierra dies not seem to want to disengage from 4-Hi.

 

I attempted to back out of my driveway in 2-Hi and could not get through the snow bank, so I popped it into 4-Hi, got through, and decided to drive 3.5 miles in 4-Hi before switching back. 

 

It did not want to switch back after the shifter was in place for 2-hi. I can get it into 4-low and 4-hi, just not 2-hi. I completed my errand and returned to my camp, drove about 12 miles in total like that.

 

I've checked all my fuses, and once day breaks tomorrow I will check to see if the back tires are spinning while in 4-hi.

 

Is there anything I can do to coax it back into 2-hi? What are the potential causes to this? I am at my camp right now and far from any garage. I would have to hit highway to get to one, and I don't want to do that stuck in 4-hi. 

 

Any help would be greatly appreciated

Chris86 Enthusiast

Chris86

Posted
  • Author
Posted

Okay, I have been reading all I can about solutions all over the place, and came across this advice on a 4Runner forum:

 

Put it in reverse and back it up about 20 yards, then try to re-engage the shifter into 2-hi.

 

I did exactly this, and now as I would pass the shifter over the 2-hi slot it would give off this very low grinding or rubbing noise which was not happening on my previous attempts. I had to pass over the 2-hi Mark a couple of times, each time producing that sound, before I felt it bite and the rear wheel lights flash on, with that damn 4x4 light going off, thank God. Took it for a little spin and all is well. 

 

I now have the fear to never put it in 4x4 again. Is there something that can be causing this? I am not accostomed to these GMC trucks so I have a lot to learn. I know the transfer case has low mileage and the fluid is topped, other than that I don't know the systems history.

1513735781472687996645.jpg

Logan Lanfear Enthusiast

Logan Lanfear

Posted
Posted

What happens when you try and shift when the truck is in nuetral or not running at all?  Im not super familiar with these cases but I believe that they are NP241's.  Sometimes they have problems with the drive chain slipping or fluid levels being low when in use.  

Chris86 Enthusiast

Chris86

Posted
  • Author
Posted

I was googling around and it does seem that the transfer case is an NP241

 

When this first happened, I would be in Park or Neutral when I was trying to disengage the 4-Hi and go into 2-Hi. It took at least 2 dozen attempts to get it back into 2-Hi. The only thing happening I guess would be the shifter would be very stiff when I'd move it up to the 4-Lo area, and the light grinding noise when I'd pass the shifter just over the area after(going up) the 2-Hi area.

I said I had the fear to put it back into 4-Hi, but this morning we got another huge dumping of snow, so I decided to brave it. And again I had the same amount of difficulty in re-engaging it back into 2-Hi after getting back home. Backing up about 20 yards and shifting seemed to work last time, but not this time. In the end I noticed that the grinding noises that seemed to accompany being able to put it back into 2-Hi the first time were not there. So I just drove it forward a few feet, then backed it up a few feet, shifted, nothing. Repeated the foward and reverse then stop a second time and the grinding noises were back as I'd shift, and it finally locked into 2-Hi.

 


 

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • tjonesdfw
      2027 GMC Sierra: Official Discussion

      By tjonesdfw · Posted

      Whoever greenlighted the work truck matte black front bumpers on every trim but the AT4X should be fired!  I was hoping that was an AI mistake, but just realized they were on every model of the 2027 Silverado too.     Some parts of the interior do look premium, but the Denali Ultimate dashboard looks like an afterthought.  At least they appear to have lost the microfiber the high end Silverado models showed, but the '27 High Country dash looks better than the Denali.  
    • bluev8
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By bluev8 · Posted

      New member here. I am researching a read-first event-recorder concept for late-model GM V8 trucks. This is not a sales post. There is no product link, price, preorder, or mailing list. I am trying to determine whether the underlying problem is real before building anything.   Has your truck ever had a brief problem such as: - rough running or a momentary misfire - an oil-pressure warning or unusual pressure event - reduced power or a brief stall - a U-code or lost-communication problem - a symptom that disappeared before the dealer or independent shop could reproduce it   If so, I would appreciate the following details: - year, model, engine, and mileage - what happened and under what conditions - whether a DTC and useful freeze-frame data were stored - whether the shop was able to reproduce it - what the eventual confirmed repair was, if known - what additional information would have helped the diagnosis   The concept being evaluated is a removable leave-in recorder that continuously retains a rolling window from before and after an event. It would not tune, reflash, clear codes, or change the vehicle calibration.   I am also not claiming that it could predict lifter failure or see every internal ECM variable.   The real question is whether continuous event history would add enough useful evidence beyond freeze frame, GDS2, and existing scan tools — or whether it would simply be another unnecessary gadget.   For owners and technicians, which problem would make something like this genuinely useful: 1. intermittent misfire or AFM/DFM-related behavior 2. oil-pressure events 3. lost communication or electrical faults 4. none of the above Please be blunt. Negative feedback is just as useful as positive feedback.
    • Atlas
      2027 GMC Sierra: Official Discussion

      By Atlas · Posted

      No tears over the SLE and SLT trim levels disappearing but I kind of loathe the "Elevation" name. It's a truck--skip the elegance.   The slab-dashboard design is decidedly different. Almost has a Hummer flavor to it. "Professional Grade" seems to be leaning very white-collar, tech-driven these days moreso than blue-collar, functional design.   The Silverado would be my choice between the two new trucks. Pleased with the engine lineup in both. The GMC is a little "too much" for a truck, IMO, and the Denali borders on ridiculous - but I do know there are buyers for luxury trucks out there. It's just not my speed.
    • GMCustomerService
      Electrical problem

      By GMCustomerService · Posted

      Your safety is of utmost importance, @joshua1221, and we understand the importance of having all your lights working in your truck. If you have not already, we highly encourage you to bring your concerns to the attention of your local GM dealer. They are in the best position to diagnose your concerns as well as confirm the compatibility of the mirrors with your truck. Additionally, we would like the opportunity to explore any way we may be of assistance. When you have a moment, please visit: https://s.gm.com/support-request and fill out the support request form with all pertinent details. This form helps our team gather the right information and ensures your request is routed appropriately.
    • newdude
      2027 GMC Sierra: Official Discussion

      By newdude · Posted

      - I like the outside but not as much as the Chevrolet.  They ICE'd the EV styling and it works, but I think exterior goes to Chevy on this one.     - SLE and SLT dead = Not.  Surprising.  Fits into the rest of the GMC lineup like this which (aside from Pro) matches the rest of the family.  Elevation, AT4, Denali.     - Interior.  Sophisticated Malaise era.  Why do I say Malaise?  Drawn with a ruler.  Rectangles everywhere.  Looks very premium though.    

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...