1998 Silverado 4wd Issues

Discussion in 'Transfer Cases' started by canuckz71, Nov 24, 2017.

  1. canuckz71

    canuckz71 I'm Awesome

    Messages:
    1,101
    Likes Received:
    9
    Joined:
    Aug 3, 2010
    Location:
    Alberta
    Been a loooooong time since I've been on here. Have had a few trucks since my chevy but have kept it this whole time with a whopping 95,xxx miles.

    Having issues with my 4wd lately (push button shift).

    When i push 4hi i can hear an actuator moving and the 4hi light comes on but the tires don't spin. Can hear the actuator move again when shifting back to 2wd.

    When i put it into 4lo i can feel the diff switching to the low range but again tires don't spin.

    When in 4hi and i spin the tires on ice i can hear something spinning in the front end....haven't had another person around to look and see if the front d-shaft is spinning but i am assuming it is.

    I had 4wd a few weeks ago and now nothing. 4wd actuator maybe? Other thoughts?
     
  2. tinfoil_hat

    tinfoil_hat I'm Awesome

    Messages:
    151
    Likes Received:
    34
    Joined:
    Nov 18, 2016
    Location:
    Sparks, NV
    You are probably hearing the encoder motor on the t-case, not the actuator. Look for a blown 4wd fuse. I forget which number it is in the block but I believe it is 20amp. If the fuse is blown and it just blows again next time you hit the switch it is your actuator. You can also test the actuator very easily. Unplug it, spin it out with a big crescent wrench, turn the key on, plug the actuator back in and hit the button. You should see it extend.
     
  3. canuckz71

    canuckz71 I'm Awesome

    Messages:
    1,101
    Likes Received:
    9
    Joined:
    Aug 3, 2010
    Location:
    Alberta
    Took a pry bar to the passenger side axle and it could move back and forth ~3/4" so i took it out.

    Found the snap ring was broken. Question is....my grandpa has been driving the truck and i noticed he had it in 4wd the whole time. Could this cause any problems? I only found 2/3 of the snap ring....not sure what happened to the other 1/3
     
  4. tinfoil_hat

    tinfoil_hat I'm Awesome

    Messages:
    151
    Likes Received:
    34
    Joined:
    Nov 18, 2016
    Location:
    Sparks, NV
    You should never use 4x4 on dry pavement or other hard surfaces. I think you should pull the diff cover and have a look inside.
     
  5. canuckz71

    canuckz71 I'm Awesome

    Messages:
    1,101
    Likes Received:
    9
    Joined:
    Aug 3, 2010
    Location:
    Alberta
    How tight should the axle shaft be to the bearing and seal? The shaft doesn't really look worn but just one hit from a hammer and it came out of the housing...

    Could be worn shaft?
     
  6. canuckz71

    canuckz71 I'm Awesome

    Messages:
    1,101
    Likes Received:
    9
    Joined:
    Aug 3, 2010
    Location:
    Alberta

    He would have been driving it on snow/gravel roads only going about 30mph max. He just uses the truck to haul water
     
  7. burnhedge

    burnhedge I'm Awesome

    Age:
    37
    Messages:
    103
    Likes Received:
    9
    Joined:
    Mar 7, 2015
    Diff cover?

    Sent from my SCH-R970 using Tapatalk
     
  8. burnhedge

    burnhedge I'm Awesome

    Age:
    37
    Messages:
    103
    Likes Received:
    9
    Joined:
    Mar 7, 2015
    Did this happen after you put in the new snap ring? If so, I'd say something isn't right. I don't think their's should be any play if the snap ring is installed correctly.

    Sent from my SCH-R970 using Tapatalk
     
  9. str8fan7

    str8fan7 Newbie

    Messages:
    26
    Likes Received:
    12
    Joined:
    May 20, 2016
    Location:
    Henderson CO
    if the passenger axle was pulled, there is a good chance the washer slipped down and is not allowing the 4wd to engage. i just had this on my 94. had a place replace the axle seals and after that it wouldnt engage. pulled the front diff completely out and seperated the housing on the passenger side, replaced the washer and put it all back together. 4wd works now. the axle shaft has a tip that rides in the middle of the washer. I got my washer out of a junkyard since it's s dealer item only. the place that did the seals pressed the axle shaft in so it locked in place which is why the section of the washer is missing.

    43182.jpeg
     
    Last edited: Dec 1, 2017
  10. rdimamb

    rdimamb Newbie

    Age:
    59
    Messages:
    2
    Likes Received:
    1
    Joined:
    Nov 30, 2013

    Just for giggles, have you tried to disconnect the battery off for about half an hour or so and then reconnect it? My 98 truck had similar issue and once I disconnected and reconnected the battery it all worked fine. Just another thought.
     

Share This Page