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4x4 dash light

Discussion in 'Chevy Trucks' started by Paintslinger, Feb 12, 2007.

  1. Paintslinger

    Paintslinger Junior Member
    Messages: 9

    I have a 2002 2500hd and I have put a actuator in the front axle.But the truck is still hard to get into 4x4,it has to be backed up around 20 feet or pulled forward about the same.(which make it rough it you are stuck).Also when it finally does engage the light in the dash dosent show it.what could cause it not to want to engage the way it should and the light not work.Thanks
     
  2. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Is your truck push button or floor shift 4WD?
     
  3. carl b

    carl b PlowSite.com Addict
    from Ohio
    Messages: 1,330

    i'll reply mine takes that long too.. its on the floor.. but after i use it a few times it goes in and out much better
     
  4. ThisIsMe

    ThisIsMe Senior Member
    from Mass
    Messages: 745

    Are we talking about Viagra again?
     
  5. carl b

    carl b PlowSite.com Addict
    from Ohio
    Messages: 1,330

    how did you know :realmad: glad that i'm not the only one...
     
  6. carl b

    carl b PlowSite.com Addict
    from Ohio
    Messages: 1,330

    any serous answers? and it gets easier to get in 4wheelwesport
     
  7. Paintslinger

    Paintslinger Junior Member
    Messages: 9

    The shifter is in the floor.I would think it should not have to be moved forward or reverse to get it to engage.(like I said if you already stuck you have to get pulled ).Its like the gears wont line up for it to lock its self in.
     
  8. carl b

    carl b PlowSite.com Addict
    from Ohio
    Messages: 1,330

    after you lock it a few times dose it lock better??? my 94 has never engaged well
     
  9. Paintslinger

    Paintslinger Junior Member
    Messages: 9

    Not really ! I was wondering if I could take the actuator back out and spray some wd-40 in the front end to get things loosened back up if they are sticking.or maybe even get some grease up in there (the axle)?
     
  10. scottL

    scottL PlowSite.com Addict
    Messages: 1,603

    Never wd40 - It freezes.

    There should be two sensors that trigger the 4x4 light. Try putting the truck in neutral before shifting into 4x4 or let off the gas pedal. ( You might even check under the carriage and see if anything is tied up, bent or frozen.
     
  11. lawnmedic

    lawnmedic Senior Member
    Messages: 703

    What's the lube oil in the front diff.? Low fluid level can keep diff. from locking up...
     
  12. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    crb, by any chance is your truck pre '96? If so, yours will have the "thermal linear" style actuator. Some of those can be slower than molasses in January to engage.Do you know you can upgrade to the newer (and faster) electric style actuator that's used on the newer truck's? You can buy the actuator and harness conversion as a kit from GM for less than $150.00.
     
  13. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Paintslinger, The first thing to check is the fluid level in the diff. If these 9 1/4 diff's are run low on fluid the first thing that get's starved for lube is the 4X4 actuator cavity. It sound's like the shift fork or axle collar is binding on their respective shaft's (maybe due to lack of lubrication).When you shift it in 4WD does it stay engaged under a heavy load or has it kicked out on it's own before? If the 4X4 light isn't illuminated when it's in 4WD lead's me to suspect that it's not FULLY engaged which would be caused by the binding shift fork or axle collar.
     
  14. Paintslinger

    Paintslinger Junior Member
    Messages: 9

    I have never had it kick out on me,but i have never had it in a real hard bind.Would the shift fork or axle collar be bent or just a lack of lubrication.The guy who I bought the truck from said he never had any trouble with the 4x4 but the light in the dash never has lit up.
     
  15. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Did you ever ask the preivious owner if it was always slow to engage? Could have been a problem since the truck was new. If their was a slight mismatch between the collar and the axle engagement spline's due to a defective manufacturing process I could see it being hard for the actuator to move the fork/collar assembly since the truck was new. If it turns out that this is a recent problem then I'd suspect either it's low on fluid or the spline's were damaged from a harsh ingagement at some point (ie. pulling it in 4WD while the rear tire's were spinning at a high speed) I'd definitely check the fluid level first though.
     
  16. Paintslinger

    Paintslinger Junior Member
    Messages: 9

    Thanks for the help, the previous owner said he never had any trouble with it .I just asume that it shifted fine other than no light. I'll check the fluid and then go from there.Thanks for the help !!!!!!!!!
     
  17. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Glad to help...let us know what you find when you get a chance to check the fluid.
     
  18. carl b

    carl b PlowSite.com Addict
    from Ohio
    Messages: 1,330

    :waving: thanx , i will try to get one this summer and yes its a 94 :bluebounc
     
  19. 'Rude Dog

    'Rude Dog Member
    Messages: 56

    Summit racing products offers a cable conversion kit that manually actuates the front drive axle- I believe the kit was about 130 bucks- guarantees that the front diff is locked in- if my actuator ever goes out on my '93 k2500, that's what I will put in- mine also has to go forward , or backward about 20 ft to engage- don't ever shut the truck off , on a hill , with a full load of firewood in it, then try to start it up, expecting it to be in 4 wd- learned a quick lesson that day...'Rude Dog
     
  20. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    [QUOTE='Rude Dog;371118]Summit racing products offers a cable conversion kit that manually actuates the front drive axle- I believe the kit was about 130 bucks- guarantees that the front diff is locked in- if my actuator ever goes out on my '93 k2500, that's what I will put in- mine also has to go forward , or backward about 20 ft to engage- don't ever shut the truck off , on a hill , with a full load of firewood in it, then try to start it up, expecting it to be in 4 wd- learned a quick lesson that day...'Rude Dog[/QUOTE]

    Yep they do, their called a "Posi lock". I've installed a few of them.It's a pretty good set up overall but sometime's in the cold the cable will freeze down by the diff and then you have to crawl under the truck and heat it up a little to allow it to engage. They claim the cable is sealed but it doesn't seem to be sealed good enough. If you engage it ahead of time and just leave it engaged during a storm it's fine. It's basically like running and older truck with the hub's locked.