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Can I shift from 2HI to 4HI while moving?

Discussion in '1st Gen. Tacomas (1995-2004)' started by veg hed, Dec 15, 2010.

  1. Dec 15, 2010 at 5:56 AM
    #1
    veg hed

    veg hed [OP] Well-Known Member

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    So I assume I can shift from 2HI to 4HI in my 2004 Taco when moving, but at what speed is safe? It seems like my old 94 Toyota had something on the sun visor that said up to 55? Or maybe that was how fast it was safe to drive in 4HI. I can't remember...Thanks
     
  2. Dec 15, 2010 at 6:00 AM
    #2
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Up to 62 MPH......................if you wanna shift at 88 mph, you'll need a flux capacitor.
     
  3. Dec 15, 2010 at 6:04 AM
    #3
    veg hed

    veg hed [OP] Well-Known Member

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    Then I'll go BACK,,,TO THE FUTURE!!!
     
  4. Dec 15, 2010 at 6:19 AM
    #4
    Max-4_Yota

    Max-4_Yota The Welfare Cadilac

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    Yes, assuming your not on pavement.
     
  5. Dec 15, 2010 at 6:20 AM
    #5
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    5100's all on fours
    You can shift on pavement too.
     
  6. Dec 15, 2010 at 6:37 AM
    #6
    kingston73

    kingston73 Well-Known Member

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    What he said, the manual doesn't specify where you can and can't shift, just the max speed you can do it at.
     
  7. Dec 15, 2010 at 6:41 AM
    #7
    Gregero

    Gregero TRD: Trail Ready Development

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    you'll need to get a hold of some plutonium as well :)
     
  8. Dec 15, 2010 at 6:43 AM
    #8
    84Hilux

    84Hilux Well-Known Member

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    Yeah, I've done it on the highway when black ice conditions exist. Usually you are not going full speed at times when you need increased traction anyway. You don't want to use 4WD on dry pavement, since it stresses the drive train.
     
  9. Dec 15, 2010 at 7:03 AM
    #9
    veg hed

    veg hed [OP] Well-Known Member

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    98tacoma27 said, "62" I was thinking 55, which is in the ball park.

    So what is a safe speed in everybody's opinion?

    I usually go back and forth if I am on pavement and there are icy patches. If it's icy then I'll shift to 4HI while I'm rolling, then if the ice ends I'll go back to 2HI while I'm still rolling.

    I did this this past weekend and was just wondering if it was okay to do.
     
  10. Dec 15, 2010 at 7:24 AM
    #10
    Caduceus

    Caduceus Well-Known Member

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    4-anything doesn't help in ice. It helps in snow/sand/etc, but ice is essentially friction-less. So slow down and try to avoid what you can see. 4x4 does NOT equal invincible.

    You can switch under 55 (I thought the manual said this too). In fact, you're supposed to drive about 10 miles monthly in 4-hi to keep stuff lubricated. A straight, dry patch of pavement should be OK for this.
     
  11. Dec 15, 2010 at 7:59 AM
    #11
    98tacoma27

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    The best speed to shift into 4wd is the speed that driving conditions warrant.
    ^this^ also remove your foot from the skinnah pedal to eliminate binding of the drive train when it engages.
     
  12. Dec 15, 2010 at 8:08 AM
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    tnt136913

    tnt136913 Member

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    my 2003 has brake fluid ,, from factory ,, be sure u got the right stuff
     
  13. Dec 15, 2010 at 2:27 PM
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    Stubbs95tacoma

    Stubbs95tacoma Well-Known Member

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    you can but youl mess up your transmission and i wouldnt want to pay for that if i was you =)
     
  14. Dec 15, 2010 at 3:55 PM
    #14
    TacomaJPP

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    As a safe practice, I clutch it and throw it in neutral while shifting the t-case.
     
  15. Dec 15, 2010 at 4:01 PM
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    steve o 77

    steve o 77 braaap

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  16. Dec 15, 2010 at 5:23 PM
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    Wreckless_71

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    Yeah, let off the gas and throw her into 4HI. Gears will mesh just fine when rolling. There isn't a maximum safe speed for 4HI. I have no problem driving 4HI just as fast as in 2HI. Typically you won't be driving like a bat-outta-hell when you have to use the 4HI anyways so it doesn't really matter.
     
  17. Dec 15, 2010 at 6:15 PM
    #17
    tomwadden

    tomwadden Well-Known Member

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    Youre right in the fact that it doesnt really help, but I use it because with how light the back end is on these trucks, even with the lightest foot the back end can come around really quick. So its nice in 4HI you dont have to worry bout the the rears spinning up on ice so easily.
     
  18. Dec 16, 2010 at 9:11 AM
    #18
    84Hilux

    84Hilux Well-Known Member

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    Agreed- I'd rather have the fronts pulling than "just along for the ride" when I start to slide.
     
  19. Dec 16, 2010 at 11:34 AM
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    szembek

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    Yup although usually if I'm going 55 and realize I need 4WD, I also realize that I should slow down.
     
  20. Dec 16, 2010 at 4:08 PM
    #20
    derekp

    derekp giddy up!

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    I looked at the card on my visor (2001 TRD) and it said to keep vehicle speed below 50mph...Not sure if things changed later in the years or not. With the snow/slush/ice today, I did use 4wd a few times on the way home. Once while driving, I switched around 35-40mph and didn't go over 50ish. Mostly didn't have to use 4wd unless starting off on a hill.
     
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