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Low range 4x4 problems

Discussion in '1st Gen Tundras (2000-2006)' started by ethan1911, Nov 7, 2018.

  1. Nov 7, 2018 at 7:06 PM
    #1
    ethan1911

    ethan1911 [OP] New Member

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    Dana 44 sas, 63” Chevy springs, shackle flip, 4.10 gears
    Does anyone have a diagram of the wiring for the 4x4 in our trucks. My 4 low won’t engage but 4 hi works fine, any ideas what’s wrong. I suspect it has something to do with the wiring that ran to the front axle. Also is there a mechanical twin stick shifter available for tundras I prefer that over push buttons.
     
  2. Nov 7, 2018 at 7:12 PM
    #2
    Casper421

    Casper421 Adventure in a 1st gen

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    @jberry813 probably has the diagram, if not memorized and info on twins.
     
    Sunnier and ethan1911 [OP] like this.
  3. Nov 8, 2018 at 10:20 AM
    #3
    Baller

    Baller New Member

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    I don't have an answer to your question but, wouldn't it wiring to the transfer case, not the front diff?
     
  4. Nov 8, 2018 at 10:37 AM
    #4
    ethan1911

    ethan1911 [OP] New Member

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    There are wires that run to the front diff I suspect there for a sensor that tells the transfer case if the front diff is turning or not. I know it has to read 4hi before 4low will engage and I think that’s what the sensor in the diff is for.
     
  5. Nov 9, 2018 at 10:52 AM
    #5
    bmf4069

    bmf4069 New Member

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    Aren't those wires just to engage the front diff actuator? I'm just guessing, I have no idea.
     
  6. Nov 10, 2018 at 9:58 AM
    #6
    ethan1911

    ethan1911 [OP] New Member

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    You could be right. I’m really not certain what there for.
     
  7. Nov 10, 2018 at 10:56 AM
    #7
    Baller

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    This is what I thought. I'm pretty sure they don't have anything to do with what gear the Tcase is in.
     
  8. Nov 10, 2018 at 10:59 AM
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    bmf4069

    bmf4069 New Member

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    I'm guessing it's in the tcase itself. Whatever shifts between hi/low. You are engaging 4lo properly? Come to a stop, shift to neutral, push button, put it back in drive?
     
  9. Nov 10, 2018 at 11:03 AM
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    Baller

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  10. Nov 11, 2018 at 12:56 AM
    #10
    ethan1911

    ethan1911 [OP] New Member

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    Yes I’m shifting it properly ive had the truck for over 4 years so I know how to shift it. I haven’t had 4low since I put in my Dana 44 front axle and the only thing that’s not hooked up is the plug that goes to the factory diff. I used 4low on a regular basis before the swap.
     
  11. Nov 11, 2018 at 7:59 AM
    #11
    Baller

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    The most suspicious part is that your 4hi works. I'd think if the front diff were keeping track of what gear the tcase is in, it would be doing the same in 4hi.
     
  12. Nov 11, 2018 at 8:09 AM
    #12
    15whtrd

    15whtrd I tried being reasonable, but I didn't like it.

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    From what I’ve read, it sounds like there is a separate set of wires. 1 sensor for 4 high and 1 for 4 low. It sounds like they let the computer know when it is fully engaged In each. Could be something wrong with the actuator itself. Could be something wrong with the sensor. I don’t see why there would be something wrong with his differential but it sounds like he’s switched to a solid axle? I’m not exactly sure how that would affect what the transfer case does. I’m assuming that where you place the new front sensor in the solid axle is not talking to the computer to let the actuator know to switch into four low.

    I’m just shooting out ideas here.
     
    Last edited: Nov 11, 2018 at 8:18 AM
    NewImprovedRon likes this.
  13. Nov 11, 2018 at 8:09 AM
    #13
    Dmas

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    Could be a faulty switch as well, try getting a used one cheap from ebay and try it, just another idea.
     
  14. Nov 11, 2018 at 3:16 PM
    #14
    ethan1911

    ethan1911 [OP] New Member

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    I got my 4 low issue fixed today. I had to ground the green wire in the the diff actuator plug so the computer thinks I have a diff actuator now the transfer case works like it did with the stock front end.
     
  15. Nov 11, 2018 at 3:17 PM
    #15
    Baller

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