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4wd Question

Discussion in '2nd Gen. Tacomas (2005-2015)' started by PPower05, May 11, 2010.

  1. May 11, 2010 at 8:15 PM
    #1
    PPower05

    PPower05 [OP] Well-Known Member

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    Hi all,
    I am the proud new owner of a 2010 tacoma (TRD, SR5, V6).... I was skimming through the owner's manual, and saw where it says to drive atleast 10 miles every month while in 4wd.... I have no real plans to go off roading with the truck, and was under the impression that driving in 4wd while on road surfaces actually can hurt the truck???
    Thanks!
    PS- I also attempted to do a search, however, found nothing...
     
  2. May 11, 2010 at 8:20 PM
    #2
    PPower05

    PPower05 [OP] Well-Known Member

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    I am a firefighter in the Washington DC area, and needed a vehicle that was going to be able to deal with snow...... (We dont get liberal leave if a blizzard comes through!)
     
  3. May 11, 2010 at 8:34 PM
    #3
    Tillers_Rule

    Tillers_Rule ......................

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    Or find a dirt road to drive down:)
     
  4. May 11, 2010 at 8:36 PM
    #4
    PPower05

    PPower05 [OP] Well-Known Member

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    Why can you not turn??? I guess I am gathering that it shouldn't be run down the highway (even though it says you can engage from 2 to 4H so long as you are below 62 mph??? And what is the logic behind only in the rain??
     
  5. May 11, 2010 at 8:55 PM
    #5
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Driveline bind. Being in 4wd links the rear and front drivelines to turning at the same speed. On dry pavement you will have maximum traction. When you turn, the front wheels will spin at a different speed than the rears (especially at full lock). This is why you don't run 4wd on dry pavement. It is however, ok to run it on dry pavement in a straight line.
     
  6. May 11, 2010 at 9:07 PM
    #6
    Drewboto

    Drewboto Well-Known Member

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    When you take a turn, the outer wheels (and sometimes front) spin at a faster pace to keep up with wheels on the inside of the turn. When 4wd is engaged, the rear wheels are "locked" together at the same speed. The wheels cannot turn independantly which will cause binding on pavement but not on wet pavement, mud or dirt because traction is reduced and the wheels can slip a little bit
     
  7. May 11, 2010 at 9:11 PM
    #7
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    There is plenty of slippage in rain for 4wd use. In fact, there are several members who use the rain for this exact subject matter. It won't make driving in the rain more difficult. How much rain do you get in Chino Hills? I would suggest trying it next time it rains, even if it is just down the block. :rollseyes:
     
  8. May 11, 2010 at 10:55 PM
    #8
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Please don't assume anything as I don't use 4wd in the rain nor did I say I did. The whole purpose of my post was to show it is ok to use 4wd in the rain for the purpose of lubing the front diff. If you really want to get technical, the ADD system is an axle disconnect. The driver's side is still connected to the diff and since the hub is locked, the diff is turning even when 4wd is not selected. Toyota throws the "engage 4wd to lube the diff" as a CYA statement.
     
  9. May 11, 2010 at 11:11 PM
    #9
    rhodehard09

    rhodehard09 sometimes nonsense is the only sense someone has

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    along with others on here i put it in 4x4 every time it rains just to keep things lubed up.
     
  10. May 12, 2010 at 10:59 AM
    #10
    David K

    David K Well-Known Member

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    My goodness... it is so easy and not a problem... 4WD on pavemnet is okay if the road is wet (allows slippage if you make turns)... 4WD in a straight line is okay, too if the road is dry. As said above, in a PART TIME 4WD system the front and back driveshafts are locked together and in turns, they need to rotate at different speeds... slippery roads allow this. FULL TIME 4WD (aka ALL WHEEL DRIVE or AWD) have a center or third differential that allows the two drive shafts to rotate differently.

    You don't 'need' 4WD when it rains, it is for the benefit of those in the city who are unable to use 4WD on dirt roads at least 10 miles per month.

    This 10 mile per month is a recomendation, not a must. We could probably go 6 months in 2WD and the 4WD will still work, IMO.
     
  11. May 12, 2010 at 4:56 PM
    #11
    jeremy.allen

    jeremy.allen Well-Known Member

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    i drive in 4wd hi on dry pavement every once in a while just so i can make sure it gets used like the manual says. unless you have a front locker (not available from toyota on these trucks) there is no reason to worry. just avoid turning to full lock or you will get the binding and a little jerking in the steering wheel.
     
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