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Highway/Dry pavement driving in 4hi

Discussion in 'Technical Chat' started by emmitt, Jan 27, 2009.

  1. Jan 27, 2009 at 2:43 PM
    #1
    emmitt

    emmitt [OP] Active Member

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    I'm wondering why there is nothing in the manual (I've been through it cover to cover) and nowhere does it say not to drive at highway speeds,on dry pavement in 4hi. I have read alot of the threads regarding this (some great info. for sure) but if damage was that probable, I would think someone should have noted it. Any thoughts..................:confused:
     
  2. Jan 27, 2009 at 3:36 PM
    #2
    Delmarva

    Delmarva Mayor of TW

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    Nada, Zip, Zilch, Nothing
    I don't think it's that big a deal honestly. Did it in my Durango on Icy days in TX.
     
  3. Jan 27, 2009 at 3:38 PM
    #3
    Janster

    Janster Old & Forgetful

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    It also doesn't tell you what conditions you need to use 4WD in or I'm pretty sure the manual doesn't explain when/where to use the locker either.

    If they had to explain everything - the manual would be too damn thick (and who reads the manual anyway?)
     
  4. Jan 27, 2009 at 3:45 PM
    #4
    Dustin03

    Dustin03 The Cooler King

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    It's probably not that big a deal, but I still like to err on the side of caution. I've kept my truck in 4hi a few times on icy roads, but I never get over 50 miles per hour, just for the sake of making myself feel better about it.
     
  5. Jan 27, 2009 at 4:16 PM
    #5
    NAAC3TACO

    NAAC3TACO Just east of crazy

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    Maybe someone smarter than me can elaborate, but I think the main problem with using a part time 4wd vehicle on dry pavement is turning. I believe it can bind the front axles and cause cv joint damage. I can't see how going in a straight line could hurt anything. JMO.
     
  6. Jan 27, 2009 at 4:38 PM
    #6
    sonjay

    sonjay Well-Known Member

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    Your on the right track, the difference between our part time system and an all wheel drive system is a centre locking diff, on our part time system when you flip the switch to 4x4, it locks the centre diff to what ever power split it is 60/40, 50/50 I'm not sure? Either way your front wheels are going to try turn a slightly different speed from the rear, from cornering ect. this difference causes binding. The system is designed to operate within these conditions to an extent. Increased heat and wear will be unavoidable though. On an AWD system the front and rear are not locked together in the same way, some like Land Rover have a locked position for better traction off-road. I wouldn't recommend driving on dry pavement for extended periods in 4x4. People do it drag racing and such, but they also break things.
     
  7. Jan 27, 2009 at 4:48 PM
    #7
    emmitt

    emmitt [OP] Active Member

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    Thanks for the input and explanation. I've probably only gone 150 miles,all highway so................ Great forum!!
     
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