4WD on Dry Pavement

Discussion in '6.9L IH & 7.3L IDI Diesels' started by adamsanders, Jul 9, 2018.

  1. adamsanders

    adamsanders Full Access Member

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    I had a quick question for the forum. I've been using my truck to tow my boat to and from the lake. Its a single cab long bed so it tends to spin the tires pulling the boat off the ramp (even just the trailer for that matter), so usually I have to kick it down into 4WD for a second to get moving. My girlfriend has been operating the truck lately and because its a 5 speed and she doesn't daily drive it, she'll kill it on the ramp occasionally. Our boat ramp is crazy crowded on the weekends with crowds of people standing around basically watching people struggle on the ramp haha. Anyways, would it hurt anything if we were to put the truck in 4 Lo and pull it off the ramp? This makes it way easier to pull out as well since in 4 Lo you basically can just let off the clutch. There would be very slight turn involved which is really the only part that has me concerned. Thanks for the input
     
  2. The_Josh_Bear

    The_Josh_Bear Registered User

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    wont hurt it at all as long as your front tires have the same or more tread on them as the rears. As soon as she can have her stop and shift into 2hi and you don't even need to mess with the hubs until you're out of the way.
     
  3. 79jasper

    79jasper Chickenhawk

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    I would say air pressure would play more than tread wear.
    And no turning. Straight is fine.

    Sent from my SM-G892A using Tapatalk
     
  4. mblaney

    mblaney Full Access Member

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    I think your description is a little unclear. Previous responses suggest your hubs are locked... I think you want to leave the with the hubs unlocked, and use the gearing of 4 low to pull the boat out.

    If this is the case then tire size or pressure don't matter, only that you are driving the front axle without them being engaged at the hub. For what you are doing (basically straight out and for a short distance and slow speed) I say fine! The hubs (the locking part) are not designed to support spinning axles; going straight ahead everything will be rotating at the same rate. Avoid tight turning.
     
  5. adamsanders

    adamsanders Full Access Member

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    No the hubs would indeed be locked in. If they aren't, the truck spins pretty hard coming up the ramp. One time years ago, I got my dads 1972 F250 bound up so tight from moving it in 4WD on dry pavement that it was undriveable until we moved it over in the grass and got all the wheels spin. I just don't want to encounter anything like that in front of a crowd of people.
     
  6. pelky350

    pelky350 Full Access Member

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    I don't see what would hurt about a straight line if using 4x4L with hubs locked to get up the ramp, I wouldn't turn very much the truck will defiantly tell you it's not happy lol I use 4L to back up trailers sometimes with hubs unlocked since my zf5 has some crazy tall reverse gear and 3.55+35's just idling reverse is like 10mph, ain't nobody backing a trailer That fast lol
     
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  7. MtnHaul

    MtnHaul Supporting Member Supporting Member

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    I use 4-Low with hubs unlocked, so basically 2-Lo, all the time. Have you tried that on the boat ramp?
     
  8. nostrokes

    nostrokes Full Access Member

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    Sounds like the boat ramp needs some work, a little roughing up goes a long way for grip!!

    I wouldn't think just going strait would hurt anything. If it was me I'd use 4 hi, get the boat up the ramp stop for a second and pop it into 2wd and get out of the way.
     
  9. 79jasper

    79jasper Chickenhawk

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    May not get a ton of wheel spin that way either.
    Might as well try it. May not need to lock the hubs.

    Sent from my SM-G892A using Tapatalk
     
  10. Macrobb

    Macrobb Full Access Member

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    I've done 4x4 on dry pavement before, it's just kind of jerky when turning a corner as the tire eventually slips. Try to keep it straight and you won't notice anything, then just put it in 2wd once you are on flat ground.
     
  11. towcat

    towcat Administrator Staff Member

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    4wd locked ok going straight and EASY turns. you do a tight turn and something will eventually break.
     
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  12. Runningaford

    Runningaford Registered User

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    Yup, I use my truck a lot of the time just like Towcat describes, and it works.
     
  13. IDIoit

    IDIoit MachinistFabricator Supporting Member

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    this is a sad post.
    the burnouts are half the show when boatramp watching!
     
  14. hce

    hce So can i.... Supporting Member

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    The other half is the husbands yelling at the wifes to do it this way, and the wifes yelling back I AM.
    If leaving the truck in 4 low keeps her happy, put the truck in 4 low and do not worry about it.
     
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  15. IDIBRONCO

    IDIBRONCO IDIBRONCO

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    That's the most important point right there. I've seen a lot of boat docks that had moss on them and 4x4 was a must. On July 4, I saw a boat dock that was so steep that trucks/SUVs weren't allowed on it. It was called a tractor boat ramp. It was steep enough that I wouldn't have wanted to try using my truck on it.
     

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