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4 wheel HI or 4 wheel low

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by fireman_1, Jul 9, 2001.

  1. fireman_1

    fireman_1 Registered Member

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    I have a 79 gmc jimmy with a completly stock 350, a 203 transfer case with a part time kit,and a 350 A.T. I've just started to take her out to the sand dunes in pismo california. I started climming in 4 wheel hi. I got around 3/4 of the way up the hill. After that she just didn't have any more. I wasn't spinning out, I just wasn't moving any more. It felt as if it was just to much and the truck was overwellmd. The hill was about 15-20 ft. high and 45 degrees or less. I sat back and watch other tucks take it with eas. So I tried in 4 wheel low I just spinned the tiers in the sand and didn't even really move, just digging down. I also had the tires aired down to 15 psi. So does it sound like a problem or just lack of expierence
     
  2. DMK

    DMK 1/2 ton status

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    What kind of tires do you run? This might have something to do with it. How many miles on motor? Could be wore out.
     
  3. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I recently wheeled some sand for the first time...its definetely a technique thing. I used low range and tried to avoid abrupt changes in power. Smoothness seemed to be the key to sucessfuly climbing some of the hills. 15 psi sounds a bit high for sand, the guys i ran with were all down to 10-12 psi or less. I run bias ply swampers and had mine down to 7 psi...

    Momentum is your friend and steadily increasing throttle as you're climbing seemed to do the job for me. I was usually on the floor near the top. I was also told if it starts to bog down to cut right or left a bit so you're not climbing straight up. Similar to tacking with a sailboat. I was skeptical but tried it and notched my first sucessful climb up a very steep dune! [​IMG]

    Ask a few of the others for tips, its the only way to learn.

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
     
  4. Pugsley

    Pugsley 1/2 ton status

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    Alot of it is technique, like Rene said. Tires play a major role, so does weight. On something that weighs as much as a K5, any tire less than 12" wide is going to dig down, pretty quickly. A good holeshot, and keeping steady speed is all it takes to be "king of the dune"

    <font color=red>Cripplefight!!</font color=red>
    <A target="_blank" HREF=http://pugsley.alloffroad.com>http://pugsley.alloffroad.com</A> Updated finally[​IMG]<P ID="edit"><FONT SIZE=-1>Edited by Pugsley on 07/09/01 00:16 AM (server time).</FONT></P>
     
  5. riz

    riz 3/4 ton status

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    <font color=purple> Steady throttle after a nice launch wit hsome touchy accelaration throughout the run and you should do fine.......tire pressure is a big key too....next time ask those guys who you see going up with ease, they ussually like to bragand will teach you a thing or two.

    L8r,
    . Riz . <A target="_blank" HREF=http://www.geocities.com/rizmonkey>http://www.geocities.com/rizmonkey</A>
     
  6. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    i am one of the ones rene(trusty) was running at sand lake with you can see pics in my albums in the link below titled easter run anyway air down to 10psi 15 is to much for the sand also run the t-case in 4low since you are running a 350 tranny you might try shifting it manualy into second or maybe even first if you are lossing to much momentom close to the top also try turning slightly and going sideways when you start getting close to the top if you have more questions just ask

    77blazer see it at<A target="_blank" HREF=http://community.webshots.com/user/ssmith6333>http://community.webshots.com/user/ssmith6333</A>
     
  7. fireman_1

    fireman_1 Registered Member

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    I just want to thank all of you who replied to my message. I will definetly keep all your advice in mind when I go out today.
    By the way I'm running 33 x 12.5 Kumho Powerguard MT.
    Thanks again.
     

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