Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Thread: Driving uphill on slicks

  1. #1
    Gascoigne Guest

    Driving uphill on slicks

    Running on Goodyear MTR's, centre diff locked, low-range second, I went down into gully. Heading up other side (~35 degrees) suddenly lost traction and started sliding back and sideways towards drop-off on the edge of the track. Chocked it with log and had another go - successfully managed to slide back further. Fortunately stayed where it was on the brakes, walked back and got father-in-law's Jackeroo which we winched up onto to get out.

    Clay soil, covered by blady grass, and it had rained lightly the night before. Had had no problem up until that point, though.

    Checked the tyres - the tread was full of thick, gluey clay - looked like slicks. Had to clear it out with sticks.

    Bit of a newby to 4WDriving so any comments/suggestions welcome particularly regarding the clagging up of the tread and driving technique in that situation (in retrospect I should have walked the gully first - as it turned out it was even slippery to walk on). I have a rear diff-lock but it wasn't engaged (too late once on the hill) - should I have had it on?

    Cheers

    Gascoigne

  2. #2
    Join Date
    Jul 2003
    Location
    Sydney's gritty inner west (2204) and verdant Mount Wilson
    Posts
    7,446
    Total Downloaded
    0
    Ultimately regardless of any traction aid (difflocks) if your tyres can't transfer torque to the road surface you have no hope.

    Tread pattern and tyre pressures are significant.... then momentum.

    Some times oscillating the steering left to right enables the edge of the tyres to grab.... also a lowered tyre will put more tyre on the track.
    Mahn England

    DEFENDER 110 D300 SE '23 (the S M E G)

    Ex DEFENDER 110 wagon '08 (the Kelvinator)
    http://www.aulro.com/afvb/members-rides/105691-one_iotas-110-inch-kelvinator.html

    Ex 300Tdi Disco:



  3. #3
    Join Date
    Jan 1970
    Location
    Wheelers Hill, Melbourne
    Posts
    4,085
    Total Downloaded
    0
    Give it a bit of stick- that usually throws off the gunk, hopefully you keep forward motion at the same time. Best to do it b4 you really need to.
    Sometimes I have to dis-engage my front diff lock so I can keep up with others who dont have them, but similar tyres. The reason is as above, with all four wheels getting traction, I go slower because the clay builds up on the treads.
    Cheers
    David

  4. #4
    Join Date
    Jan 1970
    Location
    Hobart, Tasmania
    Posts
    897
    Total Downloaded
    0
    Contrary to popular belief, Goodyear MTR's are NOT generally good in mud. They have very little self-cleaning ability compared to more open-block designs. If someone sold the MTR's to you based on their mud performance, you now know that they know nothing about mud driving. All magazine comparo's rate them as very average in the slippery stuff.

    They ARE, however, good on rocks - if aired down to a decent pressure.

  5. #5
    Join Date
    Jan 1970
    Location
    Nanny state UK...
    Posts
    3,253
    Total Downloaded
    0
    MTRs are actually pretty good in mud... They're just not as good as a dedicated mud tyre, like a Simex. However... The Simex is ****e on road where as the MTRs are very good on the black stuff.

    It's all about compromise.

    Anyway... Back to the subject in hand.

    The conditions you describe: Slightly damp grass on damp clay with an up-hill slope is probably one of the worst conditions to try & get through... It's like skating on ice!!! To dive it, you need momentum & plenty of right foot & just hope you can get enough traction.

    Ultimately, your best type of tyre would probably be a very narrow one with an aggressive stud like pattern so it can dig in.

    HTH

    M

  6. #6
    Join Date
    Jan 1970
    Location
    Avoca Beach
    Posts
    14,152
    Total Downloaded
    0
    In these circumstances, there are a couple of golden rules.
    1 try to avoid anywhere where the grass has been broken through to the clay.ie if someone else has been there avoid their wheel tracks
    2 Avoid wheelspin like the plague by using momentum and a very light throttle,ie try not to break the skin.
    3 if you start to wheelspin you aint going anywhere so immediately stop, back down , clean the treads and try a different line. Its only if there is only a wet crust that trying to dig down will work. If it is thoroughkly wet you do not have a chance.
    4 If climbing a hill avoid the ruts as that is where it is wettest and slipperiest.
    5This is where traction control is the ducks guts because it stops wheelspin and tread clogging.
    regards Philip a

  7. #7
    Join Date
    Jan 1970
    Location
    Bathurst NSW
    Posts
    14,445
    Total Downloaded
    0
    Know how you feel mate, i remember a trip through Jenolan Caves last year with OI, Henry, Myself and Scouse and we had similar fun. Matt
    <a href=https://the4wdzone.com.au/wp-content/uploads/logo.png target=_blank>https://the4wdzone.com.au/wp-content/uploads/logo.png</a>
    The 4wd Zone/Opposite Lock Bathurst
    263 Stewart Street, Bathurst, NSW
    http://www.the4wdzone.com.au/
    Discounts for AULRO members, just shoot me a PM before you purchase.

  8. #8
    LoadedDisco Guest
    Did you let your tyres down.
    If you let your tyres down this will help them to throw the mud out and gives a bigger tyre imprint on the ground for better traction.
    Let them down to 20 - 25 psi.

  9. #9
    Join Date
    Jan 1970
    Location
    Avoca Beach
    Posts
    14,152
    Total Downloaded
    0
    I dunno about letting tyres down.
    I was on a trip into the Hampton state Forest, near where Gascoigne was.
    It was so slippery that a 38a couldn't start because its traction control braked everything.
    A couple of the guys let their tyres down. The only difference I could see is that they bellied out on a downhill section just before the track became the 12 foot track. We had to push them downhill!!!
    I suppose that the increased flex of the tyre would tend to throw out more dirt, but also the ground pressure per sq inch would be lowered , thus making the tread sit on top rather than biting.
    On balance on that type of ground I saw no advantage, but it could be different somewhere else.
    By the way Gascoigne. Yes lock the rear diff before trying the hill.
    regards Philip A

  10. #10
    LoadedDisco Guest
    Letting the tyre pressure down I have found so far is the best thing for slippery hills, I originally had Coopers H/T tyres on which are tough road tyres and was on a slippery muddy hill. I only got up about 30 Meters and came to a spinning stand still.
    2 x attempts failed to get any further. Let the tyres down to 20psi and drove up that hill no worries and the rest of the day with out a problem. Still slipped around a little but so did the guys with Muddies. That was 55 profile tyre as well (255 x 55 x R18)
    I now run BFG Muddies on R16 rims. Traction is hugely improved and ride is smother with more side wall in the tyre.

Page 1 of 2 12 LastLast

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Search AULRO.com ONLY!
Search All the Web!