Certainly answers my questions at to a Ranger and a WnP making it over the GRR. Any particular dust entry problems and what speeds were you doing it at?
thanks everyone
Yep heaps haha. Dust was the only issue I had. Basically the main rear door and the wheel arches were the culprits. Unfortunately I didnt get the POS pressure system finished before I left. suggest running a bit of grease over the seals at the back door (It moves soo much) and sealing up the arches as best you can. also the floor in the back of the WNP was not sealed up at all around the walls.
Ranger wildtrak roller shutter was letting dust in after a bit as screws were loosening and getting lost aver the corrugations. But it was loaded up more than its initially designed to.
It was like the old finger in the dyke trick. plug one up another showed..... id prefer that over what my old man suffered on the trip but as he pretty much had to rebuild the whole thing when he got home and his van was considered offroad spec.
Speed 90km/h average as it was the most economical (rolling in some bits that were that corrugated) could do 110km easy but sucked the juice. was good for overtaking but. some sections youd drop to 50km/h
fuel consumption around 20-23l/100 (30l/100 on headwind/ overtaking)
tyres were at 35psi in car and 30 in van.
Engine temps etc were all normal.
only thing id change is the need for some airbags. Other then that I could not fault it..
Oh and I broke a tailight from articulating the van and car too much on an offroad track.....We didn't stay on the designated track all the time

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For all that want to do it....it really is just a dirt track. get your pressures right and don't be silly and it will go fine. oh BTW the van is standard solid axle leaf sprung too. nothing special here.