General Boards > Off Topic

Hand brake in 4wd

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whitey001:
But it's 4 wheel DRIVE, not 4 wheel PARK. If it's in Park, there won't be drive going to the wheels. Rev the car in Park and it doesn't go anywhere. Same as Neutral but it would roll away.  Only thing i would think is previous times when you have stayed in the vehicle is you have kept the transmission in Drive, thus keeping drive to the wheels/tyres.

Al.

mach:
Hell yes!
if it was in 4wd and in park all wheels would be connected to the gearbox which is locked in park

xsm:
OK, this is how I would look at it, let’s say you have 2H selected and you are parked on a slope with the vehicle in “park” and the handbrake off. You decide to stick your trolley jack under rear diff and jack the car up. It will roll away won’t it. If you do the same thing but have 4H or 4L selected the car won’t roll away - yes?

The tyres provide a degree of grip up to a point where enough “slipriness” will cause them to let go. If you were to slowly increase the degree of slipriness, wouldn’t 4 lots of grip hold the same car still for longer than 2 lots of grip?

I’m loving the new word of the day - slipriness:)

Cheers
Martin

mux339:
That's a very non-technical term Martin. What we really need to know is the coefficient of friction for:

* boat ramp - dry
* boat ramp - wet
* boat ramp - covered in lots of slimy stuff
A great analogy by the way. I am now able to wrap my head around this dilemma.

Thanks

mydmax2:
The boat ramp could be called a slipway I suppose., able to launch anything into the water just using gravity.

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