D2 HDC

Is HDC necessary on any of the LR's with low Range. I am sure that
some D2's have it and I think the D3 may also have it.
Unless they have changed it, HDC operated at 8km/h and I know that low
1st would not let you anywhere near that sort of speed. So what's the
point or am I missing something? Can any flash model LR owners
elighten me as to the usefulness of HDC?

I must say that my auto 300Tdi disco auto does go a little faster than
my old ser111 in low first but not alarmingly so.

Regards
Stephen

"fanie" <[email protected]> wrote in message
news:[email protected]...
: Is HDC necessary on any of the LR's with low Range. I am sure that
: some D2's have it and I think the D3 may also have it.
: Unless they have changed it, HDC operated at 8km/h and I know that low
: 1st would not let you anywhere near that sort of speed. So what's the
: point or am I missing something? Can any flash model LR owners
: elighten me as to the usefulness of HDC?
:
: I must say that my auto 300Tdi disco auto does go a little faster than
: my old ser111 in low first but not alarmingly so.
:
: Regards
: Stephen

IIRC HDC was a freelander technology item, that the boys in suits thought
might be funky to showoff across the rest of the range. A hippo not having
low range needed the trickery for descents

HTH

Si

On 2006-07-12, fanie <[email protected]> wrote:

> HDC operated at 8km/h and I know that low 1st would not let you
> anywhere near that sort of speed. So what's the point or am I
> missing something?

On a properly steep slope, ticking along in 1st gear low can cause the
wheels to skid as the engine braking effect forces the wheels to break
grip. You then have to dip the clutch to speed up and stop the truck
swinging round. I believe that HDC would cater for that, although I'm
not convinced I'd prefer it to doing it myself.

--
Blast off and strike the evil Bydo empire!

>On a properly steep slope, ticking along in 1st gear low can cause the
>wheels to skid as the engine braking effect forces the wheels to break
>grip. You then have to dip the clutch to speed up and stop the truck
>swinging round. I believe that HDC would cater for that, although I'm
>not convinced I'd prefer it to doing it myself.

I suppose that you chaps are more used to mud and slime than we are,
although we do sometimes get some good rainfall. I must say that I
have never had the back wheels overtake me but then I am usually at
home if the weather is bleak enough to provoke wheel sliding etc.

Does make me think what to do in an auto if the situation you describe
occurs, as you would usually not be driving with one hand on the
shifter deady to engage drive. On the rare occasion when the wheels
have started sliding on my old serIII I used to just accelerate a
touch.

As for HDC, I am not convinced it would handle this sitation too well.
My firends D2 TD5 ES went galloping up a very snowy and icy sani pass
with the taction control working a treat, but coming down he nearly
soiled his rods and immediately went off to purchase some chains. Not
sure if his wagon has HDC though.

regards
Stephen

fanie wrote:
> >On a properly steep slope, ticking along in 1st gear low can cause the
> >wheels to skid as the engine braking effect forces the wheels to break
> >grip. You then have to dip the clutch to speed up and stop the truck
> >swinging round. I believe that HDC would cater for that, although I'm
> >not convinced I'd prefer it to doing it myself.
>
> I suppose that you chaps are more used to mud and slime than we are,
> although we do sometimes get some good rainfall. I must say that I
> have never had the back wheels overtake me but then I am usually at
> home if the weather is bleak enough to provoke wheel sliding etc.
>
> Does make me think what to do in an auto if the situation you describe
> occurs, as you would usually not be driving with one hand on the
> shifter deady to engage drive. On the rare occasion when the wheels
> have started sliding on my old serIII I used to just accelerate a
> touch.
>
> As for HDC, I am not convinced it would handle this sitation too well.
> My firends D2 TD5 ES went galloping up a very snowy and icy sani pass
> with the taction control working a treat, but coming down he nearly
> soiled his rods and immediately went off to purchase some chains. Not
> sure if his wagon has HDC though.
>
> regards
> Stephen

All D2s have HDC. I have never felt the need to use it (I've had two,
and auto and a manual), so can't comment, but even an autobox in 1st
low will trickle pretty well. If it starts to toboggan, just give it a
bit of gas to bring it in line and get the wheels gripping again.

DaveP

On or around Wed, 12 Jul 2006 12:54:39 +0200, fanie
<[email protected]> enlightened us thusly:

>Is HDC necessary on any of the LR's with low Range. I am sure that
>some D2's have it and I think the D3 may also have it.
>Unless they have changed it, HDC operated at 8km/h and I know that low
>1st would not let you anywhere near that sort of speed. So what's the
>point or am I missing something? Can any flash model LR owners
>elighten me as to the usefulness of HDC?
>
>I must say that my auto 300Tdi disco auto does go a little faster than
>my old ser111 in low first but not alarmingly so.

HDC is basically special low-speed ABS on all 4 wheels. This, as with ABS
on the road, will give you almost-maximum braking and maximum control for
the surface you're on. If it's too steep or too slippery it'll take off at
a rate of knots.

On loose dry stuff, maximum braking is achieved by locking the wheels and
pushing a wedge of material in front of them (dry gravel, fresh dry snow for
example) but this only applies to stopping, not to steering as well.

I imagine that HDC will get you more safely down marginal slopes where the
traditional low-1-and-feet-off starts to go wrong. I doubt it'd have
stopped me going half-off the edge of the road I went off in the snow, had I
had it - simple case of not enough grip, although depending on what it does
when all 4 wheels lose grip it might have left me with enough steering to
point down the road. whether I'd have got around the bend at the bottom, I
don't know
--
Austin Shackles. www.ddol-las.net my opinions are just that
Appearances: You don't really need make-up. Celebrate your authentic
face by frightening people in the street.
from the Little Book of Complete B***ocks by Alistair Beaton.