What went wrong....

I've never had an issue with traction control in my 2010 D90 in sand and doubt that it is the issue. It is all most certainly a gearing and momentum issue. I have find times in very soft sand that if I backed off the accelerator I actually surged forward as the wheels stop spinning. Try starting in third or fourth low and tackle the dunes in fifth or sixth low. If still a problem then try high range. What you are trying to achieve is good momentum with low engine revs while still having full directional control of your vehicle. If you can feel you are going down don't plant your foot, that will dig you deeper. I normally run at 18 psi in sand on standard tyres.

Cheers
KarlB
:)

This thread is the very reason I maintain that all the acronym add ins should only ever be relied upon as a warning that you are approaching the limits of your vehicles native ability......

If you got there by raping your mechanicals via the electronics,,, what happens when the electronics go west or you burn out the brake pads....

Ive been on trips where badly driven and setup electronic vehicles have gotten to the end of some sections with smoke coming off the brakes, not steam, smoke.

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Originally Posted by Loubrey

Decent run up, nice low pressures, but the moment the wheels "kick" on the way up the dune the TC engages to stop the spin, systematically ending up doing it to all 4 wheels and the car stalling. This is not an "urban legend" regarding Pumas, but a unique occurence on steep dunes. As I also own one, I'm allowed to mention it! ;)

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Im sorry, allegedly this can NOT happen, the puma is supposed to have stall control...

Anti stall only exist in low 1.

Nugget had a similar problem. Traction control brakes the vehicle looking for traction which hinders the cars momentum on steep slippery slopes like sand or clay. It has to be steep however, and no aids may still achieve the same result.

What you have to do is go back when no one else is there& have a go in high range,try a few different things ,i also doubt TC is the issue.

My son has never had an issue with his in real soft sand,and he is often with his mates that have jap things with diff locks.They actually cannot believe how good the deefer is stock.

I did a lot of sand driving in the D2,TC was never an issue.In fact against a mate with a LC TD trayback,it would beat it easily up any dune.

Speed & momentum is the go

Good luck

I remember reading threads about the D2's TC making it hard going in the sand, the fix was to remove the fuse.

What's changed

If you crawl up at walking speed and have traction on some wheels TC is your friend. If you are going for a bit of the old slipper (right foot) TC will be your enemy unless you have enough grip on the majority of wheels to retain traction and forward momentum.

Remember that TC is the intermittent application of the brakes, on sand you end up with all wheels with an intermittent application (i.e., reduced duty cycle) of the brakes. This kills your momentum.

We had a similar problem with our D2, before fitting the CDL lever, the front brakes would constantly, rides and hence burn and kill momentum, with the CDL locked there is little if no problem at all, maybe a front locker is needed if you want to go real extreme (or rear aswell).

Cheers
Will

Can somebody explain how ETC kills momentum in a sand driving situation?

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Originally Posted by newhue

Anti stall only exist in low 1.

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Wrong... That is the 'Idle Jack'.

M

Quote:

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Originally Posted by KarlB

Can somebody explain how ETC kills momentum in a sand driving situation?

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There is a complete thread on this http://www.aulro.com/afvb/90-110-130...n-control.html

Issue raised a few times but not resolved - as TC is working on the wheel that has no traction, I also would like to know how momentum is destroyed.

Garry