D3, DSC and mud

[WhiteD3]

Hiya,

Went out on Sunday to MT Mee with Twitchy, Mick et al and had a great day......but I was disappointed I had to have 3 goes at getting up this slope (Picture courtesy of Mick).

http://img66.imageshack.us/img66/4041/1004132ld6.jpg

What happened was that on the first two attempts in L2, flat to the boards, I got halfway up, the revs just dropped away and we stopped. Third time we took a bigger run up and all was well.

On reflection I think the issue was I'd forgotten to turn off the DSC when I changed the TR from gravel to mud-ruts. And I assume changing TR selections turns the DSC back on if it was previously off like it does with the hill decent?

Here's the vid.

http://www.youtube.com/watch?v=9Rept0V5_OI

Looking forward to being educated.

Cheers,

Mark

[Phoenix]

What sort of tyres do you have?? there is only so much the oem tyres can do in slippery conditions.

[WhiteD3]

What sort of tyres do you have?? there is only so much the oem tyres can do in slippery conditions.

The standard Wrangler all weather M+S 255/60R18.

While I know they're inadequate for the job I still think (?) the issue was the revs dropping off as the DSC kicked in to stop the wheels from spinning.

[gghaggis]

Yes, the DSC resets itself every time you change the terrain response setting or restart the vehicle. Bit of a bugger - you just have to remember to switch it off!

From the video though, it looks like you'd need a more aggressive tyre anyway.


Cheers,

Gordon

[WhiteD3]

From the video though, it looks like you'd need a more aggressive tyre anyway.

In the budget for next year, pending SWMBO's authorisation:(. Maybe I'll stake a couple and have no choice:cool:

[stevo68]

Hey Mark,

Good to see you out and about. Hmm had a look at vid a cuppla times and bit hard to know without seeing outside visuals, but yep tyres could be one. What pressure did you have them down too? Reason I ask is that I did some pretty gnarly stuff with the old HP's and generally you should have got up that, even with them on. For that I would have been 1st low, Mud/ Ruts, never really swicthed off DSC for Mud only sand, so must try it sometime :D and some boot. You seemed to pull up fairly quickly which could quite simply also be a confidence thing.....and I should know about that :). As time goes on and you attempt different terrains you will learn more about what the car can and cant do plus also grow in confidence as it happens. Its all a learning experience. Mind you I could be wrong on all the above, but having spent 16mths on HPs before getting the Grabbers I have a pretty good idea of what they can and cant do,

Regards

Stevo

[WhiteD3]

Thanks Steve.

I'm 99% sure that I just gunned it in L2 and kept the foot down. In the vid you would have seen a couple of people standing halfway down the slope where I came to a halt. They said later that it looked to them as if I took my foot off because we just stopped.

By stopped I don't mean slid to a halt with the wheels spinning (defeated by the slope and lack of grip), but stopped as in wheels stopped.

Hence me wanting to better understand the DSC. My novice interpretation of DSC is that it'll brake a slipping wheel and (?) override the revs to regain control of the car so I would think that DSC and mud don't mix?

At the end of the day we got up, just needed an extra 10m run up (which the kids thought was a hoot!).

Cheers,

Mark

[stevo68]

Someone more technical on the aspects of DSC might know, but as far as I am aware it shouldnt pull you up short like that. Does a light or anything come on when the e-diff kicks in and did you feel it kick in? Reason I ask is that I have had a situation where I would say due to DSC it slowed the spin of the wheels, then the ETC and E-diff kicked in and pulled me up,

Regards

Stevo

[PCH]

Even when you turn DSC off it is never really off. It still kicks in and limits power and is most frustrating.

Slippery hills will defeat the D3 unless you take a run up to keep the momentum up before the wheels start to slip and the DSC begins to interfere.

An aggressive tyre would help but dosn't stop DSC wanting to take over,

Chris

[WhiteD3]

Even when you turn DSC off it is never really off. It still kicks in and limits power and is most frustrating.

Slippery hills will defeat the D3 unless you take a run up to keep the momentum up before the wheels start to slip and the DSC begins to interfere.

An aggressive tyre would help but dosn't stop DSC wanting to take over,

Chris

I did notice on the day that at odd times the DSC light would flick on momentarily (yellow triangle within a circle?).

I'll pay more attention next time. ie the GCLRO trip at the end of Oct.

[stevo68]

I did notice on the day that at odd times the DSC light would flick on momentarily (yellow triangle within a circle?).
From memory that is either the ETC activating or ABS, bugger might have to look up in the manual,

Regards

Stevo

[Bushwanderer]

Please excuse my ignorance, but what is DSC?

[stevo68]

Please excuse my ignorance, but what is DSC? No worries mate, Dynamic Stability Control,

Regards

Stevo

[Bushwanderer]

No worries mate, Dynamic Stability Control,

Regards

Stevo

Sooo! Does that mean a form of traction control?:confused:

[WhiteD3]

Yes, but my understanding is its more about road handling/cornering and I assume it is used by the TR from rock/lose surface climbing.

The manual says to turn it off for mud/sand.

[Jamo]

The DSC operates in different ways, depending upon the TR mode you're in.

In sand it mostly uses the brakes via the ABS system. (You can generally tell you've left it on in soft sand when, right before you get bogged, you hear a growling sound).

In mud&ruts it changes the throttle response as braking may not have the right effect.

[jik22]

(You can generally tell you've left it on in soft sand when, right before you get bogged, you hear a growling sound).

Fantastic! One of those things you hopefully only ever do once, and one I'll try and avoid now you've warned me. :Rolling: