Just got back from Scuderia Jeep @ Chatswood.
They did the calibration to the max tyre size they could.
Still out but not as much now, only a few km/hr or it could be my GPS is crap.
Might chuck it on my mates dyno when I have time.

Not going back to Lincorp for anything ever again.

I'm not surprised.

I heard it was impossible for about a year, until I found a bloke that said "YEAH, takes five minutes".

Imagine what that place would do when repairing a vehicle

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SOME SAY

I'm Toight... Toight lik a Toiger.

And

When I go to the Toilet, Chuck Norris is there to tear the squares off for me.

"Pass me another one Chuck, and keep em coming!! On sencond thoughts..Go get the hose"

Not wrong when people call them "stealerships"

Thanks to cmohr for giving us insight in to this calibration thing.

You probably won't notice much of a difference driving (in the CRD) but, you may notice it holds gears a little better around the "change" time, as engine revs match wheel speed. But with all that "Boost" stuff from the turbo, we'll probably never know.

_________________
SOME SAY

I'm Toight... Toight lik a Toiger.

And

When I go to the Toilet, Chuck Norris is there to tear the squares off for me.

"Pass me another one Chuck, and keep em coming!! On sencond thoughts..Go get the hose"

I believe the ABS wheel sensors do measure the actual rotational speed of each wheel. My KJ not only has ABS but also ESC (Electronic Stability Control) which uses a combination of inputs (wheel speed, lateral acceleration, yaw and steering wheel angle) to determine whether the car is actually going where I want it to, and apply the brake on one (or more) wheel(s) if it detects understeer, oversteer, or sideways slip. Clever stuff!

It works, too, as I found out on some dirt roads when towing the trailer. Statistics say that ESC reduces singe vehicle accidents for SUV's by about 44% (ordinary sedans by 30%), largely due (for SUV's) to the reduction in rollover accidents.

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November 2006 2.8 CRD manual, CRDSTU front springs, King HD rears, Polyairs, LT245/70R16 Pirelli Scorpion ATRs, DP chip, Airflow snorkel
TJM alloy front bar, Ox 9500lb winch, Hella Compact 4000 spots, Complete set Mopar skid plates, Mopar cargo barrier
GME TX3440 UHF, Codan NGT HF

I don't doubt that the ABS sensors detect speed, thats there job, when I said "speed" I of course meant the speed actually displayed on your spedometer, what I doubted, and as Ed found that out, it was just an excuse to why they could not do what he asked. The primary "speed" sensor is in the diff (thats the information given to me by several sources), and that info is the one that all other sensor information is placed against, (ie in gearboxs, ABSs sensors and engine revs and the like), thats how it works as there has to be something to compare to for ABS and the like (ESP) to work. The ABS sensors look for mismatches in speed in each wheel to determine as to whether a wheel has locked up under braking, and if it detects this occurance it reacts, same as traction control, if it detects a wheel spinning more than others under power it transfers power away from that wheel to the others. ESP is a cross between ABS and Traction Control as it does both at the same time, it's very intuitive, as you have stated it takes not only speed into account, it looks at diangle, steering position, gear, and even 4wd - 2wd.

_________________
SOME SAY

I'm Toight... Toight lik a Toiger.

And

When I go to the Toilet, Chuck Norris is there to tear the squares off for me.

"Pass me another one Chuck, and keep em coming!! On sencond thoughts..Go get the hose"

Thought I'd add this to the discussion since it's related.

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2003 2.8 CRD Cactus Green Renegade
ARB front bar, rear hitch receiver, IPF spotties, HID headlight, 2.25" coil lift, Rancho shocks, daystar rear bumpstop extender, 245/75/16 Maxxis Bighorns.