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re: traction control

post #1 of 9
Thread Starter 
i have a 2wd lexus with traction control and i can tell you the lexus engineers totally wasted their money on the design and parts! I can't even get out of a VERY short incline up my driveway sometimes. All it does is cause my car to lock up and i can't use some handling manuevers that i might otherwise, can't wait until this lease runs out.
post #2 of 9
yah man traction control doesnt do much good when there is no grip in the first place. Its good if you give it a bit too much throttle on a corner or something like that if u got a limited slip diff but not good for inclines. A snow tire would help you with the tire stick problem or a permanent 4WD.
post #3 of 9
Buy a Subaru. I've got three and have NEVER been stuck....

post #4 of 9
I have a friend who has a BMW M3 which has traction control, and he can't get out of his driveway when it's icy.
We talked about it and realised that it's not the power, but it's also to do with weight and driven wheels. (if you've a front engined car)
Rear wheel drive cars have better acceleration than front wheel drive (I'll let PhysicsMan explain momentum and all that stuff), but at low speeds and when traction is crucial, a front wheel drive car will have better control. The traction control on my car still allows me to get moving even on the icy stuff. Yes, it does cut in, but not so significantly to remove my ability to move.

Unfortunately, switching off traction control on a rear wheel drive car won't help the situation much.
post #5 of 9
Every vehicle can benifit from weight.Even a light,short wheelbase 4x4 will bog down in 6"-8" of snow if it is not properly weighted down.
I don't know if your Lexus is front or rear wheel drive,if it is rear wheel load it down with sand bags just watch you don't add so much you effect the handling in the front.
I had a friend show up to the mountain with the back of his front wheel drive minivan loaded down with sand bags,WHAT A IDIOT!
post #6 of 9
Traction Control on high performance vehicles is not for added grip in snow. It is for aggressive driving in wet and dry conditions. Get yourself some snow tires and learn to drive.

I hope you don't think cruise control will allow you to sleep and make it to your destination too.

[ January 01, 2004, 09:49 AM: Message edited by: BetaRacer ]
post #7 of 9
Dont forget the person behind the wheel, oftern the problem lies there and not in the vehicle!! Ive seen USsoldiers here in middle Norway get stuck with 4wd Humvees where I cruise easily with my 2wd BMW 5-series! They could not simply drive on snow/ice/water on ice! Here we dont do much else since salting is a rare phenomena!
post #8 of 9
WTFH, in times of old, on rear traction cars we used to load the trunk/boot (sorry, never remember which is Americn and which English) with something heavy (like a 100 kg cement bag)
to improve adherence...
My old jeep was a rear 2WD...part time 4wd...never had problems
post #9 of 9
aah...traction control [img]smile.gif[/img]
there are 2 different ways I know of for how traction control works. Both work via detecting slip in the drive wheels.

1. braking
on cars with TRACS such as the volvo 850, the traction control works via ABS brake system. If one of the wheels encounters slipping, the abs system will start pumping on that particular wheel until traction is gained. I do not know if this is only for the drive axles or not.

2. power output
on cars with TRACS as a toyota supra, the traction control works based on the throttle body. there is another throttle body that is in front of the main throttle body. this throttle body is normally 100% open. if the ECU detects slipping, the throttle body will close to lower power output until the wheels gain traction.

in your case, since you have a toyota (lexus), you might be able to take off the glovebox where you should find 3 different aluminum boxes or what not. one is the ECU, one is the ABS unit, and the other should be the TRACS unit. Disconnect the TRACS unit and kiss goodbye to TRACS [img]smile.gif[/img] the TRACS light might come on tho.

in addition to the 2, i believe volvo and VW in addition to other manufacturers, there is another method of TRACS which I personally like very much. The VW 4-motion and volvo AWD are not true 4WD vehicles, but front wheel drive biased (90 power front, 10% power rear). If slip is detected in the front wheels, the TRACS via a viscous clutch or haldex transfer system, or some other method, will transfer up to 80% of the power to the rear wheels (10% front 90% rear). In icy situations, this is the only method, imho, aside from true 4wd that TRACS will help. Reason being, if even one of the wheels have some grip, the car will move. THe negative side of this? it's mechanical so it will only work as fast as the power transfer...i encountered this situation today [img]smile.gif[/img] .

the only vehicle that has a superior TRACS system to everything else out there is a nissan skyline...unortunately, not available here. the atessa ets system electronically controls the 4wd. it's a true 4wd, but the system will instantly drop power to the wheels that are slipping unlike viscous clutch which takes a moment to work [img]smile.gif[/img]

hope this helps

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