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Old 12-22-2009, 10:26 AM   #1 (permalink)
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Default When to deactivate traction control?

My 09 Forester has a button to deactivate the traction control in so called "certain situations". What situations would I maybe want to deactivate the traction control?
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Old 12-22-2009, 10:43 AM   #2 (permalink)
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My 09 Forester has a button to deactivate the traction control in so called "certain situations". What situations would I maybe want to deactivate the traction control?
If you want to spin your tires and cause a 'smoky burnout' when street racing you should disable it. Also someone can correct me if wrong here but I think at speeds above 30 mph or so it does not engage anyway. Also I think if you get stuck in mud or snow with the system on you will have a hard time rocking the car back and forth to get out.
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Old 12-22-2009, 10:59 AM   #3 (permalink)
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If you get stuck in snow/mud, disengage the traction control.
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Old 12-22-2009, 11:35 AM   #4 (permalink)
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When you need to rock the car to get yourself unstuck.
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Old 12-22-2009, 12:40 PM   #5 (permalink)
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Check pp. 7-27 thru 7-29 of your OM.
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Old 12-22-2009, 01:01 PM   #6 (permalink)
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Ok that doesn't make much sense. If the whole idea of the traction control is that it gives traction to the tires that need it most shouldn't it help most when you are stuck in deep snow or mud? I am just curious to really understand what is going on. Thanks for the reference to the owners manual. I should have sone that first I guess.
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Old 12-22-2009, 01:08 PM   #7 (permalink)
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If you need to dig with the tires in order to get traction, shut off traction control. this is most often the case when you are severely stuck. If you are making any headway, you probably want to leave it on.

When you are trying to blast through something like a snow drift or a steep snowy hill, you may want to turn off the traction control so that you can keep momentum.

Sometimes when Making a U-turn on wet, slippery pavement you will find the outside tire spins and the traction control retards the throttle making it hard to accelerate fast. This can be a problem with rapidly approaching oncoming traffic.
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Old 12-22-2009, 01:11 PM   #8 (permalink)
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Ok yeah those situations make a lot of sense. Thanks
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Old 12-23-2009, 07:48 AM   #9 (permalink)
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My business partner had a rental Jeep Liberty (4wd of course) and got "stuck" in a bit of a dip on a logging road as the traction control retarded the throttle so much due to perceived wheel slip that he could not get out of the dip and needed a push from a passing pickup. And with no owners manual on board, he did not know how to turn off the TC.

For those of us who drive a lot on gravel or snow packed bush roads, we often will disable the TC so as to prevent such an incident as he had. I have found over the last few years that the TC as implemented by Chrysler to way too intrusive but Subaru's implementation is just about right. So far, I have never had to turn it off. So far.......
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Old 12-23-2009, 11:51 AM   #10 (permalink)
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My business partner had a rental Jeep Liberty (4wd of course) and got "stuck" in a bit of a dip on a logging road as the traction control retarded the throttle so much due to perceived wheel slip that he could not get out of the dip and needed a push from a passing pickup. And with no owners manual on board, he did not know how to turn off the TC.

For those of us who drive a lot on gravel or snow packed bush roads, we often will disable the TC so as to prevent such an incident as he had. I have found over the last few years that the TC as implemented by Chrysler to way too intrusive but Subaru's implementation is just about right. So far, I have never had to turn it off. So far.......
I have been pleased that it is not too aggressive. That jeep story is pathetic. I don't turn it off on gravel roads because I have had it work to my advantage to keep me on the road in turns where I start slipping sideways.
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Old 12-23-2009, 01:16 PM   #11 (permalink)
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Quote:
Originally Posted by Trainman View Post
My business partner had a rental Jeep Liberty (4wd of course) and got "stuck" in a bit of a dip on a logging road as the traction control retarded the throttle so much due to perceived wheel slip that he could not get out of the dip and needed a push from a passing pickup. And with no owners manual on board, he did not know how to turn off the TC.

For those of us who drive a lot on gravel or snow packed bush roads, we often will disable the TC so as to prevent such an incident as he had. I have found over the last few years that the TC as implemented by Chrysler to way too intrusive but Subaru's implementation is just about right. So far, I have never had to turn it off. So far.......
Heh, you should see the TC on the prius. Cuts power whenever slip is detected and it can't be turned off. Lots of fun with fwd in the snow....take it 2 inches at a time!

TC should be turned off if you need to keep momentum up (usually in deep mud, sand etc), where you're already spinning tires, or if you need to get yourself unstuck and its just not happening with TC on.
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Old 12-24-2009, 04:05 PM   #12 (permalink)
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Heh, you should see the TC on the prius. Cuts power whenever slip is detected and it can't be turned off. Lots of fun with fwd in the snow....take it 2 inches at a time!

TC should be turned off if you need to keep momentum up (usually in deep mud, sand etc), where you're already spinning tires, or if you need to get yourself unstuck and its just not happening with TC on.
You are right on this one. My pal has a Prius and hates it in the snow, he said he could not even make it through an intersection that had 2" of snow on the roadway. He said it just transferred power back and forth to the left and right wheels after some hesitation, he finally did manage to inch his way through. Talk about dangerous.
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Old 12-24-2009, 04:22 PM   #13 (permalink)
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Had to push a BMW 5 series out of a parking lot a couple of years ago at New Years because the traction control wouldn't allow the wheels to spin. FINALLY I figured out that it was the CAR, not the driver (who didn't speak much English...) that was modulating the throttle, so I reached in, turned off the trac control and all of a sudden all I needed to do was lean against the car to keep it moving. ALL this in about 6 - 8 inches of snow...

He just kept driving once he got out so I'm not sure if his trac control EVER got turned on again...
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Old 12-29-2009, 10:45 AM   #14 (permalink)
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Traction control in the 5 Series defaults to on when you restart the car next, so no worries ;-) Hopefully the driver picked up what you did for next time :-)
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Old 12-29-2009, 03:34 PM   #15 (permalink)
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In the Blizzard we just had I got my wifes Tribeca stuck in deep snow with an inch of ice underneath. The only way I could get moving again (after some shoveling) with a push from a few guys was to turn off the VDC. This is the true VDC too with the VTD and everything :) I could feel it trying at a few points but eventually it just would not spin a wheel or it intermittently spun various wheels and throttled back on the motor. I thought the motor stalled at a few points but I was down to glare ice w/ the All Season tires. The reason I got stuck in the first place was I had to stop due to a huge drift. When I backed up I had to turn in such a way as to not follow my original tracks and hit another drift. The TC kept digging down to the ice. The conditions were such that in all honestly I should have had tire cables but mine only fit up to 17" wheels and the B9 has 18's First time it ever let me down but it was my own fault.
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