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General Challenger Discussion This section contains general discussion about the Dodge Challenger. If it does not fit into a more specific area, it probably belongs in here. (Dodge Challenger General Discussion)

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Old 11-19-2012, 09:05 AM
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Posi trac?

Hi guys, I have a 2013 base R/T and it has an auto with the 3.06 ratio, I didnt see anything about a positrac on the window sticker/build sheet, but it does dual tire burnouts with traction control off......so do I have a "Anti-spin Differential Rear Axle"....which I thought was only an option or part of the supertrac pac?
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Old 11-19-2012, 10:28 AM
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The brakes engage to trick the open diff into thinking it is slipping unless you have the limited slip rear...$100 option and well worth it.
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Old 11-19-2012, 10:28 AM
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Not part of super track pack
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Old 11-19-2012, 10:55 AM
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Originally Posted by Go Goody View Post
The brakes engage to trick the open diff into thinking it is slipping unless you have the limited slip rear...$100 option and well worth it.
So with traction control off why am i doing dual tire burnouts? and I wish i could add it for $100....haha

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Old 11-19-2012, 10:59 AM
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like this
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Old 11-19-2012, 11:00 AM
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If you have a two tire fire going, you have a limited slip differential. I believe Dodge calls theirs the "Sure Grip." Posi, is a Chevy term IIRC.
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Old 11-19-2012, 11:24 AM
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Originally Posted by Bills RT View Post
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Yep like that! Is it a different positrac than the one they list as an option (anti spin differential)....since mine didnt say anti spin?
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Old 11-19-2012, 04:10 PM
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The reason you can put 2 stripes down with an open diff even with TC disabled is because irs pretty well neutralizes the problem when it comes to standing burn-out kind of launches. A closed-diff won't make much difference in such a scenario...the car is sitting level even under torque, so there is no reason for 1 tire to break loose by itself.

You really have to be cornering the car on-power for this to become an issue with the open diff, and even then, you get a good amount of leeway with power going down in both tires before it peg-legs. You really got to turn hard and abruptly to lift the inside tire far enough to blow-out traction. It's probably not even all that natural a turn, as far as skillful navigation through an apex...so not all that much to worry about, imo.

My theory is that the LSD is still a highly desired item because people are still thinking in the context of sra cars (where you truly do need that type of control). Now that modern muscle sits on an irs, it's a totally different ballgame. People may still want the LSD, but it's not nearly the dire necessity as it used to be, as far as actual utility.

From my personal experience, there's plenty of instances where you would think the inside is going to break loose, but it doesn't. If you are doing it "right", both tires are putting down good thrust, and it is even quite likely the outside tire is at the threshold of breaking lose between thrust and lateral traction. So you'll be getting tail-out just like if you were on an LSD...not really missing out on being able to put more power into a turn, because adding any more is only going to trigger more oversteer.
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Old 11-19-2012, 04:29 PM
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I didn't think you could cut the traction control completely off on an R/T??????
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Old 11-19-2012, 04:35 PM
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On my 2013 M6 R/T I hold the button down for bout 5secs and beast mode turns on!
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