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Unread 09-04-2018, 09:16 PM   #1
Deerunner
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Default Modifying atrac

I've got a crazy question. I was reading that the 09 trail edition 4runner has a more aggresive form of atrac and has a dedicated button to turn it on in low range.
Does anyone know if we could hack this form of atrac into a different model 4runner?

Since we don't have a rear locker it would be very beneficial. Is this even possible?
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Unread 09-05-2018, 08:58 AM   #2
my034runner
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Quote:
Originally Posted by Deerunner View Post
I've got a crazy question. I was reading that the 09 trail edition 4runner has a more aggresive form of atrac and has a dedicated button to turn it on in low range.
Does anyone know if we could hack this form of atrac into a different model 4runner?

Since we don't have a rear locker it would be very beneficial. Is this even possible?

Not really sure, maybe a hacker can get in there and change it..........but I don't think there is a way.
I've never really had much of an issue with it, but I also have three lockers....rear, center and front (front just installed this year finally). I'm sure one of these Silicon Valley types here can chime in.
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Unread 09-05-2018, 09:22 AM   #3
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Anything is possible, but the cost may easily exceed the cost getting a locker. You will need to study the wiring diagrams of your 4Runner and the 09 Trail. You will likely have to swap some ECUs with the 09 Trail, as I am not aware of option to reprogram the traction ECU in the 4Runner.
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Unread 09-05-2018, 02:30 PM   #4
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I was hoping if someone knew if it's just a computer update that could be done. I wonder if it is a hardware upgrade like you say.
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Unread 09-06-2018, 12:08 PM   #5
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SO the Trail edition in 2009 has the same A-TRAC that the FJ Cruiser has. I am pretty sure it is the same thing you currently have only an option to turn it on/off. Like VSC cut really. Depending on what year you have. I know the early 2003-2005 had a mellower system than the latter years. All and all the ATRAC works pretty good with the center Diff locked. If that isn't cutting it then get a locker for the rear.
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Unread 09-06-2018, 07:16 PM   #6
Deerunner
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I have a 2009. It would be interesting if someone figured out how to activate it. From what I have read it is a more aggressive form of atrac
This is a quote from a post I read
ONLY the 2009 4runner Trail Edition had this form of A-TRAC...the rest of the 4th gen 4runner had the 'normal' ATRAC.) It is a lot more aggressive at clamping down the slipping tire(s). It is ONLY available when you're in 4-LO.


I would love a locker at some point. Definitely on the wish list.

Last edited by Deerunner; 09-06-2018 at 07:26 PM.
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