Arb locker activated by factory controls?

Looking at getting a front range off road diamond rear axel housing with an arb locker in a larger diff. Currently have a trd pro with the factory electric locker back there and was wondering if anyone has any experience hooking up the arb locker to the stock electric trigger so it would lock when engaged by the factory system.

Not sure if I really need that to work for me, but more concerned about what happens to all of the automatic “getting your ass unstuck modes” on the dial up top on the roof.

Waiting on OV tune to send me my turbos right now and hoping I can get a real dyno run on the rear tires with this for you guys.

 

I think it would be better to have it setup manually. The factory locker only engages in low range, an ARB would be an upgrade in that you can turn it on anytime.

 

I would still have a dedicated switch. Just curious if anyone has been able to get it to activate with the crawl options and factory system automatically as well?

 

You really want a separate switch. There are times when youll want the option to engage the rear without the front.

 

I don't think crawl control or any other systems automatically turns on the locker, it's still manual if I recall correctly.

 

For those times doing 'the speed limit' on the highway and you need to lockup

 

It shouldn't be an issue, just have to find the signal wire and tap into it to trigger the ARB air solenoid. Granted you'll need your compressor connected to it too. Depending on your air setup(tank) it could take a few minutes to have enough air pressure for the ARB locker to engage.

 

The stock switch isn't latching so you will need to somehow latch the signal to hold the air solenoid in the on state. And make sure whatever is carrying the current to the ARB solenoid can handle it. The solenoid doesn't require much, I think about 0.5A from memory, but the stock switch is basically logic level.

 

I would still have a dedicated switch to run the locker in 2 wheel drive. Just wanted to know if it was possible to still have it auto lock in crawl control in low. I understand I can still hit the dedicated locker switch when I put it in crawl control and it will still be the same. I just would like it if it was still automatically engaged when the system engages it.

Mostly curious if the arb needs a constant signal switch completely open or closed circuit and if the stock locker engagement works the same.
could I tap the signal wire to engage it automatically or should I just leave the systems separate?
I’ll probably leave them separate, but thought it would be cool if it still worked with the stock system as well.

 

Exactly my question. Just saw this.

 

Good info for sure.

 

If you're gonna have manual switch(s) anyways and the crawl modes don't(?) utilize the locker might as well leave them seperate. Hopefully someone can chime in on this point.

 

I think when you put it into 4lo it automatically engages the electric locker. I know the system also uses the brakes to help control wheel spin in crawl modes. Will the arb locker affect that or cause any problems in that regard?

 

NO. (In fact for the OR/PRO trims in automatic, there is NO traction control active by default in 4lo. This is a difference between the SR/SR5/Sport/Limited trims and the OR/Pro trim. And a functional difference between the manual and automatics in the OR/Pro trim due to Atrac vs MTS.

YES.

MOST LIKELY NO.

 

No it doesn't. You press the button to lock or unlock the diff. It's just that the oem setup only allows you to lock the rear diff when in 4LO.

 

No

 

So is the mts button basically the diff lock button?

 

No that's the multi terrain select which is your adjustable simulated LSD using individual wheel braking (MTS is a version of A-TRAC). The diff lock button is the diff lock.

 

The locker ONLY answers to the diff lock button. The diff lock button is only active in 4low. The MTS is a totally separate traction control system. The different modes change how the computer applies the traction control (how much wheel slip is allowed primarily).

 

I was just trying to emphasize that in 4lo, your OR/Pro defaults to NO traction control aids AT ALL... (which is different behavior than SR/SR5/Sport/Limited trims)

It will have by default in 4lo:
Open Front Diff,
Open Rear Diff,
(NO brake simulated limited slip diff)
The locked transfer case is the only 'traction aid' which defaults ON in 4lo (for OR/Pro)


To get traction aids in 4lo (for OR/Pro) you have to engage the diff locker every time you change into 4lo, or engage MTS/Crawl Control every time you change to 4lo (as all these switches are non-latching). The manual transmissions get ATRAC button which is latching, so if you have ATRAC ON the last time you drive, it will still be ON the next time you switch to 4lo.