Front LSD and rear locking differential?

A dig would be perfect. It's got the rear hand brake so making tight turn around with the dig would be so easy. I can't believe toyota isn't listening to us about dig! The Yaris can do it!

 

@Gincoma
This chart indicates that you are correct.
I'm looking to see if I can find anything about the A-trac indicator.

 

https://www.tacomaworld.com/threads/2wd-lo-mod.195424/#post-4265319

 

Without hacking up wiring on a 17 k mile truck.

 

It looks like it works up to three mph, at least according to this thread:

https://www.tacomaworld.com/threads...easy-to-understand-i-hope.70551/#post-1333613

 

I linked that page 1...

 

Yes, you did. Sorry. I have too many threads going in multiple forums on multiple sites.

So while I have seen f&r lockers do well, I have seen A-Trac outperform them. I have also seen the magic of crawl boxes and wonderfully low gear ranges. Hopefully before too long I'll be able to pursue dropping my ranges.

 

4wd lo
atrac on
elec locker engaged

you still have electronic limited slip up front, both front wheels will
work for you, one will not just spin, if one spins it gets braked and the other
one will move, and the engine doesn't cut power on you

front lsd is not auto-lsd which means rear
front lsd is atrac

 

anywho in 4lo/atrac/locked in rear, my trucky is pretty much gonna creep up and out of anything

 

So much miss information about atrac and the traction control systems on these trucks.

Atrac works only in 4lo.
Atrac works without the locking diff engaged at any speed
Atrac also works with the rear diff locked at up to 3mph


If you actually had a TRD off road 4x4 and watched the dash you would notice that if you were in 4lo with rear diff locked and turned on atrac, the track off light would turn off and atrac would light up, and if you actually wheeled your truck and got it into a situation where it was needed you would understand how it works.

 

I know about yellow wire mod and what it does. I wonder if there is something similar to use a trac in 4hi?
Ideas?

 

I know it has trac. But all I read says atrac is way more agressive. Less wheel slip etc

I haven't had a chance to use either so Idk how each feels

 

I Google and found a few fj threads asking about it. I figured there is some reason there is nothing on it.

 

yellow wire mod is for those poor saps who have a trd sport or base and want something better than just open diffs in 4 LOW. It tricks the system into thinking its still in 4hi when its actually in 4low, allowing one to have some traction aids in 4low

The "extra aggressiveness" you get with ATRAC is mainly due to the fact the TRD OR's have an electric boosted master cylinder that has 4 channel control right at the master cylinder. Braking pressure is almost 2x that of the standard setup on the vacuum assisted models. So in actuality the AutoLSD in 2wd, or "trac off" mode in 4hi is much more aggressive than those same two modes on a base / trd sport.

In 4 low with atrac you get some added fidelity, in that the computer becomes less lenient (compared to autolsd or 4hi trac off) on how much difference in rotational speed there can be between either side on the same axle.

 

Well I hope you feel better about yourself. SMH.
I did not supply any misinformation and your second paragraph is what I said in a different manner.
As for your third paragraph, no, since most of the time I am locking in the diff I am climbing narrow tree lined muddy or wet clay inclines that don't provide the luxury of leisurely playing with the buttons, I haven't disengaged a-trac with the diff locked to see if the light comes back on.
As for trac, that is really only for the Street and i normally hit the VSC button

 

Can I help? I wrote many of the system explanations after getting my 2010 Off road 4WD Tacoma, and finding no help in the owner's manual or the salesmen. I took my truck into the extreme, hill climbs, deep ruts, loose rocks, when it was brand new... then down to Baja to the bottomless sand beaches, silt, and other challenges there.

This is my third Off Road 4WD Tacoma (2001, 2005 before), but the first with traction controls and A-TRAC.

My 2010 is a superior factory stock off road vehicle to all the others because of TRAC and A-TRAC, they are simply amazing systems that utilize one of the strongest components in our vehicles today, the brake system, to achieve the traction ability that otherwise requires lockers or clutch packs inside differentials (either expensive or prone to failure).

TRAC (Traction Control) gives effective front and rear limited slip, specially in the TRAC-OFF MODE (which is TRAC with engine output regulation turned off). 2009-2011 is normally in this mode in H4 (no light). In 2012, they added TRAC with regulation to H4 and now you need to push the VSC button quickly to turn the regulation OFF, for unregulated power to turn the wheels with traction, while braking only the spinning wheels so more power goes to the tires with traction. A TRAC OFF light has been added in 2012.

A-TRAC (Active Traction Control) is a far stronger system than TRAC and actually MATCHES tire rotation across the axle... as does a locking differential. While is uses the (ABS) brake system, it does work in low range and with the rear locker on if you get stuck, to get you out (up to 3 mph).

Frankly, you don't really need the rear locker with A-TRAC available... as having this on the front and rear makes the Tacoma feel like a Sherman Tank in its crawling and climbing ability. I have used the rear locker with A-TRAC when pulling others up grades they could not climb, so there would be not throttle regulation, as there is some in A-TRAC to help stop tire spin. If you are using A-TRAC and come to a steep/rock/ anything that halts your forward movement, you MUST put your foot down and power over that tire block. The A-TRAC will 'wake-up' and climb over anything. It is an automatic locker-like system... and is not "on" until you have tire spin. You are in open differentials until it is "active", then if a tire lifts off the ground, is in mud or loose rocks, and tries to spin, the A-TRAC brakes it to a point it rotates with the opposite tire that can still drive you ahead. Open differentials mean easy turning on trails. Lockers on make turning very difficult.

Even with just one tire on solid ground, including a front tire, climbing up, the A-TRAC will pull the truck out of a stuck. A rear locker only would be useless if both back tires are spinning.

A-TRAC is indeed an amazing device. Never go into Low Range without it!!!

See the video clips in my signature...

 

true but I use my locker and atrac when I get stuck in atrac on a steep hill with mossy roots, I need to
make the rear 'fetch new grounds' so to speak, and by locking the rear it will hunt a bit more and the
rear will wiggle side by side and find the edge of the rut or pick me off the root I am stuck on

but yes atrac is pretty amazing it is essentially brake-computer LSD front and rear

 

Took a few minutes to play with the A-trac and Diff lock buttons yesterday morning.
I did not get to light up the AutoLSD lights or have the A-trac light go off as my back yard is grass and I did not want to spin the tires and have to re-seed the ruts.
Yes I probably had a few too many beers the night before and did not realize how groggy I sound.
Hope this helps.
https://www.youtube.com/watch?v=DGxchl4AuUk

 

Thanks for your video...
Here are some notes on what I am seeing.
1) 'Auto LSD' [regulation off] with quick push only works in H2 (you were in H4). More traction for 2WD (limited slip).
2) 'TRAC OFF' light is only on 2012+ (2009-2011 are in Trac normally [with regulation off] without any button push or light).
3) Turning VSC off (holding in the button while stopped for 3 seconds) is also turning off the front and rear limited slip (TRAC). The truck is much more capable with that on. 2012+ Tacomas: quickly press the button so regulation is off for max. power to the wheels.
*Yes, if you have brief wheel spin in H4 with Trac or Trac Off, you do get a beep-beep-beep. With that off, you lose so much improvement over the open differential only trucks. I had both, I know!
4) The rear locker engages easy if you turn the steering wheel over one way and roll a bit. With A-TRAC, no fuss getting the locker to engage. Try keeping the locker only for an emergency (as the manual says) and just keep A-TRAC on in L4.