Auto LSD

Does that mean auto LSD is better than the rear only e locker?

 

With in the first week of ownership I took the truck to a place where I could get some traction limited situations happening. I played with the truck in each mode to see what it's reaction was. Then when it was time to drive in snow in traffic I had a better understanding of what to expect.


I drove 5.0L Mustangs for years. The only traction control device I had then was my right foot. This is the first vehicle I have owned with these traction and control aids. I am very impressed with their abilities to find traction and move the truck forward. I am also impressed with the system to not over control the truck when you are having a little fun wagging the tail on slippery surfaces.

 

Yes and no. It depends on the situation and needs of the driver.

 

No, not imo

 

How did they get the lsd to engage while in 4lo even though the manual clearly states only in 2wd mode? Is that what they are saying when they say that they think it's always engaged no matter what differential is spinning?

 

Yes, the button just seems to make it act more aggressively.
I wish people did the research when they think they know what they are talking about.

 

Oh you mean me asking questions right now is not doing research? Haha awesome. Thanks for your time kind sir

 

Nope, that was not directed at you at all.....

 

TRAC is doing the work you see in the video.

TRAC is active in 4Lo by default (on the Sport/SR/SR5/Limited trims ONLY).
No button presses or anything, just put it in 4Lo.
(NOT TRUE for OR/PRO trims, in manual or automatic)

TRAC is also available in 4HI, but only with VSC active which is pretty aggressive on limiting throttle. Any button presses in 4HI will deactivate TRAC = which means open diffs without any electronic LSD effects.

And no, this is NOT described in the owner manual in any kind of decency.

 

That is what I did also, as well as experimenting on pavement since this is my first 4wd vehicle and am not a fan of the electronically controlled T case and front axle.

We have had a few vehicles with TC / ESC now. I hated every one of them except for the Taco. Like you said, it is not intrusive and seems to work really well in low traction situations. The problem is that we have at least eight modes and the manual is pretty weak about describing their function.

 

Do I sense sarcasm? I think yes refardless if sarcasm is present in our conversation, I always encourage it.

 

So what is the difference between trac and limited slip?

 

BTW, @gudujarlson did some great hill testing a short time ago comparing TRAC / AutoLSD, etc.

https://www.tacomaworld.com/threads/traccontrol-or-lsd-in-4wd.646499/page-3#post-22474647

 

The TRAC system simulates a LSD by applying brakes to the higher speed wheel. End result is similar to a LSD, but by no means identical.

 

Nope, no sarcasm at all

 

TRAC also cuts the throttle if you spin the tires... Toyota calls it "Engine Output Regulation" [let's use EOR].

'EOR' happens first then the brakes kick in on the spinning tire, in the standard TRAC mode.

AUTO LSD (H2) and TRAC OFF (H4) has NO EOR, just brakes on the spinning tire(s). Thus, it is a stronger limited slip system than TRAC, so you can move ahead from a stuck. Press the VSC Off button quickly, moving or stopped.

VSC OFF is what turns off the limited slip and stability control. Press and hold in for 3+ seconds while stopped.

Pressing the button quickly again or restarting the truck returns you to normal TRAC mode.

For the OFF ROAD TRD 4X4s, even stronger than TRAC OFF is A-TRAC or MTS (multi-terrain, adjustable A-TRAC). A-TRAC is closer to lockers on the front and rear... A-TRAC/ MTS don't just slow a spinning tire, it halts it to match rotation with the other tire on that axle, just as a locking differential does.

CRAWL and DAC are cruise control features when crawling in low range so no need to touch throttle or brakes (unless you want to stop)... just steer!

*I will add that I have yet to test 3rd Gen modes to see how they are different than my 2nd Gen.

 

Yep. I got flamed in one of these threads in the past when I told someone to quit confusing people with incorrect info.

Person didn't know the system and assumed it was like their completely different system. Looks like we are there again. *sigh*

 

Think of auto LSD as working across an individual axle. When it detects a threshold of mismatch in wheel speeds it brakes the faster wheel to get torque to the slower wheel. Since it's braking across an open diff whatever torque the braking wheel is driving through is the same torque reaching the opposite wheel.

Trac or traction control in 2wd works a bit different and attempts to correct slipping of powered wheels using both individual wheel braking and engine regulation. It also determines rear wheel slippage by referencing front wheel speeds and not just wheel speeds across the axle and thus can make corrections if both rear wheels are spinning equally. This is how it knows if cutting engine output is appropriate.

 

https://www.tacomaworld.com/threads/3rd-gen-traction-control-modes-explained.530695/

 

Yea I was in a pickle today and tried it. My right back wheel was spinning and I could have really used the power on the left wheel. I could feel the system activating but it didn’t help at all. And i really wasn’t stuck that bad. I ended up full sending it and got myself out.