Driving in Snow/ 4wd

Awesome, thanks for the help.

 

You should be ok tire- wise then.

 

Thanks so much for the advice I appreciate it! And beautiful picture

 

What do you expect traction control to do, drop an anchor ? If you slip, it means there isnt enough traction. Traction control can not magically generate traction.

On snow on ice it is generally better to not break while turning. I try to break before the turn and release the break during the turn, of course the key is to not go faster than the elements allow in the first place. Breaking while the vehicle slips cause the back end slide more and cause oversteer (hence the 180), if you did the same turn without breaking it would probably still slide, but it would be more like a drift slide and be more controlled.

 

Lol smart ass. I didn't expect TC to do anything. What I meant was the truck didn't register the slide. Normally TC would start beeping and "kick in."

 

TC wont register a slide, it register tire spin... It wont register any slide on any surface unless there is a major difference between tire speeds. When you slide on ice with breaking, all tires have more or less the same speeds

 

Doesn't tc automatically disable in 4h

 

I think it still works but with different constrains. If you disable traction control with 4H, diffs become open since traction control doesn't simulate LSD by breaking.

 

That's 4lo

 

You might have been going for the simple answer here, but the system does have steering wheel angle and yaw sensors. It will try to react and correct in a slide. But like you said, the available traction many not be there to actually do anything.

Edit: I confused 4Hi and 4Lo defauts. You are exactly correct. My bad!

It can be toggled with a Short Press of the TCS Off button, as well as a Long Press while stopped to turn VSC Off.

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

For my Sport:

4Hi Default:


4Hi Short Press:


4Hi Long Press:

 

Most guys sound like they are full of shit around here , you sound like you know what you are talking about .

 

I think that system only works if you are accelerating but not breaking. It can try to correct a slide during acceleration by diverting the power to tires that have more traction etc. But during breaking, I dont think it can do anything even on pavement (aside from ABS function).

 

Well, I'm usually an RTFM guy, but the manual was really weak in this section. A bunch of us worked to get that sorted out. Of course, it did take some mall crawling to figure it all out.

A couple ramps was a no go:


But, this spot worked out well:


The non-OR / non-Pro models will move with wheels off the ground.

 

Sorry, but 'Braking.'

Actually, the system works under all conditions. Default, it uses input from all sensors all the time. Back in the day before stability control but with ABS, you could essentially get stability control in a slide by getting on the brakes gently. It would get the ABS system to do its thing and attempt to straighten you out.

 

This is a really good video
https://www.youtube.com/watch?v=BXYFxXUcdYA

 

I am really surprised brake assisted LSD system doesn't kick in to stop tires of the ground from spinning. Do they spin like an open diff or the break system tries to divert the power put isn't successful? I wonder what difference OR or pro has since they all have the same brakes and diffs. Sounds toyota intentionally limited their software on no OR or pro models.

 

Actually once your in 4wd you get 50/50 braking front and rear as opposed to 70 percent front and 30 rear, slippery conditions you don't want more front brake.
https://www.youtube.com/watch?v=fMHSBXjiyac

 

Why? Isnt 70/30 braking is related to the weight distribution and direction of the momentum. It doesn't change with having traction on all 4 wheels or 2 wheels. Imo the only thing 4wd can help in terms of stopping is if you use it in part with engine breaking going down hill.For example 4L will prevent you from accelerating much down hill even without braking

 

Very true. I just wish that they would edit it to correct the descriptions. Although, that does more to explain the traction modes more than the VSC modes.

If Auto LSD activated, you would get less control by breaking both rear wheels loose. The brake being activated on the spinning wheel stops that. If too much power gets transferred through the diff, both brakes will activate or the engine will cut power.

Non-OR / non-Pro have a standard vacuum brake booster. The OR / Pro have an electric brake booster that provides much higher line pressures. It can brake each wheel more precisely under higher torque. That is the backbone of CC, MTS, and / or A-TRAC. That said, the TRAC systems on the non-OR / non-Pro is quite good. It is the only TC system that I have ever not turned off at the start of each trip.

 

Yes it does, the amount of friction will vary with brake levels