4Hi Max Speed?

How s that work?

 

Holy crap Noah, with that much rock in the truck bed you can go wherever you want. Have you ever gotten it stuck with that much weight in it?[/QUOTE]
Kuul...in SC with a few inches of snow. Extra weight is always good for better traction.

 

You just put it in 4HI.....

 

Sure. I get that part, but don t you have to be movingat least like 25mph for it to engage?

 

Not in 4HI. 4HI will engage sitting still.

 

Well that s news to me. I ve always been told that I needed to be going straight, about 25mph, and foot off the throttle for 4w drive to engage properly. I ve never even tried to engage it while at a stand still.

 

Don't go by what you are told. Read the users manual or pull down your driver side visor

 

I agree. Thing is a Toyota service manager told me that

 

I rest my case.

 

Holy crap Noah, with that much rock in the truck bed you can go wherever you want. Have you ever gotten it stuck with that much weight in it?[/QUOTE]

I've been stuck a lot lately... but I also had zero weight in the ass. I don't normally drive with that much weight back there.

I'll bite the man-card bullet here, and link you recent posts. No shame.
189
Aftermath of 189

I feel like enough time has passed. During that week when "189" happened I was under a shit load of stress from everything. Life was hitting me with triple whammies daily. I actually lost motor function of my whole body, but was conscious and aware of what was happening. I just watched my truck drive off the road helplessly... I wasn't scared. I just couldn't move to be scared. That's why I didn't say anything in the clip. I posted that it was a hydroplabe, but it wasn't. I was just ashamed that it happened at the time.

I've had stress blackouts before, but that one was strange. The hand of fate. I found my first grey hair yesterday.
Where I normally park for the "most recent" link
Most recent

 

A lot of good advice given in this thread.
I got into the habit of performing brake checks before i need to stop to understand what level of traction is available during current conditions.
One thing not mentioned yet is TEST and understand your ABS. My Tacoma's ABS was extremely sensitive in the snow. I could stop sooner with ABS off than with it engaged.
Just be aware turning off ABS reduces your ability to steer. when stopping in the snow, you should always be stopping in a straight line anyways

The fundamental goal when driving in snow is to prevent breaking traction between the tires and the snow. (skid condition)
The weight of a vehicle will compress snow as the tires roll over it.
This compression actually allows snow to pack into the treads and creates friction for the tire to grip.
When the snow is compressed, it is now a barrier between the tires and the road.
When you lock up the brakes or press them harder than the friction provided by the snow, you essentially shear the snow in the tread off of the base layer.
The snow in the tread, now further reduces the tires ability to regain traction. No different than a tire coated in mud.

I have encountered situations that being in 4x4 helped me stop sooner, but overall, i agree with everyone's comments about a false sense of security.
In extremely icy conditions, 4x4 mode helps distribute braking force to all 4 wheels.
Brake systems are proportioned so that the front brakes do the majority of the stopping.
This is bad because on initial application of braking force only 2 tires are attempting to slow vehicle not 4. (2 contact patches attempting to stop not 4)
This means it is easier for the brakes to break traction and initiate a skid for the front wheels.
4x4 mode will help distribute front braking force through the driveline and provide a more uniform stopping force to all 4 point of contact to the ground.

 

You can out your truck in 4wd in park...

 

That’s what I do too. I live in the country and if it’s snowy I’ll hit the brakes hard on my empty road to test how slick it is. Also drive in S mode and downshift to slow down instead of using the brakes if it’s bad. I’ve said before 4wd will get you moving, but the tundra is heavy and not much will stop it on ice.

 

This is interesting. When I first read this I thought it was due to the fact that the manual said to put it in 4 WD something like once a month for 10 miles. Then knowing the top speed in 4 WD becomes important.

Note sure if the intent of the OP. But when in dry conditions, I engage the 4 WD when going down a straight roads and keep it under 55 MPH.

 

Try it. I just put mine in 4hi and then 4 low this am sitting still in neutral. No issues, but I follow the owners manual and use 4wd monthly for 10 miles at least. When I first got the truck it would take a while to come in and out of 4wd but it's working well now.

 

Guys, there’s no top speed for 4H, only for engaging it. Obviously, driving within environmental “conditions” often requires moderation when in 4wd, but if you’re out bombing in 4wd for the added traction somewhere in the open where conditions allow, you don’t have to slow your roll because of some upper limit.

 

Slightly off topic but I’m an ex rally driver from the uk and competed on the wrs which had events in norway. It’s where kimi learnt to drive.. long story short.. we drive a lot faster then 55 mph on ice and would not dream of doing it in a 2wd car..

 

Interesting question. I have the same one. I do not plan to go 100 in the snow. But the manual mentions engaging the 4 WD from time to time (don’t remember the exact time frame).

I do this when driving on a straight road. Engauge 4 WD High and drive. Sometimes on the highway, I can hit 65 MPH. So is that safe for the truck?