Newbie to J200 Crawl Control noise question

[chris777]

I have only had our 2018 Land Cruiser a little over a month and took it for my first off road test ride today.

put it in Neutral, in 4wd Lo, center diff lock on, It stopped blinking, then turned on Crawl Control. When driving forward with crawl control on, in any of the 5 speeds, There was a constant clanking and rattling noise coming from front end under the hood that would not go away, unless I stopped forward motion, Or unless I turned off crawl control before moving forward. The manual does mention some noise at first. But this noise was very alarming would not go away. What is going on? Am I doing something wrong? Here is a Dropbox link to a video with its sound and a shot of my instrument clusterDropbox

 

[cboyd]

YouTube crawl control on LC or tacoma and you’ll see it’s the ABS working in conjunction with the transmission to maintain the vehicle speed and traction.

it isnoisy as all get-out.

make sure you’re not doing it on pavement.

 

[marketShark]

Noisiness of system is normal

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These threads are popping up left and right on the 2 hundy forum...ha... Picked up a low mileage 1 owner 2009 LX570 yesterday and couldn't be happier.. This is my first LX, owned a bunch of cruisers.. I wanted a land cruiser, but the LXs are a whole lot easier to find at least in my neck of the...

forum.ih8mud.com

Hello from AZ!

Hi Everyone, New to the forum. I just got my 2008 LC yesterday. Silver with upgrade package, convenience package, side molding and everything else under the sun. Just curious, if you don't mind me asking, how much did you guys pay over invoice? I got mine at invoice after some negotiation...

forum.ih8mud.com

Crawl Control Overheating?

This happens periodically. Crawl control typically engages and operates nominally. But---Routinely the system kicks out of crawl control on a downhill. Temperatures are 15F, I am going down the last quarter mile section of paved driveway and I set it to Rock and a speed of 2. That means I...

forum.ih8mud.com

 

[chris777]

So when descending a couple of hundred yard steep hill off road, I would put my Fj60 on Low 1st gear and not need any brake whatsoever to crawl down safely and in control. Which method is best for this 200? Crawl Control 1? Or no Crawl control and put it in low 4wd and select the first gear in S shift position? When I did the latter, I still needed brake to crawl down slowly.

 

[Madtiger]

So when descending a couple of hundred yard steep hill off road, I would put my Fj60 on Low 1st gear and not need any brake whatsoever to crawl down safely and in control. Which method is best for this 200? Crawl Control 1? Or no Crawl control and put it in low 4wd and select the first gear in S shift position? When I did the latter, I still needed brake to crawl down slowly.

Use CRAWL to go UP and DOWN obstacle/hill/rockledge etc. Feet off pedals unless to go faster or stop. Concentrate on steering. CRAWL works great. Noisy as hell but works amazing in my experience.

 

[jamgolf]

So when descending a couple of hundred yard steep hill off road, I would put my Fj60 on Low 1st gear and not need any brake whatsoever to crawl down safely and in control.

Do the same with your LC200. The crawl ratio is low enough that you won't have to touch the brakes or mess with CRAWL.
That's the advantage of low range, so use it just as you used it in your Fj60.

 

[afgman786]

So when descending a couple of hundred yard steep hill off road, I would put my Fj60 on Low 1st gear and not need any brake whatsoever to crawl down safely and in control. Which method is best for this 200? Crawl Control 1? Or no Crawl control and put it in low 4wd and select the first gear in S shift position? When I did the latter, I still needed brake to crawl down slowly.

I do 1st gear. It won't be as good and slow as 1st in your 60, it does tend to feel a little quick if you're used to a manual or having reduction gears. But I feel safer using 1st and light braking compared to the jerkiness of CRAWL.

 

[bloc]

A 200 is a lot heavier than a 60, so reasonable to assume it’ll behave differently on steep descents. They have similar low range ratios so it isn’t a case of different gearing. I guess in theory the larger engine of a 200 should have more engine braking.. but yeah, I’ve had to use a little brake in situations I wouldn’t have had to in my mini truck.

But I almost never use crawl. Really only if I’m getting wheel spin on a climb.

 

[M1911]

So when descending a couple of hundred yard steep hill off road, I would put my Fj60 on Low 1st gear and not need any brake whatsoever to crawl down safely and in control. Which method is best for this 200? Crawl Control 1? Or no Crawl control and put it in low 4wd and select the first gear in S shift position? When I did the latter, I still needed brake to crawl down slowly.

Put in low, select first gear, then put your foot on the brake. It's not a big deal. Crawl control also uses the brakes.

 

[Madtiger]

Put in low, select first gear, then put your foot on the brake. It's not a big deal. Crawl control also uses the brakes.

Although both use brakes, CRAWL is able to monitor EACH wheel individually and slow/brake the wheel(s) as needed to keep you straight and steady pace as you go down a steep hill...something that a brake pedal with human foot cannot do.

 

[afgman786]

Although both use brakes, CRAWL is able to monitor EACH wheel individually and slow/brake the wheel(s) as needed to keep you straight and steady pace as you go down a steep hill...something that a brake pedal with human foot cannot do.

CRAWL grabs at wheels individually which will cause you to slide more and lose a proper line. Where slow control with your foot won't ruin your line or cause the lock up at a wheel that CRAWL does. It's a good system but it's not better than human control in certain situations.

 

[TeCKis300]

For most typical downhill descents, like most, I generally creep with low range braking in 1st gear.

CRAWL is an added layer of capability on top of low range creeping in 1st gear. It's a specialized tool in the war chest that can do things in extreme situations that creeping in low range cannot accomplish alone.

1) Individual wheel braking - Without lockers in the front or rear axle, in cross axle situations where tires lift, particularly if a front and rear tire lift at the same time, engine braking will no longer have positive speed control as the lifted wheel will freewheel the axle, resulting in a large lurch forward. This is where using engine braking and CRAWL can help.

2) Yaw control - in normal low range creeping, directional control is only by the way front wheel steering. CRAWL has the ability to add tank steer, by controlling the braking of individual wheels to apply a moment to keep the nose pointed where one wants. Especially helpful in slippery or loose situations where steering the front axle is not enough.

It can also do similar magic things uphill.

 

[Madtiger]

CRAWL grabs at wheels individually which will cause you to slide more and lose a proper line. Where slow control with your foot won't ruin your line or cause the lock up at a wheel that CRAWL does. It's a good system but it's not better than human control in certain situations.

Sorry, i disagree with that. CRAWL will keep you in whichever direction your steering wheel is pointing...thus, it is great at keeping you in line down a hill. I would bet that CRAWL prevents sliding more than your foot.

 

[afgman786]

Sorry, i disagree with that. CRAWL will keep you in whichever direction your steering wheel is pointing...thus, it is great at keeping you in line down a hill. I would bet that CRAWL prevents sliding more than your foot.

I've been in a situation where CRAWL is not the option down hill. Try it on a loose/slippery surface and then come back with saying CRAWL is better. It was actually causing the 200 to slide more and get out of the line I was trying to make him follow. CRAWL grabs at the brakes instead of being gradual which is the problem.
If you are on high traction surface sure CRAWL is good downhill.

 

[jamgolf]

a constant clanking and rattling noise coming from front end under the hood that would not go away, unless I stopped forward motion

Admittedly I am not a fan of this system. The noises it makes and the weird seizures that it induces into the chassis are just totally off-putting. If the passengers/kids start asking what is wrong with the car? then something is half baked as far as I'm concerned. Just not my cup of tea.
Fortunately, the vehicle is immensely capable even without this "feature" - so you can rely on low-range, center diff, MTS, and brakes and go pretty much where you want to go.

Or unless I turned off crawl control

As far as I am concerned, the best setting for CRAWL is OFF.

 

[Madtiger]

I've been in a situation where CRAWL is not the option down hill. Try it on a loose/slippery surface and then come back with saying CRAWL is better. It was actually causing the 200 to slide more and get out of the line I was trying to make him follow. CRAWL grabs at the brakes instead of being gradual which is the problem.
If you are on high traction surface sure CRAWL is good downhill.

I have actually used it downhill while off-roading...it was uneventful. I guess YMMV.

 

[chris777]

Armed with confidence from this forum that the noises were normal, i went back to the steep dirt hill and tried crawl control again. I got used to the noises after half a dozen climbs and descents and it allowed me do what i like doing, going down a steep descent without my foot on any pedals, and actually allowed me to climb back out without any pedals. I just used the control knob to adjust my speed. All i had to do was concentrate on steering and looking at the monitor and out the windows. I tried it again without crawl control in 4wd low is S gear 1 and was fine, but i did have to use my brake the whole way down, which could heat up the brakes if doing it for longer distances. I forgot to try out the DAC button which is a button that uses extra engine breaking i believe.

thank you for your help in learning my new Cruiser today,

 

[TeCKis300]

I've been in a situation where CRAWL is not the option down hill. Try it on a loose/slippery surface and then come back with saying CRAWL is better. It was actually causing the 200 to slide more and get out of the line I was trying to make him follow. CRAWL grabs at the brakes instead of being gradual which is the problem.
If you are on high traction surface sure CRAWL is good downhill.

I can definitely see in a sidehill situation, that using CRAWL could be a liability to lateral traction. Probably also a good time to turn off any lockers as it could also result in loosing lateral traction.

 

[chris777]

This is why crawl control is important to me. This is me in my FJ60 on the Hole in the Rock Trail (not road) just south of Lake Powell. This is my forst time i have ever had an automatic for off road driving. Want to crawl without using brake.

 

[turbo8]

Those are some sticky tires.

Crawl control uses the brakes.

This is why crawl control is important to me. This is me in my FJ60 on the Hole in the Rock Trail (not road) just south of Lake Powell. This is my forst time i have ever had an automatic for off road driving. Want to crawl without using brake.


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