Crawl control worth it?

When the question first came up in another thread about the lower mileage of the OR, I was a little surprised after reading a whole bunch of posts there was not universal agreement that the air dam was the one big significant factor......and then just move on to our usual bull shit around the topic. That people are providing more relevant causes in their mind is shocking...simply shocking beyound belief.

 

One question I have is why the 4x4s have worse mileage. I get it when 4x4 is engaged, but is the mileage less even when not engaged? If so, why?

 

Til now, it was higher chassis and more drag. The 2 wd 2016 may show to have lost mileage with the standard clearance now being 9.3 ". Second, weight of the extra drive train. I believe too the half shafts to the diffenrtial still turn which is a slight drag. Overall, it easily accounts for the slight couple miles per gallon difference. After purchase.......The other important thing is, most 4 wd owners use more aggressive treads because they anticipate using them in mud and snow. That I feel is a big factor...tire choices.

Optional equipment and mods around here like boat racks and different bumpers, all on 4 wd shakes up aerodynamics. People who own 4 wd tend to live in tougher locations like yours and equip them accordingly.

 

Oh, I see. I didn't realize the drive chain differences would amount to a measurable difference.

 

Why is everyone so defensive and misrepresenting what others say?

I am looking at everything that makes the TRDOR 4WD different. I agree the air dam is a major factor, I never suggested otherwise. You fail to mention the different tires; but, I am not suggesting that you are an idiot and that you don't think they have an impact. (Update: you just did.) So, we agree air dam is not 100% at fault.

I know; that's why I brought it up. Yet you say it takes power driving in a straight line? The hydraulic pump is; however, always running.

Then why didn't you just say that it uses the hydraulic pressure from the power steering pump? (Or does it not?) Then, I could have asked if the power steering pump is the same as non A-TRAC/MTS. If it's the same; then, I believe it has little/no impact. That is why I am asking. You may be right in saying the braking system has no impact; but, you have given no logical reason why not. (Broken clock is right twice a day.)

Air dam is not 100% of the difference. What fuel numbers? Fuelly? I don't see a 4WD selection anywhere. A-TRAC/MTS is only available on 4WD, no?

 

4x4 gets less mpg because of higher inertia and rotational inertia. It's heavier and there are more parts to turn. Also, when at speed, there is more mechanical drag.

 

Thanks for not calling me an idiot..much appreciated. I feel as Toyota does in interviews that aerodynamics plays a big role bigger then tires. That's why I did not mention them. The standard tires on an OR have the same outside diameter as on a 2wd OR.

 

I am not comparing 2WD to 4WD OR; I am comparing 4WD OR to 4WD non OR. The thread is: Crawl Control worth it? If vehicles with CC get worse mileage because of CC this should be considered in determining its worth, right?

 

Only you have mentioned electrically powered brake booster ONCE. Forgive me if I don't trust you. What I find about the brake booster says:

"...CRAWL Control and Multi-terrain Select have been adopted for the A/T models equipped with
Hydraulic Brake Booster"

Also, other vehicles have hydraulic brake boosters powered by the power steering pump.

Where are you getting fuel economy numbers?

 

We're talking about the BOOSTING system. It could be vacuum, hydraulic, or electrically boosted. Internet says hydraulic; you say electric. Can you show us anything that supports your assertions about electrically boosted or mpg?

 

I spend a lot of time off-road and I've never had any problems without the latest nanny switch. In fact, I did the 'locker any time' mod just so I can turn off the nanny systems I do have when I'm off-road. Know how to drive, know the vehicle's limits, and there shouldn't be any problems.

 

I hear you.....I would think the easiest way to test this theory, and it might be worth doing considering we agree that air dam is the biggest contributor, is for an OR owner to take his mileage then see if he can't add a factory air dam. It should not be too hard to do. Do the mileage again and see the results. Then make a judgement to see if it added enough to put your theory within a margin of error. I see people doing it if possible. At least I would try if I had a 2016 OR.

Heck..If I we a smart ass with a gen2 OR without CC, I would add a factory air dam from 2016 and see if it gets the same gas mileage as the most economical gen3. If it does, So much for alternate theories but worse, so much for the minivan motors and the atkinson cycle.

 

That is what I plan on doing if I can find a free/cheap air dam (and a 16 to put it on). It doesn't affect approach angle that much and should be easy enough to take off for the rare occasion I go OR.

 

I said the booster was remotely boosted 10 pages ago. I think you were the one who said I was wrong and offered no evidence

 

Free cheap air dam ? Well, so much for the experiment.;-)

 

Me? Never said you were wrong; but, you are. There aren't yet 10 pages in this thread.

My question is how is it boosted exactly? Hydraulically from the power steering pump as in many other non-vacuum boosted brake systems or electrically? It would be nice if someone could post some corroborating evidence. I still haven't found anything conclusive.

 

Is it worth it.
1 you still have ATrac
2 it didn't cost much in additional hardware
3 it was field tested in other products for several years
And last....it has cool switches making your overhead console look like a plane

 

I see people saying they took theirs off as soon as they got home from the dealer. Any idea how much Toyota charges? Now I feel off-topic.

 

Show me oh wise one.

 

There isn't much additional in the way of hardware going on that the entire truck does not already have. It just coordinates all existing systems as far as anyone can tell. What is new other then switches and software... And maybe the midget driving it ?