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I have 2H/4H/4L, where is 4A?

isthatahemi

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Well it’s not “awful” I like it. I like the green gauge color. I like the softer pedal. Makes it even easier for me to stay in electric mode. I suppose if you don’t have a powerboost then eco mode is less useful. I’m one who drives my truck most of the time for efficiency and mpg. So every little bit helps. Having said that. I have tested both modes and yes in normal 4A stays. Eco goes back to 2H.
We all have opinions, no need to try to correct to others who have different opinions.

That said, perhaps eco is not as obnoxious in a Powerboost, or at lower speeds. I prefer my throttle deliver power, not discourage it.
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astrand1

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We all have opinions, no need to try to correct to others who have different opinions.

That said, perhaps eco is not as obnoxious in a Powerboost, or at lower speeds. I prefer my throttle deliver power, not discourage it.
Well you could say you’re trying to correct me for correcting you. Rather I was not correcting you I was stating my opinion that in fact it’s not awful to me. In fact it’s much smoother for my driving habits. I don’t drive my truck hard where as you might drive yours harder and that’s fine. And in a non hybrid truck I would say that eco mode is pretty useless IMHO. And just to be clear even in eco mode if I put it to the rug this thing will take off like a rocket. I’ve been known to give it the old Italian tuneup from time to time.
 

Los150

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Mt '23 Platinum stays in 2H almost exclusively unless it's raining a lot. Then I switch it to "slippery" which also switches it to 4A.
 

HammaMan

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Mt '23 Platinum stays in 2H almost exclusively unless it's raining a lot. Then I switch it to "slippery" which also switches it to 4A.
Functionally there's very little difference between 2H and 4a in 22 and up vehicles with the 4a transfer case. Your front driveline and propeller shaft are always engaged and spinning. For 22 and up 4a transfer case vehicles you're better off staying in 4a as if power is needed to the front wheels the clutch will provide it. There's really no reason to select 2H at all and I'm surprised they even left the button in place.
 

isthatahemi

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Functionally there's very little difference between 2H and 4a in 22 and up vehicles with the 4a transfer case. Your front driveline and propeller shaft are always engaged and spinning. For 22 and up 4a transfer case vehicles you're better off staying in 4a as if power is needed to the front wheels the clutch will provide it. There's really no reason to select 2H at all and I'm surprised they even left the button in place.
Functionally there's a huge difference. Mechanically there is not.
 

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Snakebitten

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I can see both points of view.

But it's definitely true that with my 2022, absent of the infamous IWE, even in 2H I'm not really reducing wear or saving much fuel between the 2 settings. That transfer case clutch is the only piece of the puzzle that differentiates "wear".

And honestly, while I have seen examples of high mileage or abused front differentials needing attention, I don't know if I've heard of worn out 4A transfer case clutches. Of course these Sans-IWE trucks haven't existed that long either.

I do know that I put about 36,000 miles of 4A on my 2018 F150, tuned and lots of dry weather Sport mode, and never had an issue.
 

isthatahemi

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I can see both points of view.

But it's definitely true that with my 2022, absent of the infamous IWE, even in 2H I'm not really reducing wear or saving much fuel between the 2 settings. That transfer case clutch is the only piece of the puzzle that differentiates "wear".

And honestly, while I have seen examples of high mileage or abused front differentials needing attention, I don't know if I've heard of worn out 4A transfer case clutches. Of course these Sans-IWE trucks haven't existed that long either.

I do know that I put about 36,000 miles of 4A on my 2018 F150, tuned and lots of dry weather Sport mode, and never had an issue.
Yep - I'm 70k km's almost all tuned, 4A 24/7/365 and not being kind to it other than very few boost launches (work truck). That said, I too have previously had front axle issue, broke one and had rebuild on others, strangely....never on my fast trucks I abuse for fun, only on the work trucks.....hmm.
 

HammaMan

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Functionally there's a huge difference. Mechanically there is not.
Traction is one of those things you don't notice until it's gone which is why 4a trucks of 22 model year and above can leave on due to no mechanical difference and functionally it'd remain transparent. Particularly for this time of year with a truck it's a given to leave 4a on.

Dry I stay in 2H as I've still got the IWEs present unless I'm looking to play. Currently tuned around 570hp/700tq on unmixed pump gas.
 

Samson16

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My H3 doesn’t have the 2H option. It’s full time AWD, 4H lock, 4L lock.

If I had 4A in my truck that’s what I’d use daily. 2H seems unnecessary unless there’s something wrong with the 4A imo.
 

air2mag

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Ok, so I learned something new. I guess my switching to 2H is a habit from the “old” four wheel drive years. Wet or slippery days I would always switch to 4A, but clear and dry would be 2H.
 

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isthatahemi

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Traction is one of those things you don't notice until it's gone which is why 4a trucks of 22 model year and above can leave on due to no mechanical difference and functionally it'd remain transparent. Particularly for this time of year with a truck it's a given to leave 4a on.

Dry I stay in 2H as I've still got the IWEs present unless I'm looking to play. Currently tuned around 570hp/700tq on unmixed pump gas.
I agree with the mechanical part, and I don’t mean to be rude, but you’re misusing the word functional.

Functionally 2WD is completely different than 4A

On the non IWE trucks, mechanically, one variably energized clutch solenoid is the only difference.

Not trying to be pedantic and you clearly understand the system, it can be confusing for most other people who know English better than mechanical stuff.
 

Snakebitten

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And you have to know Hammaman sometimes to get a certain context.

Or to put it another way, if you have read many of his posts, it makes a difference. Which can be said about a lot of the contributers, I admit.
 

JBdoingJBstuff

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Its fun to whip the rear end around in 2H. Did it a bunch this morning on the way to work. A few inches of snow on the ground here.
 

SALEEN961

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And you have to know Hammaman sometimes to get a certain context.

Or to put it another way, if you have read many of his posts, it makes a difference. Which can be said about a lot of the contributers, I admit.
Don't read too many of my posts, my proofreading is terrible. Predictive text always "corrects" valid words into completely different words that I didn't intend to use and I fail to identify these "corrections" way too often.
 

Snakebitten

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Don't read too many of my posts, my proofreading is terrible. Predictive text always "corrects" valid words into completely different words that I didn't intend to use and I fail to identify these "corrections" way too often.
Too late. :) I've read quite a few. At least in the threads that I am drawn to. (which is the vast majority)

I think you are being a little too hard on yourself, by the way. Lol
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