4A
5 Year Member
Joined: Feb 2020
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I have had my IWE make noise a couple times on two different trips. Personally I felt I got a bit less mileage (of course wind and gas changed too) and I felt sluggish, or slightly weighted down. I'm sure the sensation would go away, personally I find the 4A light annoying as well. Additional parts are spinning, spinning parts wear and fail. How much?
5 Year Member
Joined: Dec 2017
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From: Los Angeles and Lake Tahoe
Your IWEs will be engaged and your front drive shafts will be spinning. Personally, I would prefer my front driveshafts not be engaged driving hundreds of miles on dry freeways.
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Joined: Mar 2015
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From: Anchorage, AK
The only major downside to keeping your truck in 4A all the time is what happens IF you want to "give it the beans" while in 4A and needing/wanting to turn left or right. The more power you command, the more the transfer case will command the clutch pack to engage more and more fully. The more that clutch pack engages, the more the driveline is going to behave like a "standard" 4WD system and be less and less tolerant of different speeds front vs rear output shafts. That is very stressful on the system. As long as you're not accelerating hard in a straight line (or nearly so), you'll just have a little more wear on the Transfer Center clutch pack.
Last edited by icecoldak; Mar 9, 2023 at 11:48 AM.
5 Year Member
Joined: Aug 2018
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From: Damascus, MD
This is exactly what they do when they "fix" the vacuum issue with the IWEs. It isn't an issue. And if you watch the wheel power distribution screen while in AWD you'll see the front wheels only get power when you are really on it.
Thread Starter
Captain of Industry
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From: Arklahoma
5 Year Member
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5 Year Member
Joined: Dec 2017
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From: Los Angeles and Lake Tahoe
And it is also why I buy a few of the one way vacuum valves and replace them annually instead of putting on that awful "fix". I don't want the axles spinning if they don't need to be!.
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Bleeds Ford Blue
Joined: Nov 2008
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From: J-Town, NJ
Possibility of it engaging at the wrong time and chucking a rock straight back at your buddy, grazing his right side and continuing on to shatter the driver's window on his VW Passat.
.........not that i would know about that or anything
_
.........not that i would know about that or anything
_
