this post was submitted on 10 Aug 2024
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Weird News - Things that make you go 'hmmm'
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Subaru has x-mode for difficult terrain, which is different gearing. They also have hill descent. https://www.sportsubaru.com/subaru-x-mode.htm
Why would you want 4wd with wasted energy when you could have symmetrical awd and get all the power to wheels that have traction, skipping those that don't have traction?
I only see awd outperform 4wd when it comes to a subie, but other awd systems from other manufacturers are probably not up to snuff.
Edit: meant to say symmetrical awd instead of slip differential.
What color is your Subaru?
Was metallic gray, can't see the paint any longer. Dented, scratched, and brown. You okay?
What color is your jeep commander that sits in a driveway 99% of the year?
Kinda greenish blue
I didn't down vote you, but you've got some misconceptions.
X-mode isn't actually different gearing in the mechanical sense. It's an electronic system that optimizes the existing drivetrain components.
It doesn't provide additional gear reduction like a low-range gearbox, it adjusts the CVT's (continuously variable transmission, which doesn't even have "gears" in the traditional sense, but is a set of chains and pulleys) behavior, traction control, and power distribution, but doesn't change the fundamental gear ratios. Hill descent control is a braking function, not a gearing one.
True 4WD systems have a physically separate low range gearbox that allows the driver to physically engage different gears to vastly reduce the gear ratio to allow the vehicle to make much more efficient use of the available engine power.
You would waste far more energy trying to get an AWD Crosstrek over a boulder with X-mode than an actual 4WD vehicle with a lever to put the vehicle into 4 Wheel Low gear.
While excellent for many things, Subaru's AWD system is essentially a fancy electronic traction control system. It cannot reduce gearing to the level of a 4WD low range gear box. And that's fine! But the incorrect assumptions of people who overestimate the capabilities of their vehicles is the precise reason for the rules the NPS has in place; Subaru Crosstreks with X-Mode are gonna need to be rescued by NPS staff far more often than 4Runners with a low range gearbox.
Subaru marketing is great, but NPS roads with AWD restrictions are not rally stages in a Finland forest, they are roads with boulders or mud or deep water or sand or many other things that a 4WD vehicle will probably be able to handle, but an AWD vehicle will probably not be able to handle. And on these roads, if you get stuck, a park ranger is going to have to rescue you, at tax payer expense, because you thought your vehicle could do something that it could not.