Yeah Richard, it's true most cars/crossovers/SUV's (not all) are front wheel bias. My INFINITI QX50 is rear wheel bias. I think INFINITI does this because they are more performance oriented.
The animation where it shifts is wrong. It shows only the rear wheels engaged while it's on "4H" (4 High) which is already 4WD/AWD. Then it shifts to 4L (4 Low) which is pretty much the same like 4H but with a different gear ratio - a lower one, hence the name.
The difference in offroading has more to do with the ground clearance of the particular vehicle, as most AWD's are actually cars.. I have a subaru_ outback, and it is a hell of an offroader ( for a car ) ! Had it more ground clearance it would have no problem with hard_core offroarding... ( if a diff. lock is built in ,that is )
1:40 what?why does it send power to rear wheels if on highway or something? fuel economy is best on FWD cars not RWD... and in the case of AWD sending power to just the rear gets better MPG? is that what im hearing? i dont think so.
Super late response but FWD fuel economy is generally better than RWD fuel economy mostly because FWD cars don't have to waste a lot of weight sending power all the way to the rear of the car. When the car is already set up to do that, sending to front or rear doesn't have any benefits cause the weight is the same. Sending to the rear DOES have performance improvements though like mitigating under-steer and having better power during acceleration.
I'm really confused!.. You claim that "the system sends most of the engine power to the rear wheels for maximum fuel efficiency" but transferring the power to rear wheels instead of front wheels is unefficient in terms of fuel efficiency due to mechanical frictions while transferring the power via axles! isn't it?
Yeah I think this part is wrong, I have an automatic Subaru and I'm sure I've heard that most of the power is kept at the front wheels, unless you lose traction and it can do half half
Vw states 90 percent goes to the front. Subaru’s crosstreck sends 70 percent to the front most of the time. Audi and other sports cars send more power to the rear wheels for handling
maximum fuel efficiency derken awdye kıyasla söylüyor, dört tekerleğe göndermektense arkaya göndermek daha az benzin yaktırır. öne göndermek her zaman az yaktırmaz awd tasarımına göre değişir. bazı awd sistemler gücün tamamını sürücü istese de ön tarafa aktaramaz çünkü arkadan çekiş baz alınarak tasarlanmıştır. bazıları da tam tersi arkalara gücün tamamını gönderemez çünkü arabada arka tekerleklere giden tüm motor gücünü kaldırabilecek bir diferansiyel yoktur. yani eğer awd sistemi önden çeker baz alınarak tasarlanmışsa öne gönderince daha az yakar çünkü önlere gönderince ortaya çıkan güç kaybı arkaya gönderince oluşan güç kaybına göre daha azdır, bu da haliyle yakıt ekonomisi demek. ama eğer arkadan çeker baz alınarak tasarlanmış bir awd sistemiyse o zaman arka tekerleklere gönderdiği zaman güç kaybı daha az olur.
2 çeker arabalarda da önden çekiş her zaman daha yüksek verimlilik anlamına gelmez. yani önden çeker bir arabayı verimli ve düşük maliyetli yapan şey önden çeker olması değil motorla motor gücünün gönderildiği tekerleklerin aynı yerde olması ve bu sebeple şanzımandan tekerlere gücü aktarmak için normal diferansiyel yerine daha pratik ucuz parçalar kullanılması. tam anlatabildim mi bilmiyorum ama mesela bazı önden çeker arabalarda motor kaputa enlemesine değil uzunlamasına yerleştirilmiştir ve ön tekerlere bizim bildiğimiz piyasadaki arabalarda gücü aktaran transaxle denen parçayla değil de normal arkadan itiş tarzı açık diferansiyelle bağlıdır, o tarz arabalar önden çeker olduğu halde daha verimli değildir mesela
I was under the impression Land Rovers avoided wheelslip by being heavy, so that the wrecker towing it home from yet another mechanical doesn't spin its wheels in slippery conditions. ;-)
So when talking about the AWD being in 2WD most of the time, you showed a Subaru...the only vehicle that is AWD all of the time because of the way that the platforms and drive trains are designed. Symmetrical AWD sends equal power to all four wheels all of the time except when conditions and traction warrant different responses. Also, neither AWD nor 4WD add any level of safety when there is snow or ice on the ground except for when you are moving in a straight line. They do not help you turn or stop. The only real difference between AWD and 4WD is that 4WD uses a large heavy transfer case. Other than that, there aren’t many differences between a modern 4WD and modern AWD. Most modern 4WD systems are shift on the fly these days and contain an “AWD” setting. A lot of them don’t even have a separate “stick” but rather a dial/switch...GM vehicles have been using that system since the 2002 Tahoe and Trailblazer. There are a bunch of AWD systems that contain a 4HI/ 4WD lock settings. You see that in Fords, Toyota’s, Nissan’s, and more. Jeep AWD systems often have a simulated low range ratio on their AWD systems too despite not having a transfer case. Honestly, the only real difference between the two is the type of vehicles that they are put into; vehicles like off-roaders, pickups, and full size SUVs. These vehicles need higher ground clearance, more robust gear, and higher at-wheel torque. AWD is a more compact system that goes into vehicles that people use every day to commute in, run errands, etc.
There was a mistake. I bought an AWD because it handled better in the normal condition with FWD. 4WD is fine but had lots of limitation: Normally RWD, and there is a speed limit in 4WD. I wished they could make a FWD part time 4WD.
Well....it depends. I saw a Subaru trying to do Engineer pass in Colorado and while it technically 'made it' it sure was a mess when it finally reached the end...haha...the rockers were dented beyond belief, it probably broke every piece of plastic (and there is a LOT of plastic on those) and just wasn't the same as it started the journey.
There are many different kinds of off-road. Crawlers might be great over rocks, but they're not going to pull off trophy truck whoops in the desert. That said, you're correct about deep mud. I've never seen a Subaru with a lift kit. The drive train couldn't handle it.
Wrong, simply wrong. A subaru with a lift crushes swamps. Spend some time researching before you lead the blind. This URL will be a good start, it's mostly pictures so you won't need to struggle much reading, granted your lack of grammar I can't imagine your reading is much better. forums.nasioc.com/forums/showthread.php?t=1228188
The kind of lift kit I'm talking about is for trucks. It lifts the body off the frame. Putting tall shocks on a unibody car isn't the same thing. Raised the ride height, but didn't actually lift the body higher off the suspension/chassis. You're not going to see a Subaru bogging in waist height water and mud for very long. I've seen videos of older Subies with a snorkel doing river crossings and they nearly get washed away in the process. You CAN do a lot in a Subaru (I loved my 05 STI and 13 BRZ), but a 4x4 truck is a better choice for serious off-road, mostly due to the ground clearance and body-on-frame durability. That said, nothing really compares to hooning an STI or Evo on dirt and gravel. I had fun every time I drove my STI. Should have kept it as a project car.
Great examples. Say I am in snow in my Subaru and kinda stuck and one of my wheels is a bit freer then the others, will it spin while the others don't?
Depends on your vehicle. Some might have a limited slip differential where it will use one of many methods of adding resistance to the spinning tire to give more torque to the tires which are more stuck. In most AWD cars I'm aware of (made before 2013 and it seems like things are changing) they have 3 open differentials so the tire with the least resistance determines how much torque the rest of the tires get. Newer traction control systems will apply brakes to that tire to reduce the spinning to give more power to the remaining tires. Maybe in the next 4-6 years AWD will truly be comparable to 4x4 if not better.
Theres something called VDC(vehicle dynamic control) that Subaru uses on its models. Every model (im sure about the forester the outback and the xv) produced from 2006 up to now has this feature. Basicaly its a system that searches the wheels with traction and sends power to them. However if ur subie doesnt have X-mode u have to step on the gas for a little longer giving the system a chance of finding grip.
Wrong-o. AWD is not on all the time. The cars computer and sensors will send power to only one wheel at a time. If that wheel slips it sends power to another. And Richard Bonnell is correct about FWD.
It may differ between countries, but from what i know, there's no common sense on those nomenclatures. I've heard the difference between 4x4 and 4WD(or AWD). My 4WD when turned off, only powers the front wheels. Then theres an Auto mode, whit electronic control, and a Lock Mode. It's a Renault Duster. The sistem you described as 4WD on the video, here is known as 4x4.
4WD shoul be called ORD Off-Road Drive, i think that suits it perfectly. I thought about A4WD but ORD is better. However we may open a new can of worms altogether - why is an ORD car on the road? lol
Misleading video. Four-wheel-drive does not drive all four wheels at the same time. It drives the front and rear driveshaft at the same speed which delivers power equally to the front and rear differentials which usually supply power to one wheel located on that differential not two wheels. In a standard jeep liberty for example, if you put the vehicle on an icy incline where one side was on ice and the other was on dry pavement and it was in four-wheel-drive, the side where the wheels are on ice would spin and the side where the wheels were on pavement would not get any power at all. This is known as having open differentials.
You are wrong about Range Rover that you say that if u want to go activate 4x4 you need to push a gear or buton. the rr system in the moment that his system suspect danger or slepery the system activate by himself so its not all time 2 hi in diferent condition it goes 4 hi atomaticlly. on range rover you allso have terrein responde system that gives you more traction for offroad. that explain was for Range rover not for land rover defender that is with diferent
Thanks, finally a video which makes me understand the difference. After checking already 3 other videos..
good explanation, however, most AWD systems send power to the front, not the rear, when not being used.
Yeah Richard, it's true most cars/crossovers/SUV's (not all) are front wheel bias.
My INFINITI QX50 is rear wheel bias.
I think INFINITI does this because they are more performance oriented.
Usually sends more power to the front anyways. 60/40 70/30 80/20 etc
The animation where it shifts is wrong. It shows only the rear wheels engaged while it's on "4H" (4 High) which is already 4WD/AWD. Then it shifts to 4L (4 Low) which is pretty much the same like 4H but with a different gear ratio - a lower one, hence the name.
How about AWD with a diff lock ability like the KIA Sorento? Does the AWD become a 4WD?
no
The difference in offroading has more to do with the ground clearance of the particular vehicle, as most AWD's are actually cars.. I have a subaru_ outback, and it is a hell of an offroader ( for a car ) ! Had it more ground clearance it would have no problem with hard_core offroarding... ( if a diff. lock is built in ,that is )
There is full time 4WD and part time 4WD. I think AWD means the same as 4WD.
It's Only Me no AWD is not the same as 4WD
space1188 He explains it in the video
Outstanding! Thank you for educating my mind!
This was complicated and also depends on the vehicle
I can't understand the power management of this
Advertisement for "All Wheel Drive" old 4x4 systems are NOT complicated. In fact they don't get more simple.
I guess you forgot about the 4runner. You can certainly take it over boulders and highways.
1:40 what?why does it send power to rear wheels if on highway or something?
fuel economy is best on FWD cars not RWD... and in the case of AWD sending power to just the rear gets better MPG? is that what im hearing?
i dont think so.
Super late response but FWD fuel economy is generally better than RWD fuel economy mostly because FWD cars don't have to waste a lot of weight sending power all the way to the rear of the car. When the car is already set up to do that, sending to front or rear doesn't have any benefits cause the weight is the same. Sending to the rear DOES have performance improvements though like mitigating under-steer and having better power during acceleration.
I'm really confused!.. You claim that "the system sends most of the engine power to the rear wheels for maximum fuel efficiency" but transferring the power to rear wheels instead of front wheels is unefficient in terms of fuel efficiency due to mechanical frictions while transferring the power via axles! isn't it?
Yeah I think this part is wrong, I have an automatic Subaru and I'm sure I've heard that most of the power is kept at the front wheels, unless you lose traction and it can do half half
Vw states 90 percent goes to the front. Subaru’s crosstreck sends 70 percent to the front most of the time. Audi and other sports cars send more power to the rear wheels for handling
it send power to rear wheel when descending hills etc
maximum fuel efficiency derken awdye kıyasla söylüyor, dört tekerleğe göndermektense arkaya göndermek daha az benzin yaktırır. öne göndermek her zaman az yaktırmaz awd tasarımına göre değişir. bazı awd sistemler gücün tamamını sürücü istese de ön tarafa aktaramaz çünkü arkadan çekiş baz alınarak tasarlanmıştır. bazıları da tam tersi arkalara gücün tamamını gönderemez çünkü arabada arka tekerleklere giden tüm motor gücünü kaldırabilecek bir diferansiyel yoktur. yani eğer awd sistemi önden çeker baz alınarak tasarlanmışsa öne gönderince daha az yakar çünkü önlere gönderince ortaya çıkan güç kaybı arkaya gönderince oluşan güç kaybına göre daha azdır, bu da haliyle yakıt ekonomisi demek. ama eğer arkadan çeker baz alınarak tasarlanmış bir awd sistemiyse o zaman arka tekerleklere gönderdiği zaman güç kaybı daha az olur.
2 çeker arabalarda da önden çekiş her zaman daha yüksek verimlilik anlamına gelmez. yani önden çeker bir arabayı verimli ve düşük maliyetli yapan şey önden çeker olması değil motorla motor gücünün gönderildiği tekerleklerin aynı yerde olması ve bu sebeple şanzımandan tekerlere gücü aktarmak için normal diferansiyel yerine daha pratik ucuz parçalar kullanılması. tam anlatabildim mi bilmiyorum ama mesela bazı önden çeker arabalarda motor kaputa enlemesine değil uzunlamasına yerleştirilmiştir ve ön tekerlere bizim bildiğimiz piyasadaki arabalarda gücü aktaran transaxle denen parçayla değil de normal arkadan itiş tarzı açık diferansiyelle bağlıdır, o tarz arabalar önden çeker olduğu halde daha verimli değildir mesela
Thanks so much...
Trevor, for a quick study, this is a great vid. A couple points not 100% right, doesn't matter. Good job.
Wow so much wrong in this video its almost funny. First, why not go and look up the 4wd system that most Land Rover's use and have done since 1970.
300bhpton agreed, since the front is usually heavier thus providing more traction and less fuel consumption compared to rear
I was under the impression Land Rovers avoided wheelslip by being heavy, so that the wrecker towing it home from yet another mechanical doesn't spin its wheels in slippery conditions. ;-)
SH-awd?
So when talking about the AWD being in 2WD most of the time, you showed a Subaru...the only vehicle that is AWD all of the time because of the way that the platforms and drive trains are designed. Symmetrical AWD sends equal power to all four wheels all of the time except when conditions and traction warrant different responses. Also, neither AWD nor 4WD add any level of safety when there is snow or ice on the ground except for when you are moving in a straight line. They do not help you turn or stop.
The only real difference between AWD and 4WD is that 4WD uses a large heavy transfer case. Other than that, there aren’t many differences between a modern 4WD and modern AWD. Most modern 4WD systems are shift on the fly these days and contain an “AWD” setting. A lot of them don’t even have a separate “stick” but rather a dial/switch...GM vehicles have been using that system since the 2002 Tahoe and Trailblazer. There are a bunch of AWD systems that contain a 4HI/ 4WD lock settings. You see that in Fords, Toyota’s, Nissan’s, and more. Jeep AWD systems often have a simulated low range ratio on their AWD systems too despite not having a transfer case.
Honestly, the only real difference between the two is the type of vehicles that they are put into; vehicles like off-roaders, pickups, and full size SUVs. These vehicles need higher ground clearance, more robust gear, and higher at-wheel torque. AWD is a more compact system that goes into vehicles that people use every day to commute in, run errands, etc.
There was a mistake. I bought an AWD because it handled better in the normal condition with FWD. 4WD is fine but had lots of limitation: Normally RWD, and there is a speed limit in 4WD. I wished they could make a FWD part time 4WD.
Question for the experts : Can you still drive a 2011 Volvo XC90 without the centre drive shaft installed ?
Nope. It will just send all the power to the missing link
subarus are known as a great off road cars :) So it is not just a 4wd territory
Well....it depends. I saw a Subaru trying to do Engineer pass in Colorado and while it technically 'made it' it sure was a mess when it finally reached the end...haha...the rockers were dented beyond belief, it probably broke every piece of plastic (and there is a LOT of plastic on those) and just wasn't the same as it started the journey.
ealiev60 no subarus are good rally not offroad try taking your subaru up a swamp
There are many different kinds of off-road. Crawlers might be great over rocks, but they're not going to pull off trophy truck whoops in the desert. That said, you're correct about deep mud. I've never seen a Subaru with a lift kit. The drive train couldn't handle it.
Wrong, simply wrong. A subaru with a lift crushes swamps. Spend some time researching before you lead the blind. This URL will be a good start, it's mostly pictures so you won't need to struggle much reading, granted your lack of grammar I can't imagine your reading is much better. forums.nasioc.com/forums/showthread.php?t=1228188
The kind of lift kit I'm talking about is for trucks. It lifts the body off the frame. Putting tall shocks on a unibody car isn't the same thing. Raised the ride height, but didn't actually lift the body higher off the suspension/chassis.
You're not going to see a Subaru bogging in waist height water and mud for very long. I've seen videos of older Subies with a snorkel doing river crossings and they nearly get washed away in the process. You CAN do a lot in a Subaru (I loved my 05 STI and 13 BRZ), but a 4x4 truck is a better choice for serious off-road, mostly due to the ground clearance and body-on-frame durability. That said, nothing really compares to hooning an STI or Evo on dirt and gravel. I had fun every time I drove my STI. Should have kept it as a project car.
Great examples. Say I am in snow in my Subaru and kinda stuck and one of my wheels is a bit freer then the others, will it spin while the others don't?
Depends on your vehicle. Some might have a limited slip differential where it will use one of many methods of adding resistance to the spinning tire to give more torque to the tires which are more stuck. In most AWD cars I'm aware of (made before 2013 and it seems like things are changing) they have 3 open differentials so the tire with the least resistance determines how much torque the rest of the tires get. Newer traction control systems will apply brakes to that tire to reduce the spinning to give more power to the remaining tires. Maybe in the next 4-6 years AWD will truly be comparable to 4x4 if not better.
Paul Hawkins 🇦🇴
Theres something called VDC(vehicle dynamic control) that Subaru uses on its models. Every model (im sure about the forester the outback and the xv) produced from 2006 up to now has this feature.
Basicaly its a system that searches the wheels with traction and sends power to them.
However if ur subie doesnt have X-mode u have to step on the gas for a little longer giving the system a chance of finding grip.
The subie will apply brakes to a spinning wheel for the differential to send power to the non-slipping wheel
what if AWD has Lockers or Torsen ?
Well explained. Thanks
You've been conned. There are 3-wheel and 6-wheel vehicles and awd covers all.
got very good info
Don't know what your talking about. . 4x4 is selectable whilst Awd is permanent. Doesn't mean one system is better than the other.
I still haven't understand why 4wd is better than awd on off road.
On a track awd is more on front axle...
This makes sense to me
😊 really good video
In short 4WD is traditional system and AWD is smart system 😂😂😂
Yes, but if you are smart you also understand 4wd for off road and awd for slippy roads
So many things wrong with this video, don't even know where to begin.
Yeah., was like 0_o
lol so wrong mercedes g-class, land cruser79 is AWD and is still god off-roaders
they use an awd system with locking differentials not 4wd. this video is wrong in quite many ways
Wrong-o. AWD is not on all the time. The cars computer and sensors will send power to only one wheel at a time. If that wheel slips it sends power to another. And Richard Bonnell is correct about FWD.
It may differ between countries, but from what i know, there's no common sense on those nomenclatures.
I've heard the difference between 4x4 and 4WD(or AWD).
My 4WD when turned off, only powers the front wheels. Then theres an Auto mode, whit electronic control, and a Lock Mode. It's a Renault Duster.
The sistem you described as 4WD on the video, here is known as 4x4.
pretty much what i thought.
but just to make sure
4WD shoul be called ORD
Off-Road Drive, i think that suits it perfectly. I thought about A4WD but ORD is better.
However we may open a new can of worms altogether - why is an ORD car on the road? lol
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I don't care if you have all wheel drive or 4 wheel drive ice always beat those two
I agree. Common sense beats ice, though. Sadly, there isn't enough of it on the roads.
God of destruction غ2fgg
AWD has the power split up from the transmission. 4wd has the power split up through a transfer case. And you people are supposed to be car experts?
Land/Range Rover are AWD. A lot of mistakes in this video.
you havent seen extreme conditions
Actually 4wd only gives power to right side wheels unless you have a posi
Misleading video. Four-wheel-drive does not drive all four wheels at the same time. It drives the front and rear driveshaft at the same speed which delivers power equally to the front and rear differentials which usually supply power to one wheel located on that differential not two wheels. In a standard jeep liberty for example, if you put the vehicle on an icy incline where one side was on ice and the other was on dry pavement and it was in four-wheel-drive, the side where the wheels are on ice would spin and the side where the wheels were on pavement would not get any power at all. This is known as having open differentials.
Yes, "4WD" is really just 2WD if you have open diffs, and F/RWD is just 1WD with open diffs...
You are wrong about Range Rover that you say that if u want to go activate 4x4 you need to push a gear or buton. the rr system in the moment that his system suspect danger or slepery the system activate by himself so its not all time 2 hi in diferent condition it goes 4 hi atomaticlly. on range rover you allso have terrein responde system that gives you more traction for offroad. that explain was for Range rover not for land rover defender that is with diferent
how the system cuts power when needed i cant understand pls explaine
I't will depend on the car system. May be eletronic controlled "diff clutch", or a eletronic brake on the spinnig wheel.
subaru and audi are not built as tough jeeps,chasis is low and lack of off road suspention.
AWD=Subaru
Look for another video, this info is very wrong
So what you're saying is that a 2006 Cadillac Escalade AWD can go off-road. And a 4x4 2009 Ford Explorer.
Where did you see him saying anything closer to that?
4wd no.........part time vs awd ok???
Land Rovers use all wheel drive
awda
AWD 4Life
so much wrong in 2 mins
Dangerously mis-leading video. Throw your vehicle into 4 wheel drive on high traction road and say ta ta to your transfer box.
not if you drive dead straight on a zero camber Road :) :) :)
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