10 minutes is all it took for you to make that clear? Really awesome job, man! I was a bit afraid of that diagram before watching the video, but you really did a good job explaining the whole thing. Thanks!
The lower gear set is for high torque low wheel speed. The high gear selector (which your car is usually in) can't gear down this low, even in 1st/2nd. Now you could use second gear high for something like going down a mountain where you don't want to overheat your brakes.
It of course, depends on the application. Open is fine for everyday cars. An LSD is beneficial in many applications such as racing, or even towing. Locked diffs are great off road, but terrible on the road.
If it's a setup with 2WD and 4 wheel drive, using a transfer case, there wouldn't be a center diff. Center diffs are used in AWD vehicles to balance the power/speed distribution from front to back, rather than a "locked" set-up as shown in this video.
Actually in my next video I'll be discussing viscous couplings as part of it. Pair a viscous coupling with an open diff, and you've got a basic viscous limited slip differential.
It could be incorporated into the transmission. Not entirely sure for the reasoning, but if it's not, it allows you to use the same transmission across multiple platforms, making the transmission more versatile rather than for just 4WD vehicles.
I was not having a single idea of how a transfer case works. Infact i didnt know what is it for. But in 10 mins you made me understand working of every single part of a transfer case. Great Job! Thank you!
Excellent video! Was trying to wrap my head around my Jeep's transfer case and 10mins later I got a pretty good understanding of how it works. Love it when that happens!
They will spin at the same rate, though if you wanted to make things complicated you could use a different gear ratio diff at the front to make up for a different gear ratio in the transfer case. Probably not the easiest solution though, 1:1 should be used in the transfer case. The model in the top left isn't the most accurate drawing. :)
The first time I couldn't follow a thing. I paused for a while, watched the sketch u drew. And the second time I saw the video it all made sense.... thanks alot for the video.....couldnt ask for for a better tutor
Your videos are very informative and nicely explained with the white board! It's a nice learning tool for beginners or even a refresher for those familiar with the systems. Great work!
"Now this diagram might look a bit tricky at first..." I laughed out loud at that. Edit: Just finished the video and I have to say you did a great job explaining it. Well done.
great video mate. Im a first yr apprentice mechanic, and this has made the transfer box very easy to understand. I'll keep following your vids. from Simon, Western Australia.
Tell me about it. If there was a better way I would try to do it. But it doesn't seem time effective to make 3D models, and I won't use copyright images so that makes it a little difficult. My girlfriend hasn't watched a single one of my videos all the way through, she also becomes quite bored. How supportive, right? Oh well, I try to explain a lot of it to her anyways.
Engineering explained. Binge watching. Your videos and explanations are outstanding in every way. You have a gift to get the viewer excited about your presentations. Are you an engineer...or a salesman? You always make your points. Your college professors must be proud...and of course you should be proud of yourself for applying yourself in a very exceptional way. Awesome job...Thank you.
Holy crap. I'm so glad I found the right Google keywords to take me to this channel. This is so helpful already, and your other videos look great for what I'm trying to learn about for this project I'm working on! Thanks for the great material!
It seriously concerns me that i grasped this in one try whereas i had to watch camber and toe-in/out twice for me to click. I know this was uploaded a long time ago but i want to say that i found your channel last night and have powered through all your uploads up to this point; you're great at explaining all the technologies i've previously assumed to be rocket science ^_^ Thanks a bunch
Pause 2:01 if you don't know what a drive shaft is look for a video explaining... Great video man. Just as a heads up you can drive a 4wd vehicle with no trans fluid in the transfer case. It just won't go in to 4wd or on an AWD vehicle it won't engage the front wheels when they slip.. please continue.
Thanks I actually just ordered the automotive technology which I am using for my shop class..but I am interested in learning beyond on that and I might just get those books you recommended. Thank you very much, oh and thanks for the very good explanations you give it really helps. Keep it up, I'll be watching more.
I’ve been thinking about something. Would it be possible to have a FWD, RWD, and 4x4 transfer case on pickup trucks? FWD would be great for driving in rain and snow without weight in the bed, but you still need the RWD for towing, and 4x4 would still be wanted by most. With the geometry of the transfer case, would it be possible to have all 3 of these drive types?
Can you safely tow a 4WD on all 4 wheels by just disconnecting the drive shaft? Will the transmission still spin if the cv axles are still attached? Or would you have to also disconnect the front cv axles?
Your drawings and how you explain the whole process makes it so easy to understand. Thanks for uploading so many helpful videos. I check your channel before I try read how something works as its much easier to learn here (:
I've been watching your videos for some time , you are doing a really good job explaining different systems in Automobiles I just have one question : How about the red gear ( that is connected to the front shaft ), Does it rotate on bearing, while the 2WD is activated ? Am really thankful for your hard work keep it up..
This video was great! Finally getting an understanding of vehicles, and I stumbled across this video and a few very informational sites on the concepts of drive trains, and I feel that I learned so much more from this video, coupled with the transfer case model video, than I did in the reading I just did!
FANTASTIC videos! Just bought 1st 4x4 (01 Silverado) and your videos have really helped me understand how they work. Very clear, easy to understand. Keep up the great work! I am curious - PT 4x4 - Is the transfer case "engaged" when driving in 2wd? If the chain in the case were to break/snap, I understand they stretch/wear over time and use, would I be walking? It seems that when in 2wd, power simply passes through the case to the rear. Not that simple? I appreciate your input.
Thanks for your response. Reasons for my question, is that my 4x4 has an open differential at the rear, and going offroading is a bit of a pain, so i was wondering to replace the rear diff with an LSD or E-LSD.
Planetary Gear sets are used quite often. The draw back is that the power is not divided equally, just based purely on the nature of planetary gear sets!
firstly thanks for thevideo as it happened before. each and every thimg becomes clear and one more thing mate, i may be wrong but i guess there is a small mistake in your diagram. in 3 section the blue coupling may be connected to the green shaft and allow to enable to wheel drive and when we shift it , it will connect both ie front and rear axle
yeah thanks man, thats why i was wondering since the wheels obviously have to spin at the same (or maybe similar with a differential..) and i was wondering what happens there since i haven't myself had an opportunity to see the inside of one. figured it would then have to be 1:1. well thanks man, looking forward to the next video!
on 8:35 you said that this green shaft between chain and this closest red gear on right side doesnt rotate when you use fwd? how then torque from the engine transfers to fwd?
Hi, I've got an AWD 1997 Chevy Astro. I'm pretty sure one of the front axles broke, so now I'm driving in 2wd RWD. My question has to do with something my mechanic said. It was my understanding that if there were a broken axle, or any other reason one wheel was not touching the ground, all of the torque would go to that wheel/axle, escaping through the path of least resistance. So, I figured that since I was able to still drive, that my transfer case must be working, locking up to ensure that torque goes to the rear axle. My mechanic is saying that the transfer case might be the entire problem, and that if the viscous coupler were to stop working, power would go to the rear axle, but be unable to transfer power to the front axle. Do you know which it is on my vehicle? Does this transfer case always give power to the rear axle and only give power to the front axle when slip occurs, or is it more like a standard differential, where it sends power in both directions all the time, but locks up when power try's to escape one direction or an other? Does my question make sense?
10 years later and I still hit up EE for things l run into at work. What a legend. Started out great and got even better
10 minutes is all it took for you to make that clear? Really awesome job, man! I was a bit afraid of that diagram before watching the video, but you really did a good job explaining the whole thing. Thanks!
Thoughts exactly he did pretty good!
a trick : watch movies at Flixzone. Been using it for watching a lot of movies recently.
@Luke Isaac yup, have been watching on Flixzone for since december myself :)
The high/low is for all wheels. It's essentially like using a lower gear in the transmission.
The lower gear set is for high torque low wheel speed. The high gear selector (which your car is usually in) can't gear down this low, even in 1st/2nd. Now you could use second gear high for something like going down a mountain where you don't want to overheat your brakes.
you make every concept so simple, thank you so much dude, i speak for every one when i express my appreciation.
You're welcome, thanks for watching!
I was just thinking the same thing
@@EngineeringExplained mmmqkqaakk1qkqkak!)
It of course, depends on the application. Open is fine for everyday cars. An LSD is beneficial in many applications such as racing, or even towing. Locked diffs are great off road, but terrible on the road.
If it's a setup with 2WD and 4 wheel drive, using a transfer case, there wouldn't be a center diff. Center diffs are used in AWD vehicles to balance the power/speed distribution from front to back, rather than a "locked" set-up as shown in this video.
Actually in my next video I'll be discussing viscous couplings as part of it. Pair a viscous coupling with an open diff, and you've got a basic viscous limited slip differential.
It could be incorporated into the transmission. Not entirely sure for the reasoning, but if it's not, it allows you to use the same transmission across multiple platforms, making the transmission more versatile rather than for just 4WD vehicles.
There's a selector for it. Yes, you can be in drive (D) in low gear (L), or in second (2) and low gear (L).
I was not having a single idea of how a transfer case works. Infact i didnt know what is it for. But in 10 mins you made me understand working of every single part of a transfer case.
Great Job! Thank you!
I may have forgotten to include it as an annotation. Check the video description, it's the second link I listed.
I used one called shigley's mechanical engineering design. It's great for the design of things, such as chains, clutches, flywheels, etc..
Interesting, glad you enjoyed the video!
Yes, some do the opposite. I know the Golf R disconnects the rear axle on highways (completely different system, but you get the idea).
Excellent video! Was trying to wrap my head around my Jeep's transfer case and 10mins later I got a pretty good understanding of how it works. Love it when that happens!
You never cease to amaze me with how simple you can make a difficult subject do that anyone can understand it. Cheers to you and thanks!
When I first started watching your clip i thought the picture was a mess but you teaching method was thorough and concise... Great job.
They will spin at the same rate, though if you wanted to make things complicated you could use a different gear ratio diff at the front to make up for a different gear ratio in the transfer case. Probably not the easiest solution though, 1:1 should be used in the transfer case. The model in the top left isn't the most accurate drawing. :)
The first time I couldn't follow a thing. I paused for a while, watched the sketch u drew. And the second time I saw the video it all made sense.... thanks alot for the video.....couldnt ask for for a better tutor
Thanks for taking the time to make these videos.
You do a great job of simplifying and explaining each part/process.
Man your explanations really clarify things. Great job. Makes me wish I'd been an engineer.
Your videos are very informative and nicely explained with the white board! It's a nice learning tool for beginners or even a refresher for those familiar with the systems. Great work!
"Now this diagram might look a bit tricky at first..." I laughed out loud at that.
Edit: Just finished the video and I have to say you did a great job explaining it. Well done.
really good job explaining this. I have tried to explain this to my kids and NEVER could....you did it.
Thanks David!
great video mate. Im a first yr apprentice mechanic, and this has made the transfer box very easy to understand. I'll keep following your vids. from Simon, Western Australia.
Both, but your option could be limited to high/low rather than both high/low and 2wd/4wd.
Thanks, glad you liked it.
Just like in manual transmission, synchronizers can be used. I should make a video on these.
I was very impressed one so young knew so much about this. Kudos to those who go into trades like mechanics.
Tell me about it. If there was a better way I would try to do it. But it doesn't seem time effective to make 3D models, and I won't use copyright images so that makes it a little difficult. My girlfriend hasn't watched a single one of my videos all the way through, she also becomes quite bored. How supportive, right? Oh well, I try to explain a lot of it to her anyways.
Thanks! If the video was continuous, then yes, one take. If there are new scenes that's typically where I mess up. Cheers!
Engineering explained. Binge watching. Your videos and explanations are outstanding in every way. You have a gift to get the viewer excited about your presentations. Are you an engineer...or a salesman? You always make your points. Your college professors must be proud...and of course you should be proud of yourself for applying yourself in a very exceptional way.
Awesome job...Thank you.
This is phenomenal, not many people can explain so clearly
Holy crap. I'm so glad I found the right Google keywords to take me to this channel. This is so helpful already, and your other videos look great for what I'm trying to learn about for this project I'm working on! Thanks for the great material!
It seriously concerns me that i grasped this in one try whereas i had to watch camber and toe-in/out twice for me to click.
I know this was uploaded a long time ago but i want to say that i found your channel last night and have powered through all your uploads up to this point; you're great at explaining all the technologies i've previously assumed to be rocket science ^_^ Thanks a bunch
That's as good an explanation as I have ever heard. Thank you and PLEASE keep posting new vids!
You've done a really good job of explaining this, thanks man.
Thank you for posting this video my friend. Great explanation , couldn't ask for better ! Great clear drawing chart as well. Stay safe
Watched this video and you explained things so simply...I was so impressed I'm now working through your backlog of tutorials....Cheers
Wow! Thank you for taking the time to make this vid and explain things in a clear and concise manner. It is well done! much appreciation!
I have been looking for just this information. Thank you and I will be checking out your other videos in the series.
great job dude. did you do the explaination in one take? that is amazing man. keep it up, loving it.
Pause 2:01 if you don't know what a drive shaft is look for a video explaining... Great video man. Just as a heads up you can drive a 4wd vehicle with no trans fluid in the transfer case. It just won't go in to 4wd or on an AWD vehicle it won't engage the front wheels when they slip.. please continue.
Dude you are so good at explaining things, thank you
This is perfectly useful for helping me with my transfer case assignment, thanks for uploading.
Great series of videos on four wheel drive. They have really helped me understand the basic mechanics.
Method to my madness, haha, glad it was clear!
Thanks I actually just ordered the automotive technology which I am using for my shop class..but I am interested in learning beyond on that and I might just get those books you recommended. Thank you very much, oh and thanks for the very good explanations you give it really helps. Keep it up, I'll be watching more.
I’ve been thinking about something. Would it be possible to have a FWD, RWD, and 4x4 transfer case on pickup trucks? FWD would be great for driving in rain and snow without weight in the bed, but you still need the RWD for towing, and 4x4 would still be wanted by most. With the geometry of the transfer case, would it be possible to have all 3 of these drive types?
ur all videos are awesome.. helped me out during my exams.. Thank You
Hmm, so it doesn't work anymore? Sounds like transfer case as the transmission would likely stay in the same gear.
well done video, the visual model really helped understanding the collars and the purpose they serve.
Not Simple But Crystal Clear !
Many Thanks !
Yes, in 2WD power simply passes through to the rear. You could make it home, thankfully someone thought it out haha
Can you safely tow a 4WD on all 4 wheels by just disconnecting the drive shaft? Will the transmission still spin if the cv axles are still attached? Or would you have to also disconnect the front cv axles?
I know ur diagram is simplified but it is very clear how it works w your explanation. Reminds me of a motorcycle gearbox. Cool!
Your drawings and how you explain the whole process makes it so easy to understand. Thanks for uploading so many helpful videos. I check your channel before I try read how something works as its much easier to learn here (:
Nice easy way to get an understanding of how it works. Thanks
summer break is that why your making so many decent videos
Really good videos, mate! It is a very informative and the use of colours really ensures it stands out to the ones like me, haha.
Thanks for watching!
I've been watching your videos for some time , you are doing a really good job explaining different systems in Automobiles
I just have one question : How about the red gear ( that is connected to the front shaft ), Does it rotate on bearing, while the 2WD is activated ?
Am really thankful for your hard work
keep it up..
Glad you enjoy the videos! Yes, the red gear would rotate on bearings, as would the other shafts as well to minimize friction.
you taught me more than my professor!! well done!
This video was great! Finally getting an understanding of vehicles, and I stumbled across this video and a few very informational sites on the concepts of drive trains, and I feel that I learned so much more from this video, coupled with the transfer case model video, than I did in the reading I just did!
Not sure of the exact numbers but yeah that could work.
Thanks man, I've watched almost all your video.
Thank you Sir...
This video help me a lot in understanding the Concept of 4 Wheel Drive
Excellent explanation. Thank you.
Great to hear, thanks Matt!
Your videos are extremely helpful and clear. Can you please post something about the coil and the encoder, how they work in the transfer case?
Very nicely explained with a great diagram! Got the answers to all my doubts! Thanks!
thank you for this video. it helped to explain how a 4:1 transfer case works
FANTASTIC videos! Just bought 1st 4x4 (01 Silverado) and your videos have really helped me understand how they work. Very clear, easy to understand. Keep up the great work!
I am curious - PT 4x4 - Is the transfer case "engaged" when driving in 2wd? If the chain in the case were to break/snap, I understand they stretch/wear over time and use, would I be walking? It seems that when in 2wd, power simply passes through the case to the rear. Not that simple?
I appreciate your input.
Damn. That was a great explanation. What ingenious engineering
Thanks for your response. Reasons for my question, is that my 4x4 has an open differential at the rear, and going offroading is a bit of a pain, so i was wondering to replace the rear diff with an LSD or E-LSD.
Don't know, you could probably check the manual or have a quick google search.
Excellent video. Nice diagram. Great explaination.
Awesome video mate. Well done. Very well explained
Amazing video. Great explanation.
That was great! You made that super easy to understand!!
I love your videos. You explain everything really well
Yeah my picture wasn't too great. Should be more of a 1:1 ratio.
what are the 1:1 gear ratios? The 3 gears used used in 4low?
Planetary Gear sets are used quite often. The draw back is that the power is not divided equally, just based purely on the nature of planetary gear sets!
You're welcome!
Thanks! This video is very well done!
Makes perfect sense, great job on explaining.
Everything you said makes sense! Thanks for the video.
firstly thanks for thevideo
as it happened before. each and every thimg becomes clear
and one more thing mate, i may be wrong but i guess there is a small mistake in your diagram. in 3 section the blue coupling may be connected to the green shaft and allow to enable to wheel drive and when we shift it , it will connect both ie front and rear axle
my lada niva has an AWD transfercase. i guess it has a lockable differential instead of the chain connection in your video
Good job ... might want to use the term "coupler" in place of "gear" on shaft that engages four wheel drive.
yeah thanks man, thats why i was wondering since the wheels obviously have to spin at the same (or maybe similar with a differential..) and i was wondering what happens there since i haven't myself had an opportunity to see the inside of one. figured it would then have to be 1:1. well thanks man, looking forward to the next video!
Thank you for this! So clear and easy to follow.
Thank you,your an excellent teacher
on 8:35 you said that this green shaft between chain and this closest red gear on right side doesnt rotate when you use fwd? how then torque from the engine transfers to fwd?
Logical... easy to follow.
That's just great explaining...
So cute to see your roots
Care to elaborate?
Thumbs up for finding examples in the scrap yard
Hi, I've got an AWD 1997 Chevy Astro. I'm pretty sure one of the front axles broke, so now I'm driving in 2wd RWD. My question has to do with something my mechanic said. It was my understanding that if there were a broken axle, or any other reason one wheel was not touching the ground, all of the torque would go to that wheel/axle, escaping through the path of least resistance. So, I figured that since I was able to still drive, that my transfer case must be working, locking up to ensure that torque goes to the rear axle. My mechanic is saying that the transfer case might be the entire problem, and that if the viscous coupler were to stop working, power would go to the rear axle, but be unable to transfer power to the front axle. Do you know which it is on my vehicle? Does this transfer case always give power to the rear axle and only give power to the front axle when slip occurs, or is it more like a standard differential, where it sends power in both directions all the time, but locks up when power try's to escape one direction or an other? Does my question make sense?