I clicked when I saw “Bleepinjeep” I knew the difference on full and semi float.... but your video on gear ratio certainly was impressive just like this video..... your videos are educational, you are an asset to DIYers and TH-cam well done! My humble request cut the intro, it’s too long, loud (people listening to tutorials tend to keep volume up sometimes), and for some viewers who are new to you might not even watch. My 2 cents! Great videos! Cheers!
One thing many here will already know, but might be useful to others, is that in most modern semi-floating axles, the shafts are retained via C-clips to the side gears of the differential, not by a bearing cap at the end of the housing combined with a pressed-on sleeve that keeps the wheel bearing from sliding inward, as was common years ago (and as shown on your semi-floating example here).
thanks for the explanation on full floating. However your description un unsprung weight was actually describing rotational mass. Unsprung weight is everything connected to the body via the suspension, the more unsprung weight you have the less responsive it will become, its more important for high speed traction!
I saw a half ton pickup on the side of the road a few weeks ago. Resting on its rear bumper with a bumper pull toy hauler behind it. I imagine that guy could have benefited from watching this. Good explanation sir.
I had a ford 9 inch break on me with a camper and trailer on the truck. We were going camping and we were 30 miles from the nearest phone. Needless to say, that sucked. It could have been a little better if the entire wheel hadn't come flying off. Luckily we were on flat straight road and not the switchbacks. Now I have a 1 ton. Half tons and partial floating axles are worthless! Nice video!
Thank you so very much. Clear, to the point and great demonstration for people like me who need visual references to fully comprehend written / oral instructions. Love it when the light bulb comes on in my old head.
So it looks that means that floating has wheel bearings that must be greased and repacked after so many miles instead of the bearings being lubed by the differential fluid..?
Thanks mate, very informative and helpful...Just saw a guy near me with a 1982 Jeep j20 dana 60 rear full float and dana 44 front for sale and needed to understand the full float concept ha, cheers
I have had a Grumman Olson step van for 20 years. This may sound stupid but no one could tell me wha the size was. I lost the tags from over the wiper motor. Anyway this is the first time I have ever seen exactly what I have. Thank you. Now where can you get parts for these rear ends. I need the seals for the axle and maybe a whole drum. Thank you again ..
Ford F 250's 3/4 ton used the full float Axel. Chevy and Dodge 3/4 ton use full float Axels also. F.Y.I. Class 8 Big Rigs use full float design as well. Some wrecker drivers remove the Axles instead of removing the drive shat to protect the transmission when towing a big rig. The keep a 2 Cap's made of plywood handy to cover the holes on each side.
I have a 93 suburban with a semi float and 3:42 ratio..I have plans for a 6inch lift and 35s or 37s even if I need a body lift for the 37s...I know that lower gears are needed and that's going to cost alot but am I wasting time and money keeping the 10 bolt or can it be made strong enough without going to a 14 bolt? if I was to get a good deal on a 14 bolt with the low gears already in then all I would need to do is match the front gears..I don't rock crawl unless it's just a pebble in the road and I don't do any mud diving..I just like the looks..and no I never go to the mall.
The weight of wheels and drivetrain affects acceleration and deceleration, it has nothing to do with unsprung weight. Unsprung weight is more of a handling issue.
I have a question maybe you can answer, maybe not. I have a 1953 IH Metro van dually. I want o know if it's possible to replace all the bearings in the axles or should a guy just replace everything with newer more recent axles etc.
Dig-It! I'll listen to anything concerning mechanical engineering, (even if no need):-) But how about one of you scholars do a hands on vid concerning beefing up one old rusty XJ Motor Brackets, (not motor mounts), utilizing existing OEM threaded holes on the Engine Block?
No shear. Load-carrying applies strictly a bending moment to the axle shaft. The load of the vehicle is carried at the very end of the axle shaft, but the bearing is a few inches inboard of that location. Think of the axle as a lever with the bearing being the fulcrum. One end of the lever is very long and needs very little force applied at the end to make all forces balance (that's the end that splines into the differential side gear). The other end of the lever is very short and thus is subject to much greater stress (that section between the bearing and the axle flange which the wheel is bolted to, and using the crowbar analogy, this is the part where the crowbar does its job, so you can visualize how much greater the bending stress is there). In actual fact, the bending stress is the same at any given distance of both sides of the bearing, but it decreases rapidly with distance from the bearing, so most of the inboard section of the shaft is NOT under much bending stress.
Tyler what would you recommend for axle swap on 1998 ZJ I been looking 1984-1991 SJ because they are Dana 44 with a width 72.8 to my current width of 69.2 which is a 5.6 or 2.3 difference on each side. Which I am okay with. The rear is full float but the front is semi. I prefer a full float in the front after watching this video. Is the and ideal setup for wheeling daily driver. Perhaps i maybe over looking other axles. Your thoughts?
He addressed that, he said NASCAR has been using full floating axles for a long time. That way if an axle breaks, you don't have the wheel separating from the car with the centrifical force.
I have a question? It may sound dumb.. you or anyone out there is it impossible to use orange rcv boots on regular front axle u joints as protection from debris or whatever could hurt them u joints.
+Bailey Ferguson I really doubt that would work as they wouldnt fit properly and the CV is machined to hold the boot on. Besides, U-joints dont need any protection from mud or debris... Any covering would just hold water.
+Jeff Young Yes but shorter due to the u-joint/CV and the outer shaft and brakes width. Only the "inner" is full float. But if you think about it, so is an outer shaft. Because of this 2 piece design and shorter widths with angle between, the u-joint is the weak point in the front. A CV is stronger than an outer. Happy Jeeping!
can Anyone explain carden joints ? That's what older four wheel drives had on their front axle prior to the late 70s. And the wheel bearings floated in oil. They were not packed in Grease.
@@frankpaya690 A Cardan joint is two standard cross joints mounted in series, but 90 degrees out of phase, with a central ball and shaft that maintains alignment (keeps the joint from "flopping around" since it's a double joint and therefore not self-supporting against side loads). This way, the variation in rotational speed of the driven side versus the driving side gets cancelled out across the full length of the joint. Only the center portion of the joint has a rotational speed that varies, but there's no ill effect from that. Note, the variation in rotational speed of a standard cross joint only occurs when the joint is "bent", and increases (becomes a more severe problem) as the amount of deflection increases. For a typical driveshaft, the cross joints at each end are directly out of phase, and the angles of deflection are roughly the same (or should be), so the whole driveshaft works just like a Cardan joint, with the central portion (the actual shaft) varying in rotational speed with each full rotation, but the two ends driving and driven shafts at each end both spinning at constant speed. Sorry that's so long. For what it's worth, I've never seen a Cardan joint on the steering knuckle of the front axle of any light-duty 4x4 (nor have I seen any with oiled front wheel bearings). There were plenty that used Tracta joints (like Dodge Power Wagons after WWII), and I've heard of some older light trucks (some "almost-medium-duty" IHCs) using a Bendix-Wiess joint. Both of these are constant-velocity joints, like a Cardan joint is, but they work in very different ways. I HAVE seen Cardan joints at the knuckles of heavy-duty Marmon-Herrington front axles.
AND ALL THE NEW REAR ENDS CARRY ALL THE WEIGHT ON THE HOUSING AND THERE ISNT A RACE IN THE HOUSING IT ALL RUNS ON THE HOUSING AND WHEN THE BEARING GOES BAD SO DOES THE HOUSING THE OLDER HOUSINGS HAD A REPLACABLE RACE THAT SAVED THE HOUSING
Good video I can't stand the intro they think this is major tv production just show me the video without the intro. Not just this one but all of them I just skip them.
One of the best, most clear explanations of full vs semi float.
Best explanation full float axle in youtube, don't waste your time to look for others.
This is something I've been wondering about. Having physical examples on hand is the best method of explanation.
I clicked when I saw “Bleepinjeep” I knew the difference on full and semi float.... but your video on gear ratio certainly was impressive just like this video..... your videos are educational, you are an asset to DIYers and TH-cam well done!
My humble request cut the intro, it’s too long, loud (people listening to tutorials tend to keep volume up sometimes), and for some viewers who are new to you might not even watch. My 2 cents!
Great videos! Cheers!
X2
One thing many here will already know, but might be useful to others, is that in most modern semi-floating axles, the shafts are retained via C-clips to the side gears of the differential, not by a bearing cap at the end of the housing combined with a pressed-on sleeve that keeps the wheel bearing from sliding inward, as was common years ago (and as shown on your semi-floating example here).
thanks for the explanation on full floating. However your description un unsprung weight was actually describing rotational mass. Unsprung weight is everything connected to the body via the suspension, the more unsprung weight you have the less responsive it will become, its more important for high speed traction!
I saw a half ton pickup on the side of the road a few weeks ago. Resting on its rear bumper with a bumper pull toy hauler behind it. I imagine that guy could have benefited from watching this. Good explanation sir.
I had a ford 9 inch break on me with a camper and trailer on the truck. We were going camping and we were 30 miles from the nearest phone. Needless to say, that sucked. It could have been a little better if the entire wheel hadn't come flying off. Luckily we were on flat straight road and not the switchbacks. Now I have a 1 ton. Half tons and partial floating axles are worthless! Nice video!
Thank you so very much. Clear, to the point and great demonstration for people like me who need visual references to fully comprehend written / oral instructions.
Love it when the light bulb comes on in my old head.
Outstanding explanation & demonstration!!!
Excellent explanation. Thanks for that tutorial.
-Pidge
Awesome explanation! Very clear and descriptive, thanks for sharing your knowledge with us!
very good explanation I learn something new everyday. Thanks for taking time out to share this knowledge. -PawPaw
I second this comment. Thank you
My 2004, 3500 Silverado dually, only with disc, full float...great explanation, thank you! I subscribed.
So it looks that means that floating has wheel bearings that must be greased and repacked after so many miles instead of the bearings being lubed by the differential fluid..?
I have the 14 bolt semi floater and need to change the drum brakes. Could you send me a link to a brake kit. Cant find it anywhere
One day, in the far future I hope to get a M715 and do major work on it so this video is helps me look forward to that glorious day. Thank you
So helpful! Thank you. Especially having the actual axles for demonstration. :)
Great video, thanks for the info and very good detail on how a full float axle works. Thanks again and please keep them coming
Thanks mate, very informative and helpful...Just saw a guy near me with a 1982 Jeep j20 dana 60 rear full float and dana 44 front for sale and needed to understand the full float concept ha, cheers
Thanks for taking the time to explain.
That new intro is waaaay too long
I agree
+Corey Henton I do not know about way too long, but it is long.
You guys must think your order at McDonald's takes too long too.
looks fucking good tho
I agree it's necessarily long for TH-cam.
I have had a Grumman Olson step van for 20 years. This may sound stupid but no one could tell me wha the size was. I lost the tags from over the wiper motor. Anyway this is the first time I have ever seen exactly what I have. Thank you. Now where can you get parts for these rear ends. I need the seals for the axle and maybe a whole drum. Thank you again ..
Ford F 250's 3/4 ton used the full float Axel. Chevy and Dodge 3/4 ton use full float Axels also. F.Y.I. Class 8 Big Rigs use full float design as well. Some wrecker drivers remove the Axles instead of removing the drive shat to protect the transmission when towing a big rig. The keep a 2 Cap's made of plywood handy to cover the holes on each side.
Very clear. Finally understand this. Thanks
I can't find a video that shows all the grease points on XJ's. Can you please do one? thanks
I'll put it on the list
I have a 93 suburban with a semi float and 3:42 ratio..I have plans for a 6inch lift and 35s or 37s even if I need a body lift for the 37s...I know that lower gears are needed and that's going to cost alot but am I wasting time and money keeping the 10 bolt or can it be made strong enough without going to a 14 bolt? if I was to get a good deal on a 14 bolt with the low gears already in then all I would need to do is match the front gears..I don't rock crawl unless it's just a pebble in the road and I don't do any mud diving..I just like the looks..and no I never go to the mall.
That was a awesome 👌 explanation, are there full floating front differentials and what vehicles can you get them from and cost??? Just asking
How do you pull a broke axle stub out of the rear end through the axle tube? It's only a couple of inches long.
Take the cover off & push it out with a heavy wire or flexible rod.
Thank you, sir! Excellent presentation!
What are your thoughts on locking hub on a Dana 44 rear axle for the purpose of flat towing
Thanks for the clear info.. wait, did you say 'hhweels'?
The weight of wheels and drivetrain affects acceleration and deceleration, it has nothing to do with unsprung weight. Unsprung weight is more of a handling issue.
I have a question maybe you can answer, maybe not. I have a 1953 IH Metro van dually. I want o know if it's possible to replace all the bearings in the axles or should a guy just replace everything with newer more recent axles etc.
Link for shave kit?
Great video now I understand what’s under my duramax
Thanks for clearing that up for me. 👍
Thank you so much for the video extremely helpful and full of information!!!
Great explanation, thank you.
Man thanks for the class!
Thank you very much
..nice explanation
Invented by Chevrolet in the 1930s used in the Toyota Land Cruiser since way back. Jeep has a long way to catch up.
thank you for your explanation. i'm not a car person, would appreciate if someone tell me which axle on my 1983 BJ40 ?
Dig-It! I'll listen to anything concerning mechanical engineering, (even if no need):-)
But how about one of you scholars do a hands on vid concerning beefing up one old rusty XJ Motor Brackets, (not motor mounts), utilizing existing OEM threaded holes on the Engine Block?
Excellent explanation! Thank you!
Glad you enjoyed it!
Great explanation man.
The weight on the axle and bearing would be sheer forces
bending moment too
No shear. Load-carrying applies strictly a bending moment to the axle shaft. The load of the vehicle is carried at the very end of the axle shaft, but the bearing is a few inches inboard of that location. Think of the axle as a lever with the bearing being the fulcrum. One end of the lever is very long and needs very little force applied at the end to make all forces balance (that's the end that splines into the differential side gear). The other end of the lever is very short and thus is subject to much greater stress (that section between the bearing and the axle flange which the wheel is bolted to, and using the crowbar analogy, this is the part where the crowbar does its job, so you can visualize how much greater the bending stress is there). In actual fact, the bending stress is the same at any given distance of both sides of the bearing, but it decreases rapidly with distance from the bearing, so most of the inboard section of the shaft is NOT under much bending stress.
woow...grt job sir...really help full
Tyler what would you recommend for axle swap on 1998 ZJ I been looking 1984-1991 SJ because they are Dana 44 with a width 72.8 to my current width of 69.2 which is a 5.6 or 2.3 difference on each side. Which I am okay with. The rear is full float but the front is semi. I prefer a full float in the front after watching this video. Is the and ideal setup for wheeling daily driver. Perhaps i maybe over looking other axles. Your thoughts?
GlockUSMC how big of tires are you running, also what motor does your ZJ have?
How do you bolt a tire to the hub?
thanx bud this vid helped out
Thanks. You answered to my question.
Thanks for the info. Well done
good explanation
really helpful
Which is better for race cars fully or semi floating axles??????
He addressed that, he said NASCAR has been using full floating axles for a long time. That way if an axle breaks, you don't have the wheel
separating
from the car with the centrifical force.
I have a question? It may sound dumb.. you or anyone out there is it impossible to use orange rcv boots on regular front axle u joints as protection from debris or whatever could hurt them u joints.
+Bailey Ferguson I really doubt that would work as they wouldnt fit properly and the CV is machined to hold the boot on. Besides, U-joints dont need any protection from mud or debris... Any covering would just hold water.
+BleepinJeep oh ok... thanks for reply but I thought it would kinda.
Thanks for making the video
great explanation. thanks
Great explanation.
Well done sir!!!
Are front axles full float?
yes
+Jeff Young Yes but shorter due to the u-joint/CV and the outer shaft and brakes width. Only the "inner" is full float.
But if you think about it, so is an outer shaft.
Because of this 2 piece design and shorter widths with angle between, the u-joint is the weak point in the front. A CV is stronger than an outer.
Happy Jeeping!
can Anyone explain carden joints ? That's what older four wheel drives had on their front axle prior to the late 70s. And the wheel bearings floated in oil.
They were not packed in Grease.
@@frankpaya690 A Cardan joint is two standard cross joints mounted in series, but 90 degrees out of phase, with a central ball and shaft that maintains alignment (keeps the joint from "flopping around" since it's a double joint and therefore not self-supporting against side loads). This way, the variation in rotational speed of the driven side versus the driving side gets cancelled out across the full length of the joint. Only the center portion of the joint has a rotational speed that varies, but there's no ill effect from that. Note, the variation in rotational speed of a standard cross joint only occurs when the joint is "bent", and increases (becomes a more severe problem) as the amount of deflection increases. For a typical driveshaft, the cross joints at each end are directly out of phase, and the angles of deflection are roughly the same (or should be), so the whole driveshaft works just like a Cardan joint, with the central portion (the actual shaft) varying in rotational speed with each full rotation, but the two ends driving and driven shafts at each end both spinning at constant speed.
Sorry that's so long.
For what it's worth, I've never seen a Cardan joint on the steering knuckle of the front axle of any light-duty 4x4 (nor have I seen any with oiled front wheel bearings). There were plenty that used Tracta joints (like Dodge Power Wagons after WWII), and I've heard of some older light trucks (some "almost-medium-duty" IHCs) using a Bendix-Wiess joint. Both of these are constant-velocity joints, like a Cardan joint is, but they work in very different ways. I HAVE seen Cardan joints at the knuckles of heavy-duty Marmon-Herrington front axles.
"V-Hickle"
AND ALL THE NEW REAR ENDS CARRY ALL THE WEIGHT ON THE HOUSING AND THERE ISNT A RACE IN THE HOUSING IT ALL RUNS ON THE HOUSING AND WHEN THE BEARING GOES BAD SO DOES THE HOUSING THE OLDER HOUSINGS HAD A REPLACABLE RACE THAT SAVED THE HOUSING
Does nascar use solid axles instead of independent axles?
+Kico Horvat They use solid rear axles
+BleepinJeep Why?Independante rear axles are better i think for high performance cars.
+Kico Horvat because Nascar is a knife fight...not a fencing match.
old landcruisers use full floating
Apparently the little WWII Willys Jeeps use them as well.
I have an 83 FJ60 and it is Full float. This I learned as I searched for a bearing kit. Nice to know
Thx, I needed that!
14 bolt is dana what?
Tq sir now I study more new parts and name of that
top marks bro
love ur vids!
Veee-Hikull 👍👍
Nascar mandates strong rear ends but they are not full floating axles.
+fordwindsor351 cool story bro
A SEMI FLOATING AXEL WILL ONLY SINK HALF WAY
thx!
tanks
I like this
👍🏻
❤❤❤❤
Good video I can't stand the intro they think this is major tv production just show me the video without the intro. Not just this one but all of them I just skip them.
Intro was a little too long but not bad video
shear force haha
what would want for those full width axles haha
+Ron Matheson If only they were mine....Unfortunately the 14 bolt and the D60 are my cousin's. :(
+Tyler Bleepinjeep do you know why matt didn't go with fullwidth axles (60/14bolt) for his crawler build?
+Charley Williams He wants to stay as light and narrow as he can. It works better for him on the terrain he normally wheels.
No need to spew profanity son, just simply say, "what is a full float axle." A proper education in the English language will allow you to do that.
first!!!!!
That intro is ridiculously long and stupid
Vee HI cle......... lol
Awesome explanation thank you