What is a full-float axle? What is a semi-float axle?
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- เผยแพร่เมื่อ 28 ม.ค. 2016
- Ever wonder what they're talking about when they say semi-float or full-floating axles? Here's a quick video explaining the differences between the two axle types to help you out.
Need a Full float axle?: amzn.to/2eYy0te
Semi float?: amzn.to/2feDcIU
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One of the best, most clear explanations of full vs semi float.
This is something I've been wondering about. Having physical examples on hand is the best method of explanation.
Outstanding explanation & demonstration!!!
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!
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
Excellent explanation. Thanks for that tutorial.
-Pidge
Thanks for taking the time to explain.
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!
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.
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.
very good explanation I learn something new everyday. Thanks for taking time out to share this knowledge. -PawPaw
I second this comment. Thank you
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
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
woow...grt job sir...really help full
Thanks for clearing that up for me. 👍
Great explanation man.
My 2004, 3500 Silverado dually, only with disc, full float...great explanation, thank you! I subscribed.
Man thanks for the class!
Thank you very much
..nice explanation
Awesome explanation thank you
That was a awesome 👌 explanation, are there full floating front differentials and what vehicles can you get them from and cost??? Just asking
good explanation
really helpful
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
Very clear. Finally understand this. Thanks
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 ..
Great explanation, thank you.
Thanks. You answered to my question.
Thank you, sir! Excellent presentation!
Thanks for the info. Well done
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..?
Great explanation.
Great video, thanks for the info and very good detail on how a full float axle works. Thanks again and please keep them coming
thanx bud this vid helped out
great explanation. thanks
Great video now I understand what’s under my duramax
What are your thoughts on locking hub on a Dana 44 rear axle for the purpose of flat towing
Excellent explanation! Thank you!
Glad you enjoyed it!
love ur vids!
thank you for your explanation. i'm not a car person, would appreciate if someone tell me which axle on my 1983 BJ40 ?
Thx, I needed that!
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.
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.
Thanks for making the video
Thanks for the clear info.. wait, did you say 'hhweels'?
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.
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?
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
Thank you so much for the video extremely helpful and full of information!!!
top marks bro
Link for shave kit?
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?
Tq sir now I study more new parts and name of that
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.
How do you bolt a tire to the hub?
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.
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.
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.
thx!
Invented by Chevrolet in the 1930s used in the Toyota Land Cruiser since way back. Jeep has a long way to catch up.
I like this
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.
"V-Hickle"
👍🏻
tanks
Veee-Hikull 👍👍
❤❤❤❤
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
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.
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
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.
14 bolt is dana what?
shear force haha
Nascar mandates strong rear ends but they are not full floating axles.
+fordwindsor351 cool story bro
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.
A SEMI FLOATING AXEL WILL ONLY SINK HALF WAY
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.
first!!!!!
Intro was a little too long but not bad video
Vee HI cle......... lol
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.
That intro is ridiculously long and stupid
Awesome explanation! Very clear and descriptive, thanks for sharing your knowledge with us!