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Portal axle 101 for Britney...

V

Vonski

nothing to see here...
Location
Payson, Utah
Britney was asking me about portal axles, and I think I explained the low gearing and cable operated lockers well enough. However, it's kinda hard to explain the look or shape of 'em without a pic.

So Britney, You'll be able to see why there is an advantage when it comes to ground clearance. Simply look at where the rim bolts on in relation to the axle tubes and differential.
 
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britney

britney

Queen of Chit!!
Location
Chit-Chat, Duh!!
O.K. it took me a minute to figure out what you were talking about , now I think I do. Jeremy isn't here to explain what I am seeing better and I don't want to call him so here I go, sorry if I sound stupid but how else do we learn.


I see the ground clearance is quite obvious, but if the axle is bolted to the top of the rim and the axle shaft is going through to do the spinning how does it spin the wheels efficiently? I don't see it. and Remind me what the differential is.
 
Shawn

Shawn

Just Hanging Out
Location
Holly Day
Originally posted by britney
but if the axle is bolted to the top of the rim and the axle shaft is going through to do the spinning how does it spin the wheels efficiently?
Click to expand...



Say What??:confused:
 
V

Vonski

nothing to see here...
Location
Payson, Utah
Originally posted by britney
O.K. it took me a minute to figure out what you were talking about , now I think I do. Jeremy isn't here to explain what I am seeing better and I don't want to call him so here I go, sorry if I sound stupid but how else do we learn.


I see the ground clearance is quite obvious, but if the axle is bolted to the top of the rim and the axle shaft is going through to do the spinning how does it spin the wheels efficiently? I don't see it. and Remind me what the differential is.
Click to expand...

It got ya thinkin, huh? Good girl...:D Anywho, the diff. is located in the center of the axle (where it is round). So, you have axle shafts going out and away from the diff. on both sides, right? They basically go to gears on the ends. The gears on the ends drive another set of gears below, then drive the wheels attatched to the ends. Folow me? Thats how they can get away with not having axle shafts that go straight from the diff. to the wheels like a normal axle. I have never had to explain that before, so I hope its good.
 
Shawn

Shawn

Just Hanging Out
Location
Holly Day
Yes, and the best thing about the portals is the diff gears can be high meaning they can be kept larger=stronger. Where the shafts meet the outer gears is were the reduction comes into play. Right before the tire... nice,,, strong,,, good ground clearence... sweet... drooling...
 
I Lean

I Lean

Mbryson's hairdresser
Vendor
Location
Utah
Originally posted by britney
O.K. it took me a minute to figure out what you were talking about , now I think I do. Jeremy isn't here to explain what I am seeing better and I don't want to call him so here I go, sorry if I sound stupid but how else do we learn.


I see the ground clearance is quite obvious, but if the axle is bolted to the top of the rim and the axle shaft is going through to do the spinning how does it spin the wheels efficiently? I don't see it. and Remind me what the differential is.
Click to expand...

Hmm, lessee if I can help ya out here. The axleshaft drives through the middle of the tube as normal, but before it gets to the part that drives the actual wheel, there's a set of gears. That's where the difference between the height of the input (the axleshaft) and the output (to the wheel) comes from.
 
V

Vonski

nothing to see here...
Location
Payson, Utah
Originally posted by I Lean


Hmm, lessee if I can help ya out here. The axleshaft drives through the middle of the tube as normal, but before it gets to the part that drives the actual wheel, there's a set of gears. That's where the difference between the height of the input (the axleshaft) and the output (to the wheel) comes from.
Click to expand...

Hey, thats a much better explanation than mine... ba$tard... :p
 
britney

britney

Queen of Chit!!
Location
Chit-Chat, Duh!!
I was going to have my next "teach britney" be all about axles but since we're already at it we might as well continue......

What exactly do the gear ratio #'s that I always see mean? I know that lower gears are better but I don't know what the #'s mean.

and will someone please tell me what makes a D-60 worth $1000? I just can't comprehend it.
Ouch to my bank account, I want to know it was worth every penny!!
( I told Jeremy I was going to ask this question and he laughed then said " that's a good question go right ahead." What did he mean by that?)
 
V

Vonski

nothing to see here...
Location
Payson, Utah
Well, I really need to get the hell out here and go home, but I'm sure someone will help ya out with the gear ratios.

As for that $1000 D60 front axle, he did a very smart thing and will save you both money in the long run in non-broken parts.


Jeremy...you owe me. :p
 
Coreshot

Coreshot

Resident Thread Killer
Location
SL,UT
Britney, the ratio #s work like this...
Example: I'm using 5.13 gears for my yota. This means that for each revolution of my ring gear, my pinion will turn 5.13 times. Tire revolutions directly match the ring gear, so in order to turn my tire one full rev., my driveline needs to turn 5.13 times. This equals slower speed and more torque from the engine than if I had 3.73s.
 
britney

britney

Queen of Chit!!
Location
Chit-Chat, Duh!!
I was a bit confused about why a higher # is slower but luckily Jeremy just called and I was able to get the entire lowdown on how gears and their #'s works. I believe I now understand Gears.

So why the $1000, heck if low gears are so important just get out and push the dam thing. I think my ratio is about 500:1 that's pretty slow isn't it and I'll do it for free!! :D :D J/K my engine doesn't work to well so you wouldn't go anywhere.
 
Shawn

Shawn

Just Hanging Out
Location
Holly Day
Originally posted by britney
I was a bit confused about why a higher # is slower but luckily Jeremy just called and I was able to get the entire lowdown on how gears and their #'s works. I believe I now understand Gears.

So why the $1000, heck if low gears are so important just get out and push the dam thing. I think my ratio is about 500:1 that's pretty slow isn't it and I'll do it for free!! :D :D J/K my engine doesn't work to well so you wouldn't go anywhere.
Click to expand...


A Dana 60 cost about $1,000.00 for several reasons.

These axles are getting hard to find.

They are One Ton axles, breaking one in a Jeep like Jeremy's will be rare. They came off a truck that weighs TWICE as much.

The shear strenth of these axles makes them Extreamly stought after.

And last but not least, and the, most important, Bragging Rights;)
 
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