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Front axle 4X4 disconnect possible ?

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It is not relative. Lets break this down another way. Regardless of driving style, mpg or GCVW it will still take the same energy to spin the front end. If the hubs give Steved a 1 mpg gain and assuming an average of 18 mpg before the hubs and 19 after, in 30k miles the hubs will need 88 gallons less fuel.



To put it another way it takes the energy of 88 gallons of fuel to uselessly turn the front end for 30k miles on a 3G truck. Maybe you buy so much fuel that 88 gallons gets lost in the cracks, but make no mistake, over 30k miles you too will use that same 88 gallons to uselessly turn your front end!



Btw 425K = 1,247 gallons saved.







Advantages with locking hubs



1. Saves energy (fuel)

2. Saves wear and tear

3. Allows 2wd lo

4. Can drive the truck even with a worn or broken wheel ujoint or worn or broken front driveshaft ujoint

5. Much simpler and cheaper wheel bearing repair/replacement

6. May reduce or eliminate the 70 mph vibes





Advantages with unit bearings



1. Cheaper and easier for Dodge to assemble the truck

2. Unit bearings need no re-packing or other maintenance

3. Good for people who cannot get out of their truck to lock the hubs and/or cannot anticipate marginal traction conditions.



Say you could get the truck off the lot with freewheeling hubs or with the unit bearings for no cost difference. Would you really pick the unit bearings?
 
It is not relative. Lets break this down another way. Regardless of driving style, mpg or GCVW it will still take the same energy to spin the front end.

Your trying to justify, in your mind, spending $2,200 ... ... ... . that's okay, we all make mistakes. If you wanted a 2wd, you should have bought a 2wd.









Advantages with locking hubs



1. Saves energy (fuel)

Show me proof, I want a fuel log ... ... ... winter, summer, empty, loaded, etc

2. Saves wear and tear

On what?

3. Allows 2wd lo

I've got a 6spd and 4:11 rears, no biggy, I bought what suited me

4. Can drive the truck even with a worn or broken wheel ujoint or worn or broken front driveshaft ujoint

Why would you?

5. Much simpler and cheaper wheel bearing repair/replacement

(3) in 425,000 miles is not that big an inconvenience, I do preventative maintenance (refer to #4)

6. May reduce or eliminate the 70 mph vibes

never had it





Advantages with unit bearings



1. Cheaper and easier for Dodge to assemble the truck

probably

2. Unit bearings need no re-packing or other maintenance

exactly

3. Good for people who cannot get out of their truck to lock the hubs and/or cannot anticipate marginal traction conditions.

Is this your best argument? Or is this a dig because I'm 40 and 220#, LOL, hey, I am 6'1" though :-laf



I've had 4x4 since I was 16, before 4x4 was cool, never been without, never owned a car. All we had were Warns on the Dana 60, or some guys had a Dana 44.



I find myself in all kind of situations where 4x4 is a little icing ... ... . and not anticiapted. I know that some of you puddle jumpers don't undersatand that.



IF, you are incinuating that I'm lazy, you are very wrong.



I cover all 48 states, 12 months out of the year. Hauling horses, I end up on back township roads, or out west on roads that aren't even on GPS. Each road is a new encounter, and I don't even want to get out and lock hubs in ... ... ... . I just want 4x4 when I want 4x4. It could even be something as simple as turning around in a barn lot. People have a habit of not realizing how big my trailer is ... ... . but once I'm in, I'm in and it's up to me to NOT get stuck. A lot of times, not getting stuck, means not stopping! You've obviously not pulled many trailers, and even worse with a dually, and obviously not in other than ideal terrain.



You can go on justifying your purchase to yourself, but it doesn't meet my needs.



And STILL, nobody has shown me a fuel log or spreadsheet :confused:
 
My trucks are used for hauling only, 1200 miles one way empty (no trailer) and loaded back (stacks of trailers). Even 1 MPG on a trip adds up. U-joint went out and I had to make a run with out the drive shaft got the best MPG yet. The only other thing we had done to the truck was a complete service, all oils. The simple physics are, the less roll resistance the better the mpg. Even tens help when you are spending over a grand a week on fuel. The more the fuel goes up the bigger the savings. I just installed a Smarty Jr only looking for the MPG. I am hoping to see at lest a consistent 1. 5 MPG improvement between the two of them. That adds up to plenty for me. We keep our trucks for at least 250k miles. Having low range for backing big loads in ridiculous places would be worth it in it self.



I do agree, with a really big load little helps. On big loads I get about 7. 4 mpg.



04. 5 3500 4wd cc drw 6speed 373 51k

93 2500 2wd xc auto 354 250k
 
I do agree, with a really big load little helps. On big loads I get about 7. 4 mpg.



Buy a hub kit and get 8. 4 :-laf



I've ran 20,000 mile trips without a front driveshaft and not averaged any better fuel mileage. You must have had a tailwind, the ring and pinion are still turing.
 
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I've had an EMS kit for about 2 years now and have been very pleased. Not only do they sell a first rate kit, but they have better than first rate customer service.



As for a fuel spreadsheet, I don't have one. I can personally attest though that I figure I gained 1-2 mpg; hand calculated. I purchased the kit mainly because I didn't want the extra wear/tear on the front axle.



Yea, the kit will probably never pay for itself, but I like the ability to service my truck and they're cool! :D:D:D



My . 02 cents
 
And STILL, nobody has shown me a fuel log or spreadsheet :confused:





I would, but it would take far more time to produce than this thread is worth to me... I looked at some before/afters and I can say on the highway it was at least 1mpg overall.



Again, I bought it to eliminate the vibrations... if you never had them, consider yourself VERY lucky. 425k in a truck with them, and you would have shot it...



Call me old school, I like hubs. I like being in control and making the decision.



I don't travel nearly as much, but I still travel as bad of roads (and some where there are no roads)... I never found an advantage to either. 4wd is 4wd... you still got to think about pulling the lever, and turning a set of hub dials isn't any more difficult.
 
2. Unit bearings need no re-packing or other maintenance





This statement needs qualifying... unit bearings are not designed to be repacked or have other preventative maintenance done. Grease doesn't last forever...



Simply stated, they have a finite life expectancy.
 
Your trying to justify, in your mind, spending $2,200 ... ... ... . that's okay, we all make mistakes. If you wanted a 2wd, you should have bought a 2wd.
Your comment here shows that you are a hub hater. Logic be damned, just go on the attack, yes? I do not need to justify my hub purchase at all. I really do not care if I have a mpg gain and would do it again in a heartbeat. I bought the hubs because I do not like the idea of all those parts uselessly turning and wearing out for no good reason. I also had the stock wheel ujoints go bad (they were always turning, so I don’t understand why they failed :confused::-laf) and I had to soak them in WD40 to keep driving until I was ready to tear into those #$@! stuck unit bearings. Even ground a hole in one cap to inject grease in the joint! With locking hubs I could have fixed the ujoints more at my leisure. Btw I paid significantly less than $2,200. Where did you get that number from??



JHardwick said:
Originally Posted by brods

Advantages with locking hubs



1. Saves energy (fuel)

Show me proof, I want a fuel log ... ... ... winter, summer, empty, loaded, etc

2. Saves wear and tear

On what?

3. Allows 2wd lo

I've got a 6spd and 4:11 rears, no biggy, I bought what suited me

4. Can drive the truck even with a worn or broken wheel ujoint or worn or broken front driveshaft ujoint

Why would you?

5. Much simpler and cheaper wheel bearing repair/replacement

(3) in 425,000 miles is not that big an inconvenience, I do preventative maintenance (refer to #4)

6. May reduce or eliminate the 70 mph vibes

never had it





Advantages with unit bearings



1. Cheaper and easier for Dodge to assemble the truck

probably

2. Unit bearings need no re-packing or other maintenance

exactly

3. Good for people who cannot get out of their truck to lock the hubs and/or cannot anticipate marginal traction conditions.

Is this your best argument? Or is this a dig because I'm 40 and 220#, LOL, hey, I am 6'1" though
As for “is this your best argument”, that is what you anti-hub guys are saying!!



Heat is energy. If you do not heat the front axle assembly by uselessly turning it, you WILL save energy. How much will depend on several factors such as gear oil type and viscosity, outside temperature, etc.



Not constantly turning the front end saves wear and tear on the wheel ujoints, differential axle seals, carrier bearings, ring and pinion, pinion bearings, pinion seal, driveshaft ujoints, transfercase front output bearing and seal and the gear oil itself. I have yet to see something wear out from not using it!





I've had 4x4 since I was 16, before 4x4 was cool, never been without, never owned a car. All we had were Warns on the Dana 60, or some guys had a Dana 44.



I find myself in all kind of situations where 4x4 is a little icing ... ... . and not anticiapted. I know that some of you puddle jumpers don't undersatand that.



IF, you are incinuating that I'm lazy, you are very wrong.



I cover all 48 states, 12 months out of the year. Hauling horses, I end up on back township roads, or out west on roads that aren't even on GPS. Each road is a new encounter, and I don't even want to get out and lock hubs in ... ... ... . I just want 4x4 when I want 4x4. It could even be something as simple as turning around in a barn lot. People have a habit of not realizing how big my trailer is ... ... . but once I'm in, I'm in and it's up to me to NOT get stuck. A lot of times, not getting stuck, means not stopping! You've obviously not pulled many trailers, and even worse with a dually, and obviously not in other than ideal terrain.

You do not know what I’ve done or not done so why even speculate?



Since we're doing bios, I'm in my late 40's, 210lbs and 6'2". I honestly can’t remember when I got my first 4x4, but sometime in my early twenties. Jeep M38, IH Scout, 2 or 3 K5 Blazers, K5 Jimmy, Suburban, Dakota, a military Dodge 1-1/4 ton? pickup something or other, and the Ram. Almost every 4x I’ve owned either had manual locking hubs or lame automatic locking hubs (the kind people blow up because they don’t understand how they engage and just floor it). I have a Dana 60 front axle that has been under three different trucks, seen lots of highway miles, snow plowing and fairly hard core rock crawling under a full size K5. Guess what, it still has the stock non-greasable ujoints that spin only when the hubs are locked! I have never broken a hub.



Fwiw I’ve driven cars, pickups, box vans, work trucks with trailers on muddy construction sites, large box trucks and a dump truck. I've towed several different rental trailers from wood chippers to flatbeds loaded with pipe. I currently own two trailers that I have used to transport hundreds of thousands of dollars worth of filtration equipment from place to place. Might not have near as much total mileage as you, though I have probably driven over 500k miles over the years, in all weather conditions. Even so, I will admit I know little and can always learn more. So please do feel free to school me with your vastly superior knowledge. :D





You can go on justifying your purchase to yourself, but it doesn't meet my needs.



And STILL, nobody has shown me a fuel log or spreadsheet :confused:
Ok, all kidding aside, the bottom line is you have decided that for you the locking hubs are too much trouble to lock in all the times you may need 4x4, so you prefer to spend a little more in fuel for the convenience of always having 4x4 just a tcase lever throw away. That is fine. It doesn’t mean the freewheeling hubs are not generally a better way to do things.



Btw you never did answer: If the truck came either way from the dealer, for no extra charge, which would you choose?
 
OK it seems like somebody here like insulting others educated decisions to convert to locking hubs. All of the stated reasons for going to locking hubs are valid. The mfg's went away from them for one reason, to save costs.



I don't mind educated arguments but some of these here are just down right insulting.



First i did not by locking hubs to save fuel mileage, that is a side benefit. I bought the hubs to eliminate the high speed drive line vibration issues that come from my suspension lift. It was very clear during the conversion to see that if you run oversize tires that the stock unit bearings are a extremely weak point on the front end. Also after everyone complains about their failing axle u joints it amazes me that some would worry about not getting enough exercise.



Lastly I bought a 4x4 because when I need it I need it which is approx 5% of the time I spend driving I don't need to push it around for 95% of the time.



Go ahead time for the counterpoint!
 
If the truck came either way from the dealer, for no extra charge, which would you choose?
Hubs for sure but with non oe aftermarket parts is there not a risk of down time? Educate me if I am wrong but they are aftermarket right? I mean these kits are not using oem stuff from a different application.



Example... trucks gets hit and damages something in there, spindle, or whatever with a dealer unitised bearing available on a moments notice but who's to say the damaged aftermarket part is easy to find in 2018?

Other things can happen like water intrusion gone unnoticed gauling components that need replacement.



I am no hub hater, would love to have em but dang... those are awfully spendy to save so little on fuel, I could care less about wear on the front end cuz I will wear out the truck before the front axle.
 
Btw you never did answer: If the truck came either way from the dealer, for no extra charge, which would you choose?

I'm not sure. I'd probably opt for the sealed units ... ... ..... no springs, no cams, no slider gears, no loss of fuel mileage, everything stays lubed nice ... ... ... . yeah, I'd go with the sealed units.



Heck, I've driven over 5,000 miles and never came OUT of 4x4 before.



Besides, what am I supposed to do for a front wheel center cap :confused:



The ONLY thing that effects my fuel mileage is a head/tail wind ... ... ... . that's it. 1 horse, 6 horses, no horses, rolling hills, steep hills ... ... ... ... . wind and speed effect my mileage. It hovers between 11. 5 and 12, and locking hubs aint gonna make it 12. 5 to 13. I've ran with no front drive shaft, and didn't gain an ounce.



Yes, ujoints in service need used, seals in service need used, or they go bad just sitting there.



FOR ME, hubs make no sense. IF, IF, there was a mileage gain, then yes, I'd weigh the effects.
 
I like having less parts. Plus, I don't like front end parts to lie dormant for long periods of time ... ... ... . hard on ujoints etc.



The mileage gain is up in the air as far as I'm concerned, and would never pay for itself.



Ujoints on the shelf don't have road spray seeping into them to just lay in one spot.



IF, IF, there is a 1mpg gain, 75,000/80,000 miles sounds about right, before breaking even. In town commuters will most likely never realize that, nor will guys towing most of the time.



I think it's more a matter of personal preference, and needs. I've only had (3) unitized bearings replaced in 425,000 miles. And @ 18,000#'s I'll never see a 1mpg gain. And pulling a trailer in/out of barns all over the country, a 4x4 situation has snuck up on me more times than I can count year 'round.



OK it seems like somebody here like insulting others educated decisions to convert to locking hubs. All of the stated reasons for going to locking hubs are valid. The mfg's went away from them for one reason, to save costs.



I don't mind educated arguments but some of these here are just down right insulting



Here are my first (2) posts ... ... ... ... ..... hmmmmmmmmmmmm?
 
No, I was called a "hub hater" because they don't fit my needs.



Show me YOUR fuel logs :)
The hub hater comments were meant to poke fun not to start a war. When someone chooses to ignore the laws of physics, that leads me to believe they are more emotionally invested in their opinion and not willing to be objective. Refusing to acknowledge that it takes extra fuel to create the friction that causes the heat in the front end is not logical. Insisting on mudding the waters by wanting some substantial increase in low towing mpg numbers is a diversion from the issue.



The amount of fuel saved will be within a set range dictated by several factors, but not by your mpg or how much you tow. Guys in cold climates making shorter trips where the gear oil is thick will save more than guys living in desert states driving greater distances where the gear oil gets hotter and thinner. Just simple physics.



Anyhow, reducing friction saves fuel, period. Is it enough for most to justify paying for hubs? Who knows, though at today’s fuel prices the payback period has certainly gotten much shorter. Even so, I would not buy the hubs just to save fuel, they do cost a lot, and the costs go up even more if a mechanic has to be paid to install them. As has been stated several times over, the fuel savings is usually looked at as a side benefit in the decision to buy the hubs.





Btw, JH please do not tell my Dana 60 that it needs to be spun all the time, after 20+ years of life it still has the original ujoints, axle seals, etc. I'd hate to have to replace all that stuff!



Matt400, yes we are talking about aftermarket hubs, the OEM does not offer them as an option.
 
I thought the OEM hubs could be greased via removing the ABS sensor and using syringe type injector.



And your mixing grease, which is a no-no... unless you take them completely apart, which is beyond the capabilities of a lot of people (lack of tools), you cannot get all the old grease out.
 
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