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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby RustyPW » Thu May 11, 2017 3:02 pm

NickTF wrote:
RustyPW wrote:
NickTF wrote:It's indisputable that gears will help the truck with larger tires pull better; however, as the prior poster demonstrated gearing is almost certainly less of the limiting factor than the soft suspension of these trucks. Our trucks with 37" tires and factory 4.10s are near the same gear wise as a 3.73 gear truck with 33" tires. I'm guessing the 4.10 equipped 2500 non power wagon trucks have a 31-32" tire from the factory and are rated to pull over 15000 while the 3.73 trucks are closer to 12-13k off the top of my head. Unless you pull mountains regularly or loads well north of 10k I don't think you're going to be too bad off with 37" tires and 4.10 gears but 4.88s will most definitely work better. If tranny temps aren't hot I don't see the issue.

We're looking at work trucks right now to pull a 14000lb trailer at around a gcwr of 27,000. I feel weird doing it but am pushing for the v10 6.8L gas option because I want nothing to do with today's diesels. If they could only stick a cummins 12v in an f550 or ram 5500......

Had a 2014 Fleetwood Bounder motorhome with the 6.8 V10. Weight fully loaded was around 31,000lbs. Fuel mileage was between 4 to 12 mpg. The V10's have their problems too.


Sure, nothing is trouble free and with 4.88 gears am fully prepared for the mpg you've indicated. But they don't have as many absolutely half assed EPA mandated emissions equipment shortening their life span, costing far too much money to repair, regen popping up, fuel filters needing changed every 10-15k, ~12qt oil changes, fuel gelling when super cold, sensitivity to excessive idling, turbo cool down periods, etc, all for a premium of another $9000 or so. Change the oil and filter and go (aside from the obvious other things which would need serviced in either motor platform).

All true. Getting a diesel in a pickup, you have to decide on how many miles you will be driving, and the weight you will be hauling/towing to see if it economical or not. The more miles per year. Then the diesel makes more sense.

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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby Rodeoflyer » Thu May 11, 2017 6:49 pm

I'm loving the oil change at 15k and put gas in her petrol life.

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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby TankerZak » Fri May 12, 2017 7:28 am

Bill2014 wrote:
TwinStick wrote:The simplest solution (for the manufacturers) would be to design a computer program that will let the driver decide what gear to hold it in & for how long to hold it there. As we all know, the Hemi needs to rev to make its power. And to do away with the multiple overdrives. 5th gear should be 1.0:1 & 6th the overdrive. They would just have to have a rev limiter, to avoid engine failure. My atv had this back in 2003 & it worked well. (when pulling the weight sled, 1st gear Lo range, take off slow, then hit the rev limiter & just back off a tiny bit & hold it there, in its best powerband. Yes lower gears will certainly help. But a simple trans computer program change would be a great start & lower gears with less gaps in between them would also go a long way.
...


I still don't understand your beef with the 5th and 6th overdrives. Perhaps if you had experience with the 6.4 with the 66RFE you would understand why it makes sense. Towing at interstate speeds, the truck will stay in 6th on the level and shift down to 5th on the steeper inclines. When it's just the truck, it pretty much stays in 6th. There's nothing wrong with multiple overdrives even with the 4.10 gears.

When I had the '13 Powerwagon with the 5.7, it was a different story, it didn't do very well towing even with the 4.56 gears. So I got rid of it and got the '14 with the 6.4.

I don't know anyone with a Powerwagon that regularly tows as heavy as I do...

I have a 16 PW and my trailer is about 8500 to 8800 max. I run 35s and stock 4.10s. Here is the trailer, pardon my old Duramax in the pic. Image

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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby Reloaderguy » Fri May 12, 2017 10:59 am

TwinStick wrote:He installed a 11.5" rear axle. :rockon:


The best year Power Wagon's come with 11.5" axles.
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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby Bill2014 » Fri May 12, 2017 11:56 am

nts007 wrote:
TwinStick wrote:F Forward 15 years & everyone will think they need a 1 ton dually with 1000hp to pull their 8800 lb trailer. :sick:


So I shouldn't twin turbo the wife's truck??? :lol: :lol:


Ummm - that kind of power is not required if you are geared low enough :D - but you should consider synchronized front and rear 2-speed axles so that you can split the gears. :lol: :lol:
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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby RustyPW » Fri May 12, 2017 2:55 pm

Reloaderguy wrote:
TwinStick wrote:He installed a 11.5" rear axle. :rockon:


The best year Power Wagon's come with 11.5" axles.

:doh:
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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby MikeKey » Fri May 12, 2017 3:51 pm

Reloaderguy wrote:
TwinStick wrote:He installed a 11.5" rear axle. :rockon:


The best year Power Wagon's come with 11.5" axles.



It's true. About the best years. :poke:


Pretty sure I am going to move to 4.88's and 37's this summer.
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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby Colibri » Fri May 12, 2017 5:56 pm

37's and 5.13's are like pb&j 4.88's are for 35's, they're a half measure for 37's. highway rpm is only a few hundred different between the two but performance is night and day. I have a truck on 37's with 5.13's and one on 37's with 4.88's Hands down go 5.13 for man tires
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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby Pit Slave » Fri May 12, 2017 8:23 pm

I want 5.32's and 39's

Yeah, I smoked 'em, sometimes you just gotta #sendit
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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby RustyPW » Sat May 13, 2017 4:43 pm

Pit Slave wrote:I want 5.32's and 39's

Yeah, I smoked 'em, sometimes you just gotta #sendit

Yeah............I want to run an Arrington 448ci crate engine, with 5.13's and 40" tires too. :cash: :cash: :cash: :cash: :cash: :cash: :cash: :cash: :cash:
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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby Rodeoflyer » Sat May 13, 2017 5:12 pm

If we're just wishing upon a Star here I want the SAIL mega truck.

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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby nts007 » Sat May 13, 2017 7:58 pm

I want my 06 powerwagon back

That's dreaming enough
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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby coder » Mon May 15, 2017 5:42 pm

4.10 to 4.65 would only be a small increase in drive-shaft rotation only 11% for every turn of the tires, you might not notice much if any difference for the relatively high cost of changing gears in both axles.
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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby MikeKey » Mon May 15, 2017 6:02 pm

Colibri wrote:37's and 5.13's are like pb&j 4.88's are for 35's, they're a half measure for 37's. highway rpm is only a few hundred different between the two but performance is night and day. I have a truck on 37's with 5.13's and one on 37's with 4.88's Hands down go 5.13 for man tires


Eh, I dunno about that math.

With the 35's now my 4:10's are about an effective ratio of 3.83, so 4.39 or 4:30's would put me closer to stock. And for a 37 inch tire 4.64:1 would be needed, making 4:88 a nice sweet spot on the low end of performance for RPM's around 2800 at about 65pmh. But the difference for a 5.13 is only 3028rpm at 65mph, so you might not be too far off on the recommendation.

But I don't think I'd want to tow from Florida to Idaho at 3000rpm all the time, I'd rather be under. So 4:88 I feel is a better effective gear ratio for normal daily use. And 5:13 might be ideal if you're using the truck more for play and less for work/transportation.

I dunno, just my opinion and that's not worth much. :cheers: Although I haven't done the crawl math if anyone wants to try that. I'd be interested to know.
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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby nts007 » Mon May 15, 2017 10:42 pm

Idk how crawl ratio would change. You're only adjusting the final ratio nothing else. So if you go up 20% in tire size then by increasing the gear ratio by 20% nets you the same final drive as factory. The whole idea is to stay at the factory tire to gear ratio. I went from 3.73's with 31" tires and with 4.56 gears and 37" tires I'm under driving by about 3% which isn't noticeable. So effectively I'm adding no extra stress to the rest of the driveline like tranny and tcase with oversized tires. Rpms stay the same as stock. That's the end goal. If you changed the gear and did not change the tire size then you would be affecting the final drive as you stated.
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Re: 4.10 to 4.56 axle ratio upgrade kit for 2015 PW?

Postby olyelr » Thu May 18, 2017 7:08 am

IMO, the 4.5 gens are geared to high from the factory. 4.10s and 33s just seems to slugish to me for normal daily driving/towing duty's with this bigass heavy truck. Thats why when it comes time for me to regear I will be going with a lower final drive ratio than stock. Not a ton lower, but certainly a little lower. Not to mention the fact that the tires will be heavier and have way less rolling resistance than the stock setup, which just makes it worse yet.
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