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Old 08-09-2017, 11:15 AM
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Best axle shafts?

Currently converting my 28 spline ford 9" axle to a 31 spline with detroit locker. I want the strongest shafts I can find and ECGS seems to have a very reasonable price with a lifetime warranty. I want the strongest shafts I can find so I can minimize snapping a shaft and destroying my locker.
Any opinions on the strongest shafts?
Ford 9" Chromoly Shafts

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Old 08-09-2017, 11:50 AM   #2
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From my experience building and beating the holy crap out of the 9". 1541H axles are better than chromos, this is what I used on all the 9's I built.

Yukon 1541H Alloy Rear Axle for Ford 9" ('77 and newer)

Tried chromos the first couple of times and they would snap rather easily in hardcore rock crawling. The 1541H would outlast the chromo every time.

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Old 08-09-2017, 11:55 AM
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Originally Posted by mudbug85603 View Post
From my experience building and beating the holy crap out of the 9". 1541H axles are better than chromos, this is what I used on all the 9's I built.

Yukon 1541H Alloy Rear Axle for Ford 9" ('77 and newer)

Tried chromos in the first couple and they would snap rather easily in hardcore rock crawling. The 1541H would outlast the chromo every time.
Great! I just need to find either the correct shaft length or some cut to fit ones for my 9" out of a 1973 Torino.
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Old 08-09-2017, 12:04 PM   #4
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Old 08-09-2017, 12:26 PM   #5
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Originally Posted by mudbug85603 View Post
From my experience building and beating the holy crap out of the 9". 1541H axles are better than chromos, this is what I used on all the 9's I built.

Yukon 1541H Alloy Rear Axle for Ford 9" ('77 and newer)

Tried chromos the first couple of times and they would snap rather easily in hardcore rock crawling. The 1541H would outlast the chromo every time.
Here's a very good thread on the misconceptions so common between good quality 4340 chromoly shafts like from Revolution Gear vs. some of the other "4340" shafts and 1541.

4340, 300M, 1541H, why? - Pirate4x4.Com : 4x4 and Off-Road Forum

One more at http://www.fourwheeler.com/how-to/tr...nder-pressure/

And one more at http://www.dutchmanaxles.com/axle-tech

Personally I made a conscious decision to go with a good quality US made 4340 axle shafts... Superior Axle Evolutions up front (no longer available), Revolution Gear & Axle in the rear.
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Old 08-09-2017, 12:39 PM   #6
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To each his own, I speak from actual experience with the Ford 9" running chromo and 1541H. In fullsize rigs that weighed twice as much as a TJ running a minimum of 400HP with 35" or bigger tires(usually 38's) in the Arizona desert.

You're running what Jerry a Jeep 44/30 or 44/44 combo?
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Old 08-09-2017, 12:58 PM   #7
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Originally Posted by mudbug85603 View Post
To each his own, I speak from actual experience with the Ford 9" running chromo and 1541H. In fullsize rigs that weighed twice as much as a TJ running a minimum of 400HP with 35" or bigger tires(usually 38's) in the Arizona desert.

You're running what Jerry a Jeep 44/30 or 44/44 combo?
The data in those and many other similar articles speaks for itself, it's not really debatable. You won't find anything from an axle builder or reference guide to agree with your claim good quality 1541H is stronger than good quality 4340 chromoly. I run a pair of 44's.
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Old 08-09-2017, 01:06 PM   #8
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The data in those and many other similar articles speaks for itself, it's not really debatable. You won't find anything from an axle builder or reference guide to agree with your claim good quality 1541H is stronger than good quality 4340 chromoly. I run a pair of 44's.
What makes it debatable is the fact that I have actual experience and you are quoting internet articles.

I'm done, let the OP decide
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Old 08-09-2017, 01:09 PM   #9
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Originally Posted by mudbug85603 View Post
What makes it debatable is the fact that I have actual experience and you are quoting internet articles.
Alright, post something out of a hardbound reference book or any other trustworthy source that shows 1541H is stronger than 4340. Post your data, I posted the data I found.
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Old 08-09-2017, 01:20 PM   #10
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Never, did I say 1541H was stronger than 4340. What I said is that in those particular applications 1541H would outlast 4340. To go beyond that and explain why, couldn't say and don't care. Experience from actual use is worth more than a 1000 words.
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Old 08-09-2017, 02:31 PM
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So would ECGS be considered a quality 4340 axle? They have really great pricing even with the additional bearings and studs. I find it impossible to find axles for a Torino 9" so it seems like I may need to opt for the cut to fit ones.
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Old 08-09-2017, 02:51 PM   #12
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Originally Posted by mudbug85603 View Post
... Experience from actual use is worth more than a 1000 words.
I've been running aftermarket 4340 shafts since 2003 after breaking a front OE axle shaft. First 4340's were Warn shafts (bought out by Randy's) up front, followed by Superior Axle Evolutions in the rear Dana 44 in my previous TJ. I'm now running a combination of front Dana 44 Superior Axle 4340 Evolutions with CTM u-joints and rear Dana 44 Revolution Gear 4340 axle shafts. Never broke any of them on any of my SOCAL rock crawling trails.

Garrett, I'd certainly give ECGS a call about their 4340 shafts. They've been around a long time.
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Old 08-09-2017, 08:43 PM   #13
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I went with the ECGS 4340 with lifetime warranty. Talking to the tech guys there they are really proud of and stand behind their stuff. Time will tell
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Old 08-10-2017, 05:45 AM   #14
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I found these I used to refer to helping me make my shaft choice.. maybe they'll help
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Old 08-10-2017, 10:27 AM   #15
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Originally Posted by Jerry Bransford View Post
And one more at Tech Info

Personally I made a conscious decision to go with a good quality US made 4340 axle shafts... Superior Axle Evolutions up front (no longer available), Revolution Gear & Axle in the rear.
From the article: "4340 vs. 1541-H. 4340 has more tensile strength than 1541-H, will take more twisting forces, but cannot take bending forces as well as 1541-H. Flanged axles are overhung beyond the wheel bearing and are subject to these bending forces-especially in the world of wider and/or larger diameter tires. The hard case and soft core design of a 1541-H flanged axle enable the shaft to bend, flex, and spring back. Properly executed, both 4340 "thru hardened" and an upgraded 1541-H "induction hardened" shaft can achieve nearly the same results in strength in the area of torsional strength (twist forces), but the design of an induction hardened shaft usually yields more bending (life) cycles than a thru hardened 4340 shaft. 4340 is more expensive than 1541-H, thus is reserved for the front shafts only which need the heat treated U-Joint ears for strength reasons."

So what is the bottom line interpretation of this particular statement? Chromoly twists better, 1541 bends better, what does that mean when wheeling? Is one clearly better than the other, is it 6 of one half dozen of another? It sounds like they're roughly equal with 1541 having a longer potential life? Does anyone even know?
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Old 08-10-2017, 11:08 AM   #16
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Just put a set of 2.5 ton Rockwells on it and be done with it. lol
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Old 08-10-2017, 11:42 AM   #17
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So would ECGS be considered a quality 4340 axle? They have really great pricing even with the additional bearings and studs. I find it impossible to find axles for a Torino 9" so it seems like I may need to opt for the cut to fit ones.
ECGS axle shafts are Yukon shafts, they remove the Yukon sticker from the center of the flange but leave the Yukon tag with part numbers twist tied to the flange. You will also get Yukon wheel studs in the original package included with the shafts. If anyone needs verification of that, call ECGS

Garret have you called the folks at ECGS? Bet they can set you up with what you need. While you're on the phone with them be sure to ask them about the differences of 1541H and 4340 for the 9". You might be surprised at what they may suggest. Have never known them to suggest a higher priced part over a better part for the application. Because their reputation is more important to them than emptying the customer wallet.

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Old 08-10-2017, 12:28 PM   #18
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From the article: "4340 vs. 1541-H. 4340 has more tensile strength than 1541-H, will take more twisting forces, but cannot take bending forces as well as 1541-H. Flanged axles are overhung beyond the wheel bearing and are subject to these bending forces-especially in the world of wider and/or larger diameter tires. The hard case and soft core design of a 1541-H flanged axle enable the shaft to bend, flex, and spring back. Properly executed, both 4340 "thru hardened" and an upgraded 1541-H "induction hardened" shaft can achieve nearly the same results in strength in the area of torsional strength (twist forces), but the design of an induction hardened shaft usually yields more bending (life) cycles than a thru hardened 4340 shaft. 4340 is more expensive than 1541-H, thus is reserved for the front shafts only which need the heat treated U-Joint ears for strength reasons."

1541H shafts are also better for housings like the D35 and other c-clip style diffs. The case hardening used on 1541H shafts creates a harder surface that's needed for bearing races. The through hardened axles (4340) tend to wear grooves in the shaft itself at the outer bearing. Which will lead to an early failure of the bearing from excessive play.
So what is the bottom line interpretation of this particular statement? Chromoly twists better, 1541 bends better, what does that mean when wheeling? Is one clearly better than the other, is it 6 of one half dozen of another? It sounds like they're roughly equal with 1541 having a longer potential life? Does anyone even know?
Not that any of what I'm about to write has anything to do with shaft selection for a 9".

Also 1541H shafts are better for housings like the D35 and other c-clip style diffs. The case hardening used on 1541H creates a harder outer surface needed for bearing races. The through hardened (4340) will have a softer outer surface that will wear grooves where the outer bearing rides creating more bearing play and lead to early failure.

Which is why it's getting more difficult to find chromoly shafts for the c-clip housings.

Even the highly recommended Revolution S35 kit, that so many mention chromoly shafts and that kit in the same breath is only available with 1541H shafts.
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Old 08-10-2017, 12:51 PM
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ECGS axle shafts are Yukon shafts, they remove the Yukon sticker from the center of the flange but leave the Yukon tag with part numbers twist tied to the flange. You will also get Yukon wheel studs in the original package included with the shafts. If anyone needs verification of that, call ECGS

Garret have you called the folks at ECGS? Bet they can set you up with what you need. While you're on the phone with them be sure to ask them about the differences of 1541H and 4340 for the 9". You might be surprised at what they may suggest. Have never known them to suggest a higher priced part over a better part for the application. Because their reputation is more important to them than emptying the customer wallet.

919-672-2705 Mon-Fri 8AM to 6PM EST
I haven't called them yet but will before ordering. I plan on ordering shafts the same time I order the locker and gears.
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Old 08-10-2017, 02:30 PM   #20
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Also 1541H shafts are better for housings like the D35 and other c-clip style diffs. The case hardening used on 1541H creates a harder outer surface needed for bearing races. The through hardened (4340) will have a softer outer surface that will wear grooves where the outer bearing rides creating more bearing play and lead to early failure.
I'll be testing that theory (again) this weekend at Anthracite in Coal Township PA

Ever since the build I've been unable to stay out of the mountains
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Old 08-10-2017, 04:08 PM   #21
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My jeep was built before I bought it. But the axles are Yukons and the gears are G2s. I know I found the receipts in the owners manual. Its an almost 20 years old Jeep with recipts for EVERYTHING
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Old 08-10-2017, 04:11 PM   #22
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Just put a set of 2.5 ton Rockwells on it and be done with it. lol
There is a guy Locally here selling Rockwell Axles. I considered a set for my TJ but I need a whole lot more motor for them. LOL Like a 6.7 Cummins. LOL
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Old 08-10-2017, 04:57 PM   #23
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hell got rockwells pair for 2k and d60 kingpins bout 1200 up here if u guys lookin to get big

1541 is better than OE, its dif mix of metals and hardens bit deeper, for appilications where some flex is desired. it will survive more bend cycles than chromy
4340 is through hardened and rock hard not good for flexing situations (hence all the trusses and tubes)
that's what I take from it all

my rig has a rigid axle and is designed to stay that way so flex within is not/should not be a factor
now johnny street racer prob wouldn't get much life outta 4340, he needs it to flex/ twist and return multiple times he wants 1541

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