09/19/2026
One ton axle swaps have long been an awesome way to make your off road rig a more capable machine.
But, as the years have gone by, options have improved and so has availability for many different axle styles.
Offroaders are also demanding more from their builds, constantly pushing their rigs harder and harder
Especially among Jeepers, the topic of one ton axle swap candidates can be an exciting discussion, as well as a quick way to test "loyalty" between friends, lol!!!
Options and Opinions Abound
Let's look two options that are often compared against each other amongst many offroaders, and see whats up with all that heavy metal.
Its a long read, so grab a beverage or snack, get comfy and lets dive in......
AAM 14 BOLT VERSUS DANA 80!!!!
Let's begin with one of the most popular one ton axles to ever exist-
The AAM 14 Bolt, Full Float, Ribbed Housing, Single Rear Wheel, Disc Brakes
Made by American Axle Manufacturing, commonly used on 1999 to 2006 Chevrolet 2500HD/3500HD Trucks (dates approx)
10.5" diameter ring gear, with 12 mounting bolts, 1/2"-20 size
Gear ratios available: 3.21, 3.42, 3.73, 4.10, 4.56, 4.88, 5.13, 5.38
OEM Carrier break- 4.11 and numerically lower (series 3) with 4.56 and numerically higher (series 4) note- some aftermarket gear ratios available in "thick cut" ring gears, allowing for the numerically higher ratios (series 4) to be used on series 3 carriers.
Pinion Gear has a major root diameter of 1.750" and 30 splines, with a 1.5" pinion nut, crush sleeve for preload. Also features a pinion head journal, being supported by a third pinion bearing, straight roller type, drop out style pinion bearing support, as well as spanner nut style side adjusters for the differential carrier bearings/races.
Traction Devices Available-
Eaton Detroit Locker, ARB Air Locker, G80 Limited Slip, Mini-Spool, Full Spool, and more from other companies
Pinion Yoke available in 1350 or 1410 ujoint series, 30 spline
Axle Shafts- Full Float Style, 30 spline, 1.59" diameter at the splines, main root diameter is 1.35", 8 bolt fl**ge with 1/2" diameter hardware, 1541H or similar alloy steel, induction hardened, unique 37.5 degree pressure angle splines
Axle Tubes- normally found to be 3.375" diameter with variations of .375" to .500" wall thickness
Lowest Point of Housing Casting from Center Line of Housing is approx 6.5", but the housing can be "shaved" to gain as much as 1.75" higher clearance..... this requires significant modification to the housing casting, involving fabrication, welding and a special diff cover, as well as having the ring gear machined down to a 10" outside diameter.
WMS can vary, but the most common are 67 to 68 inches, and the hubs have an 8 x 6.5" lug pattern, with 9/16"-18 studs
Axle Assembly Weight- w/disc brakes, approx 475 to 500 pounds
Maximum Gross Axle Weight Rating-
8600 pounds
Maximum Peak/Momentary Torque Rating-
6242 lb-ft
Estimated Continuous Operating Torque-
Up to 2500 lb-ft
Maximum Recommend Tire Size-
Rock Crawling, Trail Riding, Mudding, Etc, 44"-47"
Competitive Rock Racing/Abuse, 40" to 42"
This particular version of the 14 Bolt is widely recognized as a very strong option for many different styles of off road rig....great aftermarket support, commonly available, and usually can be found for reasonable pricing.
Definitely a popular choice amongst many builders, and numerous steer axle versions have been produced, both as fully custom one-off's and as crate axle style.
Now, lets shift our focus, and visit the mighty
Dana 80!!!
For this discussion, we will specifically look at the SRW variant found under 1994 to 2002 Ram 2500/3500 Trucks, normally only available behind the trucks equipped with the 5.9L Cummins and 5 speed manual transmission. (There are also SRW versions found under certain Ford Trucks and Vans, as well as readily available crate axle options from several outfits, including Spicer Aftermarket)
Manufactured by Dana Spicer, and equipped with the factory drum brakes, this beast tips the scales at almost 600 pounds.
Ring Gear Diameter- 11.25", with 12 mounting bolts, 9/16"-18 sized
Gear Ratios Available- 3.31, 3.54, 3.73, 4.10, 4.30, 4.56, 4.63, 4.88, 5.13, 5.38
OEM Carrier break- 3.73 and numerically lower (series 3) with 4.10 and numerically higher (series 4) note- some aftermarket gear ratios available in "thick cut" ring gears, allowing for the numerically higher ratios (series 4) to be used on series 3 carriers.
Pinion Gear has a major root diameter of 2" and features 37 splines and a pinion nut that requires an 1 and 7/8 inch socket to remove and install. Preload is managed via shims.
Traction Devices Available,
ARB Air Locker, Eaton Detroit Locker, Eaton Trutrac, Eaton Tracloc, Full Spool and several other offerings from Powertrax, etc etc
Pinion Yokes available for 1350 and 1410 series ujoints, 37 spline
Axle Shafts-Full Float Style, 35 spline, 1.50" diameter at the splines, main root diameter is 1.50", 8 bolt fl**ge with 1/2" diameter hardware, 1541H or similar alloy steel, induction hardened, 30 degree pressure angle spline
Axle Tubes- 4" diameter, with wall thickness ranging from .375" to .500"
Lowest Point of Housing Casting from Center Line of Housing is approx 6.75", and the bottom of the housing can be clearanced to gain an additional half inch (approx) without major modifications or special parts.
WMS is 70 to 72 inches, depending on version, and the hubs have an 8 x 6.5" lug pattern, with 9/16"-18 studs
Maximum Gross Axle Weight Rating-
OEM Dodge/Ram spec, 8250 pounds
Dana Spicer spec, 11000 pounds
Maximum Peak/Momentary Torque Rating-
10000 lb-ft
Estimated Continuous Operating Torque-
2500 lb-ft
Maximum Recommend Tire Size-
Rock Crawling, Trail Riding, Mudding, Etc- 45"-47"
Competitive Rock Racing/Abuse- 43" to 44"
The Dana 80 enjoys a long standing and well deserved reputation for being a VERY strong axle assembly. While not as common to find as the 14 bolt, the SRW D80s are out there, and can be found for reasonable prices, depending on condition.
Being a Dana Spicer unit, the factory and Aftermarket support for this axle is very good. Yes, its a BIG axle, its a HEAVY axle, but it also brings massive strength to the table. Can also be used to build custom steer axles.
Strength equals more trail time and fewer break downs, more fun and less worry.
The numbers dont lie, pound for pound, in OEM configuration, the D80 surpasses the 14 Bolt on every level-
except for one!
Ease of repair and upgrade....
The 14 Bolt wins in that category, hands down
The D80 is designed in typical Dana Spicer fashion, making the set up and repair a more difficult task, when compared to the 14 Bolt....
This particular observation is VERY important for wheelers that are facing trail repairs!
Now, there are undoubtedly several of you chomping at the bit to disagree with me, especially with my tire size recommendations......
Variences will arise, based on vehicle configuration and such......driving style and terrain differences, etc.....
But just remember, we are comparing OEM style axles, unmodified and not upgraded....
my recommendations are not "gospel"
Just as the maximum peak torque numbers mentioned above refer to the ring and pinion's ability to resist failure, per the manufacturers, and are not necessarily based on any other individual component within each assembly, like an axle shaft or single bearing.....
Maximum Peak Momentary Torque is another way of saying "shock loading"......a neutral drop from 5000 RPM, a tire off the ground spinning at 50 mph suddenly grabbing traction, etc etc
I have owned and run both, on several different rigs over the years....service trucks, mud toys, rock crawlers...I have also repaired, upgraded and modified numerous examples of both axles over the years for customers and friends....
They are both amazing platforms, and both have their pros and cons
Cost and scarcity are key factors for alot of folks....available aftermarket options, overall ground clearance achievable, etc etc
Unfortunately, misinformation also sadly plays a large role, especially in the one ton jeep communities..the uneducated on this topic just love to regurgitate what they have heard around a campfire or read online
..some of my favorite lines are the ones like,
"the third pinion bearing in the 14 Bolt helps prevent ring gear deflection"
"The D80 is just a D70 with a bigger ring gear"
"14 Bolts are indestructible, just ask Cousin Ronnie"
And this timeless gem,
"the D80 is a boat anchor compared to a 14 bolt"
Opinions will always vary amongst the folks that dont have any real world experiences with these axles, and thats okay....fan boy's will too.....lol
But, the people that know better make their pick based on which platform best suits their needs, not because of social media peanut galleries or some infoolencer.....helps immensely to do your homework before going online and arguing with stangers, lol.....
But, I digress
At the end of the day, my vote goes to the D80....its just pure beef, right off the shelf.....they dont need much to be made even stronger than they already come, and I sincerely enjoy the confidence of having axles under my rig that I dont have to worry about breaking all the time for my style of wheeling and the trails I enjoy running.
Unlike many folks, I dont trailer my rig....its normally my daily ride, and I drive it to and from the trail....she is definitely not babied offroad, lol
Make no mistake, the 14 Bolt is still a badass axle in my book, and would honestly be my next choice, if the D80 wasnt an option.
They are both great axles, both offer sincere performance capabilities......but the D80 is the stronger option of the two, without a doubt, in stock configuration.
And we still haven't gotten into what upgrades are out there for both of these beasts!!
If you really wanna get into the thick of things, we can venture into the sincere aftermarket for both axles, as there are MANY ways to make them both much stronger than they come from the manufacturer.....the only limits are your imagination and your wallet......
We will dive into that next time, I think
Thanks for taking the time to read this far, see ya on the next one!!!!
