Chrome Moly Front Axle Shafts
We carry a wide variety of Yukon 4340 axle shafts and kits!
We have all kinds of individual shafts as well as axle kits,
complete with both 4340 chromoly inners, both 4340 chromoly stub
shafts and a pair of Spicer universal joints or the Yukon Super
Joints. Keep in mind that full kits are cheaper than
buying the parts individually!
We can also do custom length
Dutchman 4340 shafts in import or domestic 4340!
We can also supply you with super
strong CTM 300M alloy u-joints for your new HD chromoly shafts.
These super strong joints are precision machined top quality joints that are easily
rebuilt for a lifetime of service.
CTM D44 size joint: $238.00/each.
All these axle
shafts are forged and machined from high strength 4340
chromium-molybdenum alloy ("chrome moly") to create the
strongest front axle option available for 1/2 and 3/4T front
ends. They don't have the strength reducing taper near the
splines like the factory shafts and the stub shafts are the
largest possible diameter for the full length.
extra material and the high strength alloy make these axles much
stronger than stock. The u-joint ears are thicker than stock,
specially heat treated, and cut for full circle snap rings to
help eliminate failures in this area.
These axles use the factory size u-joint from the '73
and up model years. It's a Spicer 297 or comparable
size. We've found the Spicer brand joints to be the best
available, and we carry them in greasable and non-greasable
If we ship the shafts without the u-joint installed,
you will need to press the joint in. The installation is
a little different than usual just because of the full
circle snaprings. You have to slide the snaprings over
the cross before you put the cross in the yoke, then
press in the cups and put the rings in the grooves.
28 vs. 30 Spline:
Most stock GM 10 bolt front axles are 28 spline.
Some Blazers and Suburbans from 89-91 may have factory
30 spline front ends. The most common way to get a
30 spline front is to swap a 30 spline rear differential
in the front housing. We can supply the shafts
with 30 splines on the diff end, and cut with the
correct pressure angles to match the GM diff. However,
the 28 spline axles are enough stronger than the 297
u-joint that they will not break. Retaining the 28
spline diff leaves you with the ability to run common
factory axles for spares. The only real advantage
to the 30 spline axles is if you run a
much stronger ujoint, the 30 spline could have a real
strength advantage over the 28 spline.
Non Stock or Custom Applications:
We can get the HD shafts for just about any D44 or 10
solid front axle. We commonly work with the early
Broncos, pre-73 GM's, and cut down full size axles.
The details we need to be able to work with you on
custom shafts are the length of the shafts from the end
of the splines to the center of the u-joint, and any
application info you can give us. If you are
starting a custom axle housing, call us for info on
available lengths of shafts. If you can use a
stock axle shaft, it could save you hundreds of dollars
in custom work!
Warranty will very by manufacturer but in general
they're warrantied for defects in materials and
workmanship with no problems.
broken axle assembly we've ever seen: Note the break at the
neck, missing ujoint cap, AND twisted splines. This is a lot
of hard use all added up. Thanks to Steve Frisbie for
providing us with a good example of breakage, and a chance
to test our on trail axle swapping skills.
Extreme Applications: We've had (and seen) good
results with these shafts under hard use in full-sizes
running up to 37" tires. Anything more than this, and you
should expect to break parts more often. Talented
drivers may make 38's work, but that's
really about it for hard 'wheeling. Some wheelers make
good use of the 1/2T axles in muddy terrain with larger
tires, but adding rocks to the mix brings you back to the
limit of about 36-38".
That 297 u-joint just isn't up to extreme use in heavy
vehicles with large (38"+) tires. You will break far
less than if you use factory axles though. These
shafts will eliminate shaft failures, and the u-joint area
holds up much better with the stiffer, stronger material
around the joint. We strongly recommend frequent
u-joint changes if you use your vehicle hard with a factory
type joint. A CTM joint is highly recommended for
category you would like more information on.