Due to a suspension lift the u-joint angles increases. After
approximately 5 degrees of angle on a u-joint, vibrations begin to be
noticeable. The higher the angle the higher the vibrations. All of the
Driveshaftsuperstore kits effectively reduce the angles close to stock without
reducing your lift thus, eliminating the vibrations. The kits vary in
application based on the vehicle use.
The Options that are offered for the following kits are HIGH
ANGLE, AND LONG SPLINES for an additional charge.
Also it is important to note that the Driveshaftsuperstore
offers several high angle CVs that can be used on any of the drive shafts that
come with the kits. How do you know which one to choose depends on the use of
the vehicle. Daily drivers normally will have to have performance CVs that are
made very precise and precision balanced. On the other hand, totally off
road vehicle can use the competition CVs which are bigger and have high strength
u-joints and components (Bad Boy Jr and the Bad Boy 80). In many case our
customers need both performance and strength in the off road and we use the PERF
45 degree CV to handle such needs. These CV are listed below.
1. Automotive 1310 half ton, 1330 three quarter ton, 1350 one ton with high
angle and long spline options.
2. The PERF (performance)
CV 2 ton CV 45 degrees 3000 ft-lbs to be used on angles of above 25
degrees on a daily driver. U-joints are bigger than 1410s but in only a 5"
diameter package that fits all trucks.
3. The Bad Boy Jr 2-ton CV 60 degrees for competition
(non-daily driver) vehicles like mud, rocks, etc. with long spline as an option.
4. The Bad Boy 2-ton CV 80 degrees for super high lift
vehicles 15 and up and is also a competition CV not a daily driver.
TIPS TO DISCOVERING YOUR NEEDS
Why the BIG Double Cardan
Torque rating decreases by the cosine of the angle to which the CV is
applied. The higher the angle the lower the torque rating,
so the CV must be BIGGER to compensate. The name of the game is "BIG"
when it comes to high angle. BIGGER means higher torque rating. At 30
degrees, there is nothing left for a 1310 or half ton CV at 1600 ft-lbs. It is
at it's maximum angle and it means it will break. On the other hand, a BIG CV
2ton with 3000 ft-lbs torque rating at 5 degrees, is used to operate at 30
degrees. This is cruising for this CV because it still has a good torque rating
and 15 to 30 degrees of flex remaining (depending on what BIG CV is used).
do I need a CV?
When the angle of a
single u-joint exceeds 5 degrees. Angles greater than this make the u-joint
do I need a high angle. Rules of thumb.
FRONT or REAR: Lifts
between 4 inches higher or when the angle at the transfer case output exceeds 10
degrees or when the vehicle is built for lots of articulation where the CV may
bind at full droop.
When do I need long
travel. Rules of thumb.
means twice the working travel available in the industy. We give you 7" instead
of 3.5 or there abouts and the longest we offer is 25"
When the extension (or travel) exceeds 2 inches or when you
have build you vehicle for high articulation or high movement of the
differentials like for rock crawling and other sports. Especially if you have
not installed traction bars to keep the axle from traveling straight downward.
How do I measure extension? Measure the distance between
the transfer case and the differential at ride height, and then lift the body
and let the wheels droop and measure again. The difference is your static
extension, add .5 inches more for dynamic conditions and that should be your
What is standard spline versus long spline? Answer: 3.5
inches total versus 7 inch total travel. We have up to 26 inches of travel
if you need it but it costs $40 for each additional 4 inches, just tell us on
the comments how much travel you want beyond the 7 inches of the our first cut