Rugged Ridge NP231 Mega Short Slip Yoke Eliminator (SYE) Kit with Speed Sensor - Manual (Page 7)

Installation Instructions: 18676.72
Drive shaft modifications to Original Unit.
The modification of your drive shaft should be performed by a local driveline repair shop
that is capable of balancing your finished assembly.
Note: Use a C.V. joint & a long slip spline style shaft assembly to avoid problems
with lifted vehicles
.
If you wish to have a custom driveshaft fabricated you will need to get your new
driveshaft measurement length. Use the measurement procedures listed in step #18.
Note: for proper C.V. type drive shaft operations, the rear differential
yoke should be pointing at the transfer case output yoke. This should be
checked under normal driving conditions and load
STEP 19: - Speedometer Calibration Data
Proper calibration of the speedometer will greatly depend on what changes have been
made to the axle gear ratio and tire size. There are some combinations that will not
require calibration changes (refer to the chart below) and are shown in the color gray.
The other data reflects what your speedometer percentage of error will be if the
speedometer is not recalibrated. If your vehicle requires recalibration a converter box can
be purchase. (Not Available from Omix-Ada – Rugged Ridge).
Pg.7