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

Mega Short Slip Yoke Eliminator Kit
For NP231
Part Number:
18676.72
The 18676.72 kit has been designed to work with all Wranglers and XJ Cherokees with
an electronic speedometer and a factory installed NP231-J transfer case. Any vehicle
manufactured prior to 1992 will need to be retro fitted with an electronic speedometer
(will not work with cable driven speedometers) – Not Available through OMIX-ADA
or Rugged Ridge.
APPLICATION NOTES:
(1) Some early NP231 produced from 1987 – 1990 have the vacuum switch for the front axle
disconnect located in the rear output shaft housing. This kit is supplied with a new housing
that does not allow for the vacuum switch to be reused for this applications. It will be
necessary to purchase a cable operated disconnect manufactured by 4x4 Posi-Lock or
replace the front passenger side axles with later solid axle shafts.
(2) Some 1998 and older model Jeeps will have a different three wire connecter than what is
supplied with this kit. If this is the case you will need to hard wire the leads to eliminate the
connector all together. Wire color codes and instructions are included later in the
instructions
(3) This kit will not work on 2007 and newer JK’s
(4) This kit will not work on TJ Rubicon’s or Rubicon Unlimited.
(5) Proper calibration of speedometer may be needed after installation. See chart supplied with
instructions for further information.
The purpose of this kit is to replace the slip yoke portion of the NP231 with a fixed-yoke, CV-style drive
shaft assembly. A CV equipped drive shaft will be required with this conversion kit. The stock drive shaft
can be modified to work. Proper length and balance are critical. High –quality drive shafts in the required
lengths and configurations are available to compliment this kit for many applications.
The easiest way to install this kit is to remove the transfer case from your Jeep. Removal is not necessary,
but usually is much quicker and easier and highly recommended. The installation of this kit requires
almost total disassembly of your transfer case. At the end of the instruction packet you will find a complete
listing of replacement parts available from OMIX-ADA for your NP231J transfer case. All parts are
available through the retailer this kit was purchased from.
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