Rugged Ridge NP231 Slip Yoke Eliminator (SYE) Kit, 88-06 Jeep Wrangler - Manual (Page 5)

Photo 4. NP231 after completion of the first 9 steps. The rear case half is now ready to
be installed.
STEP 11: Make sure all parts are clean and ready to install. Be sure the oil pump and
pick up tube are properly located. Use RTV sealant ( OEM P/N: 82300234) on the case
halves. A good seal will prevent oil leaks. Slide the rear case half on and into position.
Do not force the case together . The mode fork shift rail needs to extend through the
rear case half . Install all the bolts in their proper locations and torque to 20-25 ft/lbs.
Reinstall the selector lever.
STEP 12: Install speedometer drive gear snap ring in the groove on the shaft near the
pump. Next install the speedo drive gear, and then the second snap ring.
STEP 13: IMPORTANT!!! Some Cherokees use a vacuum actuator on the rear output
housing that attaches to the mode fork shift rail. Check your old housing for the vacuum
actuator. A fitting is provided for it on the new output housing. On most Jeeps the
fitting will not be used. A plug with a seal has been provided. On some other transfer
cases the shift rail may need to be shortened. Determine the steps required by shifting the
transfer case while observing the mode fork shift rail. Find the position where the rail
protrudes the farthest out of the case. Test fit the rear output housing on the rear case
half. Be sure to index and align the pump outer tabs with the housing. Interference
between the shift rail and the housing will indicate whether or not you need to trim the
shift rail.
STEP 14: Prelube bearing and seal and install them into the rear output housing. Be
sure to install the bearing-retaining ring into the housing.
STEP 15: Apply RTV sealant to rear output housing. Be sure to support the main shaft
and index the pump outer tabs while aligning and installing the rear output assembly.
You can gently pull back on the output shaft to seat it against the rear bearing. Install the
rear output housing bolts and torque to 20-25 ft/lbs.
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