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1. Remove 5 bolts and remove gear selector lever case. |
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2. Next remove 4wd switch and take out steel
ball. |
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3. Remove bolts fastening center case and middle
case halves together. |
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4. Next, use large slotted screwdriver or
similar object to lightly pry case halves apart. Check shift rods for any binding that may
occur during this step. Pry the case apart by hand after checking shift rods. |
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5. Remove counter gear from case by sliding gear
off of shaft.
Remove needle bearings, spacer, shaft, and thrust washer from case. |
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6. On the top of transfer case, loosen gear
shift locating spring plug and take out spring and locating ball. It is helpful to use a
small pointed object such as a center punch or ball point pen to remove these items. Spray
carb cleaner or similar liquid into the hole to loosen these items. |
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7. Place your thumb or finger over the opening
before rotating the shift fork rod as shown. Remove the spring and check ball from the
opening. Use caution as the spring and ball will come out rapidly when the fork is
rotated. |
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8. Remove the bolt that loads the select lever.
Dump out the check ball from the small opening. |
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9. Using a punch, drive spring pin out of
reduction shift yoke. |
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10. After pin is removed, remove reduction shift
yoke. |
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11. After removal of yoke, slide shift rail,
fork, and clutch sleeve out of case assembly. |
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12.Remove cir clip and then remove clutch hub
from main output shaft. |
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13.Remove the reduction clutch hub from the main
shaft. |
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14.Remove low output gear and bearing from main
shaft. |
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15. Removal of case material is required to
install the new larger diameter low output gear. This area of the case is tapered and gets
thicker in diameter towards the interior of the case. The total amount of material removed
will be .080 -.120 (less than 1/8) This is completed simply by using the
sharp edge of a metal file. By sliding the gear and inner bearing assembled onto the shaft
into the case, you can gauge the proper amount to be removed. Remember, the required area
of material removal is only the width of the gear face. Be sure to measure from the inside
of the case wall outward. Be sure that the installed gear spins freely after removal of
material. Remember the old adage: Measure twice and cut once. Remove ALL metal shavings
from inside of case before reassembly. This operation should take 15-20 minutes total. |
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16. After case wall has been indexed, reassemble
low output gear and bearing and check case wall clearance. |
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Assembly
17.Re-install the reduction clutch hub onto
the main shaft. |
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18. Re-install the reduction clutch hub retainer
clip. |
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19. Re-install shift rail and fork into case. Do
not forget to install drive clutch sleeve over clutch hub.
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20. Re-install reduction yoke on the end of shift rail |
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21. Using a punch, drive spring pin back into
reduction shift yoke. |
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22.Re-install the spring and check ball in the
opening in the case and re-install bolt. |
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23. Remove
counter shaft lock plate bolt and plate. |
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24. Remove input shaft retainer clip from rear
case. |
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25. After removing the bearing retainer, press
input shaft out of case. |
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26. Remove bearing retainer clip from input
shaft . |
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27. Remove bearing from input shaft using a
bearing splitter |
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28. Press bearing on to new input shaft |
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29. Re-install clip onto input shaft |
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30. Press input shaft into case. |
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31. After pressing input shaft back into case,
re-install input shaft bearing retainer clip. |
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32. After installing input shaft in rear case,
install new counter gear shaft onto rear
case. Slide the gear shaft into the case from the back side as shown. |
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33. Insert the shaft through the thrust washer,
then counter gear as shown. |
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34. Install counter shaft needle bearings and
spacer. |
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35. Pre-lube the counter gear needle bearings
with a squirt of the supplied gear oil. This will allow you to spin the gears freely
during final assembly of case halves. |
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36. IMPORTANT! You have now reached one of the
trickiest and most critical steps in this installation. Before the installation of the
counter gear into the rear case halve is complete, you must have properly inserted the
thrust washer lock ball into the counter shaft. This procedure is opposite, not just the
reverse of the stock assembly procedure. If it is not correctly and fully inserted into
the shaft, the thrust washer will rotate against the aluminum case and cause major damage
to the thrust washer and case surface. The following steps should be followed very
carefully. |
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37. Insert the thrust washer lock ball using a
punch or piece of 1/4 rod. Use a dab of grease on the end of the rod to hold the
ball. |
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38. The thrust washer is now sitting between the
case and counter gear on the shaft. The lock ball must be inserted to keep the thrust
washer staked to the shaft against the case. The counter gear will slide out away from the
case far enough to allow you to slide the rod with the ball attached between the case and
gear. Insert the ball into the slot and be completely sure that the lock ball is inserted
completely and that the thrust washer cant rotate against the case. |
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39. After the thrust washer and lock ball are
correctly located, push the counter shaft as far as possible through the case and install
counter shaft lock plate. Torque to 20.0 ft. Lbs. |
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40. After locking tab is installed to shaft, lay
case flat and install thrust washer lock ball on opposite end of shaft. |
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41. Re-install thrust washer over
counter gear shaft and onto lock ball. |
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42. Re-install needle bearing into end of input
shaft. Grease thoroughly. Apply gasket sealer to both case halves before assembly. No
paper gasket is used or available. |
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43. Level the rear case halve up on blocks and
drop main case into position. |
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44. Check that the re-assembled case is sealed
all around. Check for nicked or torn seals. Torque case bolts to 20.0 ft. Lbs. |
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45. Re-install gear shift lever case. Torque to
10.0 ft lbs. |
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46. Re-install 4wd switch lead plugs into output
end of case. Refer to factory manual for reinstallation procedure of transfer case into
vehicle, and fill with gear oil before starting the vehicle. |