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52. Install sixth gear friction ring (1) on stop ring (2).
53. Install 5-6 synchronizer hub (1) on sixth gear syn-
chronizer rings (2).
54. Heat mainshaft bearing (1) on bearing heater to a
maximum of 177 Celsius (350° Fahrenheit).
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55. Using welding gloves or tongs, install mainshaft
bearing (1) on mainshaft.
56. Install mainshaft bearing (1) snap ring (2).
57. Install 5-6 synchronizer sleeve (1) on hub (2) and
push sleeve to the bottom of the hub.
58. Install 5-6 synchronizer detents and springs (1)
into synchronizer hub (2) slots. Then push detents
behind synchronizer sleeve (3).
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59. Install fifth gear friction ring (1) onto hub (2).
60. Install fifth gear blocker ring with teeth pointing
down (1) onto hub (2).
61. Hold fifth gear blocker ring (1) onto hub (2) and
center 5-6 synchronizer sleeve on hub (2).
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REAR HOUSING
1. Install countershaft bearing cup with Installer 9589
(1) and Handle C-4171 (2).
2. Install mainshaft bearing cup with Installer 9588 (1)
and Handle C-4171 (2).
3. Install output shaft seal with Installer 9598.
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4. Install reverse idler bearing (1) into idler gear (2).
5. Install idler gear (1) into rear housing (2) off to the
side. For mainshaft/countershaft installation
clearance.
6. Tie strap (2) shift rails (1) together.
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7. Install reverse (1), 1-2 (2) and 3-4 (3) shift rails and
forks as and assembly on synchronizer sleeves.
8. Install mainshaft with shift rails (2) into the rear
housing. Tilt the mainshaft then tilt the countershaft
(1) into the housing.
9. Position first/reverse oil slinger (1) between the
mainshaft first (2) and reverse gears, then
straighten the shafts in the housing.
CAUTION: Oil slinger is fragile and can crack dur-
ing installation. Failure to follow these instructions
will result in cracking the oil slinger and lack of oil
to first/reverse bearing.
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10. Position reverse idler gear and install idler shaft
(2) with bolt (1).
11. Install reverse idler gear shaft pin (1) into rear
housing (2) and tighten to 58 Nꞏm (43 ft. lbs.).
12. Install 5-6 shift shoe narrow ends (1) into the 5-6
synchronizer sleeves (2).
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13. Install 5-6 shift fork (1) into the shift rail.
FRONT HOUSING
CAUTION: If mainshaft/bearings or countershaft/
bearings are replaced endplay measurements,
must taken to ensure proper bearing preload. Fail-
ure to follow these instruction will result in bear-
ing damage.
1. Install input shaft seal front housing bore (1) with
Installer 9595 (2).