K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Mainshaft Extension and Oil Pump Housing
Remove (Figures 1 & 2)
1.
Rear extension housing bolts (3) and rear extension (4).
2.
Bearing retainer (snap ring) (5) from the mainshaft (19).
3.
Pump retainer housing bolts (7).
*
Pump retainer housing bolts are shouldered.
4.
Pump retainer housing (8) from the rear case half (17).
5.
Retainer (snap ring) (10), speedometer tone wheel (11) and remaining retainer (snap ring)
(10) from the mainshaft (19).
6.
Case bolts (3) from the case halves.
*
Note the two longer bolts and washers go into doweled case holes (33).
*
Separate case halves, insert screwdrivers into the slot cast in the case ends and pry apart. Do not attempt to wedge the case halves apart at any
point on the mating surfaces.
*
Be careful not to damage the oil pump (12) (located in the rear case half) while removing the rear case half (17).
Internal Components
Remove
Tools required:
J 8092 drive handle
J 33832 bearing installer and remover
1.
Fork shift spring (52).
2.
Retainer (snap ring) (23) from the front output shaft (21).
3.
Mainshaft (19)/drive sprocket (20), chain (58) and driven sprocket (22) as a unit. Mode shift fork (54) and shift rail (48) will be removed with the
mainshaft.
4.
Shift lever nut (63), washer (64), shift lever (65), plastic washer (66) and o-ring seal (67) from the front case half.
5.
Range shift fork (51), range shift hub (34) and sector with shaft (55) trom the planetary carrier (36).
*
It is necessary to rotate the sector with the shaft (55) to obtain clearance when removing the range fork (51).
6.
Input bearing retainer bolts (43) and input bearing retainer (44) from the front case half (45).
7.
Retainer snap ring (41) from the input gear (38).
8.
Planetary carrier (36) and the input gear (38) from the annulus gear (62) using a soft hammer.
9.
Input bearing retainer (39) and input bearing (40).
10.
Front output bearing retainer ring (snap ring) (60).
11.
Front output bearing (61) from the front case half (45) using J 33832, and J 8092.
12.
Seal (42) from the input bearing retainer (44) if it shows signs of damage.
Install
Tools required:
J 36371 bearing installer
J 36373 bearing installer
1.
New seal - P/N 14095609 (42) into retainer
