Automatic Transmission - GMC T Series 1994 Repair Manual

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Clean
1. Bearings.
2. Shafts.
3. Sprockets.
4. Chain.
5. Oil feed ports and channels. Apply compressed air
to each oil feed port and channel in order to
remove any obstructions or cleaning solvent resi­
due.
Inspect
1. Bearings and thrust washers for wear, spalling,
brinelling, or corrosion.
Tools Required:
J 7079-2 Driver Handle
J 38212 Needle Bearing Installer
J 38423 Front Output Shaft Front Bearing Installer
J 8092 Driver Handle
During assembly of the transfer case, lube all neces­
sary parts with Dexron® II E Automatic Transmission
Fluid or (GM P\N 9985286).
* Assemble (Figures 12 through 17)
1. Viscous clutch (20), drive sprocket (17), drive
sprocket spacer (16), and the sun gear shaft bear­
ing (33) onto the sun gear shaft (18) (figure 12).
2. Input shaft pilot bearing (38) into the output shaft
assembly (24) using J 7079-2 and J 38212 (figure
13).
3. Output shaft assembly (24) to the gear ring (30).
4. Gear ring snap ring (29) to the gear ring (30) (fig­
ure 14).
5. Output shaft bearing (35) to the front cover (11)
using J 8092 and J 38423.
6. Output shaft bearing snap ring (34) to the front
cover (11) (figure 16).
7. Output shaft rear bearing (39) to the rear case half
(10) using J 7079-2 and J 38212 (figure 17).
Install or Connect (Figures 4 and 18 through 25)
N O T IC E : F o r s t e p s 4, 5, 18, a n d 2 2 , r e f e r to
" N o t i c e " o n p a g e 7 D 5 -1 .
Tools Required:
J 37668 Seal Installer
J 38216 Seal Installer
1. Output shaft assembly (24) and gear ring (30)
through the rear case half (10).
2. Output shaft bearing snap ring (27) to the output
shaft bearing (28) (figure 18).
CLEANING AND INSPECTION
ASSEMBLY
2. Gear teeth for excessive wear or damage, spalling,
cracks, or corrosion.
3. Gear splines for excessive wear, spalling, cracks,
twist, or corrosion.
4. Shaft splines for excessive wear, spalling, cracks,
distortion, or corrosion.
5. Case half for damaged or warped mating surfaces,
cracks, porosity, or damaged thread holes.
6. Oil scoop on the output shaft assembly for cracks,
wear, or damage.
7. Speedometer tone wheel (37) for wear, spalling,
cracks, twist, and corrosion.
8. Speed sensor and the breather assembly O-ring
seals for cuts, tears, cracks, or damage.
3. Apply an 1/8-inch bead of RTV sealer (GM P/N
1052366) or equivalent to the rear case half (10)
extension housing sealing surface.
4. Extension housing (8) and the extension housing
bolts (25) to the rear case half (10).
16. Drive Sprocket Spacer
17. Drive Sprocket
18. Sun Gear Shaft
20. Viscous Clutch
33. Sun Gear Shaft Bearing
17
20
F7603