GMC T Series 1994 Repair Manual page 842

Disassemble
❖
• Mark the location of the synchronizer hub and
sleeve to aid in assembly. Synchronizer teeth must
align with struts (30).
1. Main drive synchronizer stop ring (28) from the
synchronizer sleeve (29).
2. Spring retainers (32) from the synchronizer hub
(31).
3. Synchronizer hub (31) from the synchronizer (29).
4. Oil pump screws (79) from the oil pump (12).
Clean
1. Bearings.
• Remove all old lubricant and dirt.
2. Shafts.
3. Sprockets.
4. Chain.
5. Oil feed ports and channels in each case half.
Apply compressed air to each oil feed port and
channel to remove any obstructions or cleaning
solvent residue.
6. All mating and sealing surfaces.
CLEANING AND INSPECTION
J 29369-1
38. Input Drive Gear
Figure 7— Removing the Input Gear Bearing
Removal
Important
The oil pump is not a serviceable unit and should be
replaced if it is defective.
I?
Inspect
1. Bearings and thrust washers for spalling, brinnel-
ing, or corrosion.
2. Gear teeth for excessive wear, 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. Retainer rings for excessive wear, distortion, or
damage.
6. Case halves for damaged or warped mating sur­
faces, cracks, porosity, or damaged thread holes.
J 2619-01
F5392