Cleaning and Inspection Procedure
Important: Do not spin dry the ball bearings.
- Clean all of the parts in a suitable solvent.
Air dry the parts.
- Inspect the gears for the following conditions:
| • | High spots (small shiny spots on the gear teeth mating surface).
High spots could cause gear noise. |
- Inspect the other surfaces on the gears (such as the thrust faces
and the bearing surfaces diameters).
- Inspect the synchronizer sleeves for a sliding fit on the synchronizer
hubs.
(Used output shaft hubs will have a slip fit.)
- Inspect the synchronizer springs and keys for damage.
- Inspect the synchronizer rings for excess wear.
- Inspect the synchronizer clutching teeth for the following conditions:
- Inspect the speed gear clutching cones for metal transfer from
the synchronizer ring.
- Inspect the gear teeth for excessive wear.
- Inspect the bearings and the bearing surfaces for the following
conditions:
- Lubricate all of the bearings.
Check all of the bearings for rough rotation.
- Use a soft stone or a crocus cloth in order to correct the following
conditions:
(If a soft stone or crocus cloth cannot remove the condition, replace
the component and inspect the mating parts.)
| • | Synchronizer ring metal transfers |
- Lubricate all of the components as assembly progresses.
Use lubricant Synchromesh Transmission Fluid with friction modifier.
Cleaning and Inspection Procedure
Important: Do not spin dry the ball bearings.
- Clean all of the parts in a suitable solvent.
Air dry the parts.
- Inspect the gears for the following conditions:
| • | High spots (small shiny spots on the gear teeth mating surface).
High spots could cause gear noise. |
- Inspect the other surfaces on the gears (such as the thrust faces
and the bearing surfaces diameters).
- Inspect the synchronizer sleeves for a sliding fit on the synchronizer
hubs.
(Used output shaft hubs will have a slip fit.)
- Inspect the synchronizer springs and keys for damage.
- Inspect the synchronizer rings for excess wear.
- Inspect the synchronizer clutching teeth for the following conditions:
- Inspect the speed gear clutching cones for metal transfer from
the synchronizer ring.
- Inspect the gear teeth for excessive wear.
- Inspect the bearings and the bearing surfaces for the following
conditions:
- Lubricate all of the bearings.
Check all of the bearings for rough rotation.
- Use a soft stone or a crocus cloth in order to correct the following
conditions:
(If a soft stone or crocus cloth cannot remove the condition, replace
the component and inspect the mating parts.)
| • | Synchronizer ring metal transfers |
- Lubricate all of the components as assembly progresses.
Use lubricant Synchromesh Transmission Fluid with friction modifier
GM P/N 12377916 or equivalent.
