| DEFINITION: Visible sign of the transmission fluid leaking from the transmission. |
| 1 |
Did you review the Symptoms - Manual Transmission and perform the necessary inspections? |
Go to Step 2 |
Go to Symptoms - Manual Transmission |
| 2 |
- Inspect for the transmission fluid level higher than the recommended level. Refer to Transmission Fluid Replacement .
- Adjust the transmission level if incorrect.
Was the transmission fluid level too high? |
Go to Step 19 |
Go to Step 3 |
| 3 |
Inspect the transmission vent for a blockage.
Is the transmission vent blocked? |
Go to Step 4 |
Go to Step 5 |
| 4 |
Repair or replace the transmission vent. Refer to Transmission Vent Tube Replacement .
Did you find and repair the condition? |
Go to Step 19 |
Go to Step 5 |
| 5 |
Verify the location of the leak.
- Clean the transmission assembly.
- Operate the vehicle for 24 km (15 mi), or until normal operating temperatures are reached.
- Visual inspect or use the powder method or dye and black light method to locate the leak.
Is the leak occurring at the drain or fill plug? |
Go to Step 6 |
Go to Step 7 |
| 6 |
Replace the drain or fill plug. Refer to Transmission Fluid Replacement .
Did you find and repair the condition? |
Go to Step 19 |
Go to Diagnostic Aids |
| 7 |
Is the leak at the transmission output shaft seal? |
Go to Step 8 |
Go to Step 9 |
| 8 |
Remove the output shaft seal and inspect for the following. Refer to
Extension Housing Disassemble (Y Car)
Extension Housing Disassemble (CTSV)
and
Extension Housing Assemble (Y Car)
Extension Housing Assemble (CTSV)
in Unit Repair.
- Damaged or worn seal
- Damaged seal bore
- Improper installation
- Cracks in the component
- Propeller shaft yoke sealing surface is scratched, nicked, damaged, or worn
- Loose or worn bearing causing excessive seal wear
- Yoke flange nut loose
Did you find and repair the condition? |
Go to Step 19 |
Go to Diagnostic Aids |
| 9 |
Is the leak at the front of the transmission? |
Go to Step 10 |
Go to Step 12 |
| 10 |
- Inspect for the leak at the input shaft seal.
- Inspect for the following if the input shaft seal is leaking:
- Damaged or worn seal
- Damaged seal bore
- Improper installation
- Cracks in the component
- Input shaft sealing surface is scratched, nicked, damaged or worn
- Loose or worn bearing causing excessive seal wear
- Replace the input shaft seal if leaking. Refer to the Adapter Plate section of
Trans Case and Adapter Plate Disassemble (Y Car)
Trans Case and Adapter Plate Disassemble (CTSV)
Trans Case and Adapter Plate Disassemble (GTO)
and
Trans Case and Adapter Plate Assemble (Y Car)
Trans Case and Adapter Plate Assemble (CTSV)
Trans Case and Adapter Plate Assemble (GTO)
in Unit Repair.
Did you find and repair the condition? |
Go to Step 19 |
Go to Step 11 |
| 11 |
- Inspect the case for cracks or porosity.
- Replace the transmission front case half if it is faulty. Refer to
Transmission Disassemble (Y Car)
Transmission Disassemble (CTSV)
Transmission Disassemble (GTO)
in the Transmission Unit Repair Manual.
Did you find and repair the condition? |
Go to Step 19 |
Go to Diagnostic Aids |
| 12 |
Is the leak at the backup light switch? |
Go to Step 13 |
Go to Step 15 |
| 13 |
- Remove the backup light switch. Refer to Backup Lamp Switch Replacement .
- Inspect for the following:
- Cross threaded or damaged threads
- Insufficient sealant
- Leaking switch
- Improper installation
Did you find and repair the condition? |
Go to Step 19 |
Go to Step 1 |
| 14 |
- Remove the shift shaft detent sleeve. Refer to
Transmission Disassemble (Y Car)
Transmission Disassemble (CTSV)
Transmission Disassemble (GTO)
and
Transmission Assemble (Y Car)
Transmission Assemble (CTSV)
Transmission Assemble (GTO)
in the Transmission Unit Repair Manual.
- Inspect for the following:
- Cross threaded or damaged threads
- Insufficient sealant
- Cracked sleeve or case
- Improper installation
Did you find and repair the condition? |
Go to Step 19 |
Go to Step 1 |
| 15 |
Is the leak at the sealing flanges of the transmission case? |
Go to Step 16 |
Go to Step 17 |
| 16 |
- Remove the transmission. Refer to Transmission Replacement .
- Disassemble the transmission. Refer to
Transmission Disassemble (Y Car)
Transmission Disassemble (CTSV)
Transmission Disassemble (GTO)
in the Transmission Unit Repair Manual.
- Inspect the sealing surfaces. Refer to
Trans Case and Adapter Plate Cleaning and Inspection (Y Car)
Trans Case and Adapter Plate Cleaning and Inspection (CTSV)
Trans Case and Adapter Plate Cleaning and Inspection (GTO)
and
Extension Housing Cleaning and Inspection
in the Transmission Unit Repair Manual.
Did you find and repair the condition? |
Go to Step 19 |
Go to Step 17 |
| 17 |
Is the leak coming from a crack or porosity in the transmission case ? |
Go to Step 18 |
Go to Diagnostic Aids |
| 18 |
- Remove the transmission. Refer to Transmission Replacement .
- Disassemble the transmission. Refer to
Transmission Disassemble (Y Car)
Transmission Disassemble (CTSV)
Transmission Disassemble (GTO)
in the Transmission Unit Repair Manual.
- Replace the faulty case. Refer to
Transmission Assemble (Y Car)
Transmission Assemble (CTSV)
Transmission Assemble (GTO)
in the Transmission Unit Repair Manual.
Did you find and repair the condition? |
Go to Step 19 |
Go to Diagnostic Aids |
| 19 |
Operate the system in order to verify the repair.
Did you correct the condition? |
System OK |
Go to Step 1 |