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4/29/22, 11:17 AM
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Volvo Chassis - Equipped With An Automated
Manual Transmission Model D or F ( I-Shift, AMT-D,
AMT-F ) - Transmission Oil Leakage From
Transmission Input Shaft Seal Or Output Shaft
Seal - US10 And Newer Emissions, Common Model
Years 2010 And Newer
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Internal Content
When diagnosing and repairing a shaft seal leak:
1. Check the vent ports on the upper left side of the the main gearbox
housing for any sort of blockage or obstruction.
Clogged vent ports
2. Clean out any debris that is observed during the inspection. (see
inspection and cleaning below)
3. Check the tranmsission oil level in the gearbox.
- If the lube level is excessively low: Proceed to the next section.
- If the lube level is at an acceptable level: Fill the transmission oil
to the correct level and check operation.
For excessively low transmission oil levels, or customer report of
noise from the transmission:
1. The transmission will need to be inspected for internal
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damage.
Removal may be required for proper inspection.
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Inspection and cleaning
Due to the location of the vent ports it is very difficult, in most
applications, to see the vents. An inspection mirror and flashlight can be
used to see if there is a buildup of roadsalt or other debris in the ports.
If the ports are clogging then use a small screwdriver or similar tool to
break up the deposits in the ports.
Clean and remove the upper oil fill plug from the main case on the right
side of the gearbox.
Wrap a clean rag around an air nozzle and blow air into the case. Use
proper eye protection. A complete seal is not needed. All you want to do
is create enough pressure to force the debris from the vents on the left
side of the case.
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