automotive torque converters do not have a drain plug.
Special draining instructions may be found in the
manufacturers repair manuals. Before performing this
operation, clear it with your maintenance supervisor.)
Refilling the Transmission. Reinstall the
transmission oil pan, the oil plug, and fill tube. Fill the
transmission with the fluid prescribed by the
manufacturer to the proper level. With the brakes
applied, start the engine and let it idle for a couple of
minutes. Move the gear selector through all positions
several times, allowing the fluid to flow through the
entire hydraulic system to release any trapped air.
Return the selector lever to park or neutral and recheck
the fluid level. Bring the fluid to the proper level. Run
the vehicle until the operating temperature has been
reached, and check for leaks in the process. At operating
temperature, recheck the fluid and adjust the level, as
Overfilling an automatic transmission will
cause foaming of the fluid. This condition
prevents the interred working parts of the
automatic transmission from being correctly
lubricated and causes slow actuation of the
bands and clutches. Eventual burning of the
clutches and bands results. DO NOT
OVERFILL AN AUTOMATIC TRANS-
TROUBLESHOOTING. Good troubleshooting
you know what you are doing when you troubleshoot an
automatic transmission, you should be able to pinpoint
the problem before you remove it from the vehicle. In
some cases, you may be able to make the repairs without
removing the transmission.
Next, before troubleshooting the transmission,
make sure the engine is in good running condition. An
engine that is not operating properly will not allow the
transmission to function normally.
Locate the transmission serial number (fig. 7-22).
This is important for finding the correct troubleshooting
information and in obtaining repair parts.
The information (table 7-2) included here will assist
you in locating and correcting the troubles that could
develop in the Turbo Hydra-Matic Model 400 series
automatic transmission, a type found throughout the
NCF in M-1008, M-1009, and M-1010 series trucks.
A malfunction may have more than one
probable cause. Complete all the tests and
inspections for each cause to find the correct
Keep in mind that it is impossible to list each and
every malfunction and its possible corrective action in
this training manual. The problems listed are the most
common. If you have a problem occurring in your
transmission that is not listed here, see your supervisor
practices save a lot of time and money for the Navy. If
Figure 7-22.Typical example of the data plate location on an automatic transmission.