FORD 2002 Thunderbird v.1 - Manual (Page 221)

TRANSMISSION FLUID
Checking automatic transmission fluid
The 5R55N transmission does not have a transmission fluid dipstick.
Refer to your scheduled maintenance guide for scheduled intervals for
fluid checks and changes. Your transmission does not consume fluid.
However, the fluid level should be checked if the transmission is not
working properly, i.e., if the transmission slips or shifts slowly or if you
notice some sign of fluid leakage.
Transmission fluid should be checked and, if required, fluid
should be added by a qualified technician.
Before adding any fluid, make sure the correct type is used. Use only
MERCON
௡ V automatic transmission fluid. The type of fluid used is
indicated on the transmission fluid pan, extension housing and also in
the Lubricant specifications section in this chapter.
Use of a non-approved automatic transmission fluid may cause
internal transmission component damage and void the warranty.
AIR FILTER MAINTENANCE
Refer to the scheduled maintenance guide for the appropriate intervals
for changing the air filter element.
When changing the air filter element, use only the Motorcraft air filter
element listed. Refer to Motorcraft Part Numbers.
Note: Do not start your engine with the air cleaner removed and do not
remove it while the engine is running.
Maintenance and specifications
221