I just checked the owners manual and mine has an 18 gallon tank. 1992 Ford Thunderbird 3.8 liter.
On a 1992 Ford Thunderbird : The gas tank is under the vehicle , just in front of the rear wheels
Remove fuel tank for access
You will have to remove the tank. It is located on top of the fuel tank. no it is locate in the tank it self.
16 gallon gas tank.
On a 1997 Ford Thunderbird ( V6 and V8 ) 68.1 liters ( 18.0 U.S. gallons )
The ( 1996 ) Ford Thunderbird Owner Guide shows ( 68.1 liters / 18.0 U.S. gallons )
18 gal.
On a 1997 Ford Thunderbird : The fuel tank is under the vehicle , ahead of the rear wheels
11.9 Gallons
According to my Chilton's Auto Repair Manual : For a 1989 Ford Thunderbird : 3.8 ( 21 U.S. gallons ) 3.8 SC ( 18.8 )
It is in the fuel tank.
in the gas tank