You do not say if it is a manual or automatic transmission. Automatic trans will take mercon V (all Ford products that took mercon will now go to mercon V as mercon will no longer be made by ford)
Mercron transmission fluid is used in a 1978 Ford Thunderbird. Type F fluid can also be used but should not be mixed.
For a 1994 Ford Thunderbird : ( DOT 3 brake fluid , meeting Ford specification ESA-M6C25-A )
Where do I add transmission fluid to a 1994 Ford explorer with a manual transmission?
Mercon V
The 1994 takes Mercon transmission fluid
Through dipstick tube-auto?
A 1994 Ford Econoline Van uses standard Mercon type transmission fluid. This fluid is used extensively in most Ford vehicles.
On a 1996 Ford Thunderbird : Through the automatic transmission fluid dipstick tube ( using a funnel ) The dipstick is located near the firewall , in the engine compartment , on the right side of the engine ( passenger side )
rear passenger side of engine
Rear of engine near firewall.
bolt pattern for a 1994 ford thunderbird
Use a tranny funnel and add through the dipstick tube.