Rear of engine near firewall.
On a 1999 Mercury Grand Marquis : The automatic transmission fluid level dipstick is in the engine compartment , near the firewall , towards the passenger side of the engine
On a 1989 Mercury Grand Marquis : The automatic transmission fluid level dipstick should be in the engine compartment , near the firewall ( the metal wall that divides the engine compartment from the passenger compartment ) just towards the passenger side of the vehicle ( where the rear of the engine connects to the transmission )
Look at the back of the eng. by the firewall on the passengers side, it should say TRANS on the handle
Your 1996 Mercury Grand Marquis may need a new transmission or something as simple as transmission fluid.
on the transmission
should be drivers side, near valve cover.
Mercury Grand Marquis was created in 1983.
4.6 L engine, open the hood, passenger side, look between the engine and the fire wall, it's there. Ford likes to hide things.
I was not aware that the Grand Marquis came in a manual Transmission! If it was an Automatic Transmission I would say take it to a Transmission Shop and have it looked at.
Remove the transmission and take it off.
According to the 1996 Mercury Grand Marquis Owner Guide : With engine oil filter change : *( 5 quarts ) * engine oil dipstick is used to determine the fill amount
Physically, yes. It would be best to consult an interchange reference to know if the wiring and programming are compatible.