I believe the type used is engraved into the transmission ( transaxle )
fluid level dipstick
Right where the transmission dipstick goes. You will need a funnel
According to the 1998 Mercury Sable Owner Guide : ( Motorcraft MERCON automatic transmission fluid is used as the power steering fluid )
Check under where the brake fluid goes its hard to get too and you will need a long spouted funnel
The 1995 Mercury Sable has two different available transmissions. The fill capacities depend on the transmission type. Transmission code AX4S has a specified fill of 12.3-quarts(qts). The AX4N fill is 13.5-qts.
Low transmission fluid, transmission on it's way out.
When the transaxle light is blinking on a 2001 Mercury Sable, it means there are some transmission issues that need to be addressed immediately. This condition may lead to locking of the transmission on second gear.
I am not sure what specs you need, are you looking for engine rebuilding torq specs, transmission rebuilding torq specs, service intervals and fluid specs, load capacity specs, etc?
According to the 1997 Mercury Tracer Owner Guide : For the automatic and manual transaxle ( transmission ) ( Motorcraft MERCON Multi Purpose automatic transmission fluid )
Your 1996 Mercury Grand Marquis may need a new transmission or something as simple as transmission fluid.
It's electronically controlled by the PCM, so if it quit working, then most likely it is going to have to do with something wrong inside the transmission. About all you can do is check the fluid level. After that, it will probably need help from a good "trustworthy" transmission shop.
There is no transmission dip stick for a 2002 mercury mountaineer, fluid will need to be checked from under the vehicle. There is a fill plug on the transmission, remove the plug and fluid level should be up to the level of the plug hole. This is the only year mercury did this in the mountaineer.
The same place where you check it, there is a tube that comes up in the right center behind and to the left of the coolant reservoir. It has a small black ball on top. That is your transmission fluid dipstick. It is, unfortunately, not marked in any way. Pull that out and if you need to add fluid put a funnel in that tube and do so.