There's something wrong with the pump - and the only way to fix it is to take it out.
It might be something as simple as the pick-up being bent or interfered with.
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The 1995 Mercury Sable would have come from the factory with ( 5W-30 ) oil in the engines
Mine did the same.it was low on transmission fluid..i would check that because I filled it back up and it was running so much better.
Could be a bad inertia switch.
how much would it cost on a 2004 mercury sable
On a 2000 Mercury Sable : The automatic transaxle ( transmission ) fluid level dipstick would be near the firewall just to the drivers side of the engine ( where the transaxle is bolted to the engine )
Replace your transmission pump or get a new transmission.
According to the 2002 Mercury Sable Owner Guide : ( the 6 disc C.D. changer is either located in the center console , the trunk , or the right side of the cargo area , that would be for the wagon version )
check all your ground wires
Fuel leak at hose or fitting Carbon canister is exhausted
The first clue would be if the car doesn't turn over :)
check pcv hose elbow for vacuum leak.
The price of a 1995 Mercury Sable brake line system, would depend on where the parts were bought, and what specific brand type of the parts. Usually, better deals are found online than in stores.