4-4.2Litres
SpIII
A 1998 Oldsmobile 88 takes ATP automatic transmission fluid. This is sold in most places that carry transmission fluid, or you can buy it through a dealer.
AF
if the transmission does not have a dip stick it is probably atf
You check and add fluid at the same place.
Dextron/Mercon III will work for that transmission
When changing the transmission fluid and filter of a car, it is best to know how much transmission fluid goes back into the car. The 1998 Bravada takes close to 12 quarts of transmission fluid to fill.
The 1998 Ford Taurus Owner Guide shows : Motorcraft MERCON - V , automatic transmission fluid For the AX4N and AX4S automatic transaxles
V.W. recomends you use d.o.t. 3 brake fluid
The automatic transmission uses ATF+4. Do not use Dextron/Mercon.
Motorcraft MERCON automatic transmission fluid is used in the automatic and the 5 speed manual transmission ( transaxle ) according to the 1998 Ford Contour Owner Guide
The 5 speed manual transmission in a 1998 Ford Ranger ( in North America ) takes Motorcraft MERCON automatic transmission fluid