The type of automatic Transmission Fluid to use is stamped on the automatic
transmission fluid dipstick according to the 1997 Ford Ranger owners manual
A4LD - 4 speed automatic
That would be a version of the A4LD automatic transmission
1991-1996 Ranger automatic transmissions use Mercon type automatic transmission fluid.
Motorcraft MERCON automatic transmission fluid in the 5 speed manual transmission on a 1997 Ford Ranger , according to the Owner Guide
( Motorcraft MERCON V ) automatic transmission fluid according to the 1998 Ford Ranger owners manual
For a 1994 Ford Ranger, the manufacturer's recommendation is DEXRON-MERCON automatic transmission fluid.
Mercon V
According to the 2002 Ford Ranger owners manual , the automatic transmissions take Motorcraft MERCON V - automatic transmission fluid ( the type of fluid will be indicated either on the transmission dipstick or the handle )
R-134
According to the 2001 Ford Ranger Owner Guide : Motorcraft MERCON-V automatic transmission fluid ( see if the type used is engraved in the dipstick to confirm )
Even though it is a manual transmission, it takes mercon III automatic transmission fluid.
That would depend on what size engine you have , automatic or standard transmission , 2 wheel drive or 4X4 etc , a little more information please