Yes, it is the same transmission.
1991 and up Rangers with 3.0l engines had the Mazda M50D-R1 manual trans
You should change transmission fluid while it is out, easier to fill, lol.
Also draining used trans fluid will tell you a bit about how it was running.
'98 and older M5OD should get Mercon ATF, now called Dex/Merc ATF, yes automatic transmission fluid in a manual
'99 and later can use Mercon V ATF, some have complained the V makes shifting harder in '98 and older M5OD trans, even though Ford recommends it since they stopped making Mercon.
Or you can use a synthetic, many are available
Takes about 5 Quarts
Last edited by RonD; 02-14-2015 at 09:31 AM.