Just your regular dextron 3 fluid.
Dextron III will work and is cheap. Type F is better, since more friction. Best is ATF+4 which is the current Chrysler fluid. I read that it is fully synthetic and has the most friction modifiers for faster, firmer shifts which saves your clutch plates. It is specified for the front-wheel drive Torqueflites (A-413, ...) which are almost identical inside to your 904 or 727 transmission (you didn't tell us).
In a 1973 Dodge Coronet , the 318 was set at ( TDC ) with the automatic transmission ( a 1973 manual transmission equipped 318 was set at 2 and 1/2 degrees BTDC )
dexron III
No
The firing order of a 1973 Dodge Coronet with a 6 cyl (225) engine is 1-5-3-6-2-4 The firing order of a 1973 Dodge Coronet with an 8 cyl engine is 1-8-4-3-6-5-7-2
6 cylinder 105 hp 3682 cm3
Type F. Do NOT use Dextron or General Motors type.
It should tell you right on the transmission dipstick.
E-bay, craigslist, or possibly a local swap meet.
what type of oil should i use in transmission 240z 4 speed
more than likely it's an A-901.
Use Motorcraft ATF
Anything is possible, but the automatic in a 1999 Ram needs a computer to shift.