A904 ID - Strange Situation
A 904 is a 904, it doesn't matter what motor is in front of it, that is all taken care of by the flex plate, converter and dampner! I would, however, expect to find a 727 behind a 360 in the late 70's,'although it can be either trans! My guess?? The trans went out in the Monaco and somebody swapped that one in there!!
How well do you know these transmissions? I've been doing research these past few hours and there are different versions of the A904. I found the following:
900 Series Torqueflite Info
History:
The first A-904 automatic transmissions appeared in 1960 with the new "G" and "RG" slant six engines. The designation was A-904G.
Characteristics:
The 904 torque converter has a 1 1/2" drive hub and a 122 tooth ring gear.
Types
- A904G - This was a three front clutch, two rear clutch transmission used with Slant six cars. In 1980, the A-904G got the 2.74:1 first gear ratio and 1.54:1 second gear ratio. The 904 was later redesignated as the 32RH and the "2" is the rated torque capacity in hundreds of ft. lbs. (200 ft. lbs.)
- A904LA - The A-904LA was used with the new LA 273 V8 engine.
- A998 - The A998 was a four front clutch, three rear clutch transmission used in 318 2 barrel cars and had four or five clutches. The four clutch 998 had made it's first appearance in police car form in 1975 in the 360 2 barrell (Federal) Dodge Coronet. All 1981-1988 A998s had the 2.74:1 first gear ratio, 1.54:1 second gear ratio and a five clutch direct drum. A998 did not have the double wrap low & reverse band like the A999.
- A999 - The A999 appeared in 1974 as a beefier small case transmission to put behind 360s. It was widely used in 360 equipped B-bodies and and C-bodies. It had a five disc front clutch pack, a three disc rear clutch pack, a 2.45:1 first gear ratio and a double wrap low & reverse band. A lockup version of the A999 appeared around 1980. Around 1981, the A999 got a 2.74:1 first gear ratio and 1.54:1 second gear ratio, along with all other 900-series Torqueflites. In 1984, the A999 appeared in 318 4 barrel equipped police cars, replacing the standard 727 transmission used before that time.
This is why I asked the original question. I wanted to know if there was anything about this transmission that I needed to know. From the list above, looks like the one I found in the '78 B-body
MIGHT be a A999.
That looks good to me. :cheers: :cheers: :cheers:
