How to identify a non lockup A999 transmission with pics!

beaverwill said

? I was told my 1974 plymouth 318 has a 998 not 904 anybody know ? it's all stock never messed with

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What kind of car is it? If it's an A body, it's not a 998, it's a garden variety 904. If it's a heavier vehicle it's possible it's a 998 but even then it's not likely. AFAIK, Plymouth didn't make many trucks in 1974 (if any) so that makes the possibility of it being a 998 even less likely.

In any event, the only difference between a 998 and regular 904 is that a 998 has a 4 disc front clutch as opposed to the normal 3 disc in the regular 904 so it's really nothing special anyway. The A999 would have 5 discs.

Like I've posted before, the only way to verify what you have is to open it up. You can check the PK number on the case pan rail is but that still won't tell you what's inside. There's no guarantee that even if the case is marked as an XYZ variant, it may not have the larger front drum. All 904s are externally the same.