recommended fluid

I have a 78 chevy truck with a 2 speed powerglide. What type tranny fluid should I use? And what happens if I use a type A fluid in the existing fluid?

I thought powergluide's were not used past the mid-1960's. I think they use dinosaur juice.

Nothing will happen but dexIII is much better.

Dinosaur lol

Hehe, dinosaur,

I'd say dexI or dexII because its not a new transmission and dex III could damage the seals.

Just to let you know that factory bulletin 57-02-01 states Dextron III is fully compatible with all GM automatics built since 1949.

Just sharing my factory info...Not trying to prove anyone wrong :)

Hmm, ok, it just says not to use dex 3 in my tranny. Only II or IIE