Dex III in Powerglide - Help...

[Eliasj123]

I know this issue is not on my '64, but my '55 has a powerglide too and you guys know your stuff..

Soo... Today, I did a lumbnuts move.. The Powerglide on my '55 leaks. I added 1/2qt of Dex III, then drove it around the block.. When I got back, I decided to read the manual... DOH!!!! TYPE "A" fluid only..

Did I hurt the tranny?? I was going to change the fluid, but do I need to flush it too??

I don't know too much about tranny fluid. I just get what the manual says.. Most of the time I read before I add fluid..

Thanks,
Elias