Fresh 904 start-up

CudaFactHackJob said

"A low converter would have a higher stall than it should"?!? NO. There's a lot of bad info out there. If there isn't enough fluid to fill the converter, then there surely won't be enough fluid to apply clutches or bands. Run it about 1/2" above full. Just remove the neutral safety switch to drain out any excess. And set the kickdown so it's at max when the carb is at max.

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Was based on my experience when I had to limp the car home with a fluid leak (I'm smart enough to not do this again), it felt like my converter was getting looser and looser as I went. To verify pump functionality could I pull a cooler line to see if there's pressure out?
I hate this "maybe it's a problem, maybe I'm an idiot who can't count how many quarts are in it and is too worried about it" and the car is weeks from being safe to drive down the road. If I need to have the trans fixed, I'd rather pull it now and then do suspension work.