I just had my W56 rebuilt and I figured I would flush it after a few hundred miles or so, and I don't want to waste a jug of redline. I searched around and had a hard time finding a semi-decent cheap fluid. Any thoughts?

 

You just had your trans rebuilt and you want to put cheap fluid in it?

I would change the fluid after a couple hundred miles and then again after a couple hundred miles, then change per the service manual.
Good brand fluid will clean it out better, it won't be a waste.
I took my trans apart and cleaned everything I could, put it back and put Amsoil in, less than 20 miles I drained it (had to pull trans again) and it was black. Cleaned it pretty good.

 

I planned to put Redline in it after I flushed it, I just didn't want to use expensive fluid that I am going to flush soon after. I'm not talking like bottom barrel, just not $60/gallon.

 

I'd still spend the money now on it. And I'm cheap. You just had it rebuilt why not treat it good?

 

Alright that is good advice. It had 320k miles on it I guess I should start off on a good foot.