a904 died while driving

Hi Folks,

I'm (not) driving a 68 barracuda with a 318, a904 trans.

I just purchased the car a week ago, and drove it approximately 600 miles from central Oregon to Napa (the city, not the auto parts store), with no transmission problems up and down mountains, in 100 degree weather. The car didn't quite make it to Napa, but that was a separate issue that has already been resolved with a $21 fanbelt.

While driving around town in Napa, I started losing power to the rear wheels. I drove up and over a maybe 40' high bridge (Imola Ave) and it started acting as if I was slipping a clutch on a manual to stay in place on a slope, delivering almost no power to the rear wheels. I made it off the bridge and to the side of the road. No matter what gear I put it in, it doesn't even try to engage. Whether it's warm or cold. The car can be pushed around in neutral, and seems to be stopped in park right next to the mother-in-law's 72 Javelin and 63 bug.

Prior to all this, I checked the transmission fluid (while in neutral). It was that nice pretty clear red color, and about 3/4 up between the add more and don't add no more lines.

I have not opened it up to check the filter, or anything else yet. From what I describe, what are these symptoms pointing at?

Also, does anyone have a list of the tools I'll need to rebuild the trans?

Thanks in advance.