OK so the morning started off really well, then ended on my return trip with the car kicking down into 3rd on the highway again.

*I realize this transmission will need to be rebuilt, it will get done, it's just not in the budget at the moment*

I will do one more fluid change today, with the 10 weight. If anyone would be able to point to specific brand, that'd be helpful. I guess what I'm a little confused about is whether it matters if it's 10W-30, 10w-40, etc, whatever.