...Mean Green Orange Champ Cleaner and Degreaser.
Is that different from regular Mean Green?
Mean Green is great stuff, but it will oxidize bare aluminum (especially), and other metal.
It does seem to be different. It's essentially for household use, but it works well on the engine. I used it to clean the oil off the top of my engine when I replaced the distributor O-ring. I've seen no signs of oxidation on the transmission though it says it's not recommended for acrylic, leather, or aluminum. I suppose a good rinse would help.