Honda/Acura uses Motor oil in there Gear boxes, if you use Gear oil it will eat the brass in the tranny, also if you use automatic fluid it will do the same!

Either use
1qt GM Syncro mesh with 1 qt 10w40 motor oil
or use
Honda fluid its 5 bucks quart

I use the regular MOBILE 1 10W40 with no issues and I rebuild them and never a issue!


NEVER USE
Automatic fluid or Gear oil!!!!