A few minor issues while chang'n the trans fluid today, so look'n for suggestions

I haven't used heli-coil in years unless your talking about the brand name in general terms. A self tapping insert is the way to go. They're made for soft steel, aluminum and even plastic. A good local parts store or jobber has them by singles for a couple bucks. Added... in harder steels you have to tap first unless the hole is really worn out.