Had a discussion with Cody about putting magnets on the outside of the trans pan to catch particles on the inside.
I suggested neodymium magnets, since they are so strong that you can use a small one that won't get snagged, and still have more than enough power to collect particles through the steel of the pan...
Anyway, Googled up and found two sites that do nothing but sell neodymium magnets.
There'* some neat stuff on here, lot'* of possibilities for small projects. I ordered some discs with counter-sunk screw-holes. Gonna use them to keep the cats out of the cabinets...they're 3/4"x1/8" and they can lift over 33lbs...
Need some place to hang a work light, and don't have a handy projection?
# Weight: 19.8 oz. (561 g)
# Pull Force: 361.6 lbs
They also sell some real monsters, this site has a 6"X1" disc that has a pull force of 540 pounds!
Anyway, on the original topic, these are the ones they recommend for oil pans. They're high temp material, so they can go to 300* without losing strength. Regular Nd magnets can only go to 175* before they begin to lose strength.