Transmissions don't produce enough heat to kill a magnet. If you want to do that, buy a laser. A BIG laser. Trust me.

And sucking it up into the trans isn't something I'd be concerned about, unless for some reason you're not running a trans filter.

The reason this topic exists, is that TFC found no OEM magnet in his pan last weekend, but remembered what I'd done to the Zilla a couple years ago when my trans started coming apart. My trans shop was impressed at the hard-drive magnet'* ability to trap nasty ferrous particles, and was so impressed, they reinstalled them back onto the rebuilt trans before I picked the car up. I put them on the outside of the pan for convenience.

http://www.williamwren.com/bonnevillepics/pan.jpg

http://www.williamwren.com/bonnevillepics/magnets.jpg

http://www.williamwren.com/bonnevillepics/penny.jpg

http://www.bonnevilleclub.com/forum/...ic.php?t=25433

Just to pitch in, I've had HD magnets on the outside of both the tranny and oil pans since the first time Will mentioned them. I haven't lost one yet, or picked up any road debris. No glue either, just the magnet hanging there. So, if these magnets are even better, y'all should be fine.

But, I can just picture being stopped at a light and your passenger hears a "tink, tink, tink..."
"What'* that?"
"Just my transmission picking up nails. Don't worry about it...."

i dont care if they dont work for the tranny, they would still be fun to play with at my desk

me too, just will be fun to play with, amaze your friends, etc.
run them by someone'* computer and screw up their screen and hd

Ohhh! On the outside, eh? I feel much better. :P

Yeah, the specs didn't mention how much pulling force is lost if temp exceed 176*, but it depends on the magnet itself. I've seen some magnets not tolerant of heat at all, and will almost lose 3-5% pulling force per degree above max (approximation based on observation). Others, likely like this one, or a hard drive magnet, will not lose much pulling force if the max temp is exceeded.

It just seemed to me that 176* was low.

I've been playing with the small ones at home. I'm extremely anal and make sure nothing that can be damaged is around. I cannot pull the 2" high stack of magnets apart, only one at a time.

And the diameter is only: |--.5"--|

If you've heard of an "LED Throwie" that'* what these magnets are used with. Do a google search. I believe the Boston incident where signs were thought to be bombs were made from these (according to my brother).

Overall..being stronger than stock magnets...they should work better even if the temp degrades the pulling power.

The stock magnets aren't all that strong to start with, so if the heat doesn't make them go floating off into parts unknown, putting a better magnet in there shoudl be no problem at all.

For the HD magnet crowd, though, I'd be careful. I've very rarely gotten a magent out of a HD without the plating flaking a bit. It sticks to the magnet, but no sense adding extra flakeage to the mix.

I understand where your thinking is.

My thinking is that although a magnet has stronger pull at room temperature than the other, if one is rated at a higher temp than the other, it'* likely due to differences in material, and will have a different rate of loss than the other.

The polarity of some metals maintain longer throughout particle acceleration (the effect of heat on molecules) than other metals, leaving the previously weaker magnet actually stronger at higher temps.

My curiosity is piqued. :P

The downside to the SH (Super High Temp) neo magnets is their strength is much less than the normal neodymiums.

In other words, a 1" x 1/8" regular NdFeB magnet is much stronger than a 1" x 1/8" high-temp magnet. Now of course you could just grab a much larger SH magnet to compensate.

But another important thing to keep in mind though is that these magnets only BEGIN to lose some strength after 176*F. Up to that point, the power is 100%. If these get over 176, which is unlikely, it would not be much, and the power loss would be insignificant.