2012 GS magnetic drain plug
They don't allow unwanted metallic particles flowing around and that's an allied for peace and longer life.
I routinely find metallic particles that are way too small to be trapped by the filter even though i have a 55 lbs on filter magnet too.
https://www.summitracing.com/parts/f...W6UaAoE18P8HAQ





Personally, I expect the filter to do that job. The size of the particles of ferrous materials captured by a magnet, that could cause additional wear are no smaller than the size of any other particles captured by the filter.
Take in consideration that not all magnets are the same...conventional magnetic lose effictiveness under high temperature - even among "rare earth" types!
Higher temperature rare earth types are substantially more expensive.
I am a believer of using magnet on all drain plugs, includeinng trans and differential.
Having said that. Since I also make my own MDP, high temperature capable magnet is my preference. Additional are also sticked on body of engine oil filter exterior.
In the case, where weight saving is more of a concern, such as with my motorcycle...aside correct type magnet, drain plug is custom machined titanium.
Bottom line-it is to each his own!
And since I have the wet sump, I have only one drain plug.
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Food for thought:
1. On the bottom of my previous owned Chevy Astro van, during dropping its auto trans steel oil pan to replace with an over capacity after market aluminum oil pan as well as installation of a higher performance shift kit.....noticed there was a flat magnet glued on oem steel oil pan, loaded with magnetic sludge
....so, aside the customery home made MDP, I epoxy large flat "rare earth" type on new aluminum pan.
2. Few years back, during process of differentail change out from stock to an 4:10 on my '05 Vette, manual tail shaft cover had to be replace with an '06 up adaptor, after oem tail shaft cover was removed, there on the bottom of the transmission housing, forward of the mating flange for the tail shaft housing-two flat glued on flat magnets-both were covered with magnetic sludge.
I certainly am not pretending to be an subject matter expert, rather simply expressing my observation.
Most averge car owner seldom work on their car, especially on auto/manual transmission....!
Just "guessing", based on magets were in both Chevy oem auto and manual trans...maybe Chevy engineers put magets in there for a good reason?
I dare to speculate, maybe magnetic sludge is akin to extra fine grade lapping compound-captured magnetic sludge is better than allow it to circulate!?









