It began doing the notorious slip-bump, typically cause by a"fuzzy"(with steel) PCS and that would have eventually killed it. The vehicle is fairly new to me and while I had changed the trans fluid, the Magnefine installation was a bit more challenging and I hadn't gotten 'round to it yet. Transmissions really need better filtration and why I have a cooler line magnetic filter on every automatic I own.Īs an aside, I recently cured a slip-bump problem on my 4T65E by installing a Magnefine cooler line filter. It's a cheap OE way to get the trans out of warranty. That's why the pan magnets are there in the first place, to try and catch them before the solenoid does. The issue is that the solenoids in the trans are nothing more than electromagnets, so as your trans generates ferrous metallic contamination, those are going to be the places where it collects. The pan filter is no better than a 60 micron. The particles range in size from 5 to 80 microns, about 82 percent of them larger than 5 microns. Of those metallic particles, 51 percent are ferrous (iron/steel), 21 percent copper, 11 percent aluminum and 7 percent lead. Why? According to John Eleftherakis and Abe Khalil, did a series of studies for the OE trans manufacturers and the aftermarket that started in the late '80s, and continue to today, the contamination makeup of the average transmission oil is 90 metallic. Not having it installed won't be a problem today, tomorrow or the next day, but sooner or later. If you took your car to a shop and the tech forgot it, you'd rightly demand the owner do it right. Saying not to bother is very bad advice in the long term. Get away with! You'll never make that mistake again! LOL Now put back the OEM magnet and a few extra! All manufacturers only put in the bare minimum they can I bolded the word inside because it's really important!Ĥ8re are pretty good, so you might get away with it for a while, but I'd drop the pan In my case solenoid operation improved over time improved with the extra mags inside the pan. So even as you change the AFT in a year, a lot of wear metals will be in the valve body, once you getĮxtra mags back inside the pan, they'll slowly flush out and get trapped on the mags inside the pan. Malfunction since it's duty cycle is very high. The PCS (pressure control solenoid) is at highest risk of contamination and sticking leading to The mag is missing on the inside, the wear metals will migrate to the valve body and get into When you do drop the pan, plan on placing extra mags on the inside. Strong it was on the inside, not very good at all. I know, because I had the pan off a while ago and tried magnets on the outside and checked how Just to come close to the OEM on the inside. You'll need to stick on 3-4 extra magnets on the outside 050" thick steel or more, this means magnets on the outside have less thenĢ0% of their field reach the inside.
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