Review on 🔧 DORMAN HELP! 65128 Transmission Drain Plug Kit: Efficient Solution for Easy Transmission Maintenance by Derrick Bellando

This is the main method of installing a drain plug on the transmission pan. But there are a few things you should do/change. It comes with two nylon/plastic washers. When I used them I had a leak. After using the new drain to drain the oil pan, I removed the oil pan, transmission drain kit and replaced the washers with brass washers. I'm sure another soft aluminum disc would be fine as well. What I wanted to do was be able to tighten the nut firmly and force the soft metal to create a seal around the hole I drilled in the transmission pan. I also removed the small rubber gasket on the drain plug. If you tighten the plug so that it does not come out, you will crush the rubber seal. A bit of thread lock was applied to the plug to ensure it didn't come loose and leave gear oil all over the place.