Auto Trans/front Diff Drain Plug Gasket

[mikey00]

Does anyone know if the vertically positioned 10mm hex to drain the front diff uses the same drain plug gasket as the horizontally positioned 10mm hex on the bottom of the transmission pan?

[RX in NC]

I've changed our RX's Type T-IV transmission fluid by pulling these plugs and I believe that the metal crush gaskets on both of the plugs are identical. A Lexus tech gave me four new gaskets last November so I would have them for future T-IV changes and there were no indications from him that these gaskets couldn't be shared between the two plugs. I also believe that if your current gaskets are still in good shape, you can simply clean them and re-use them a couple of times.

[mikey00]

I've changed our RX's Type T-IV transmission fluid by pulling these plugs and I believe that the metal crush gaskets on both of the plugs are identical.  A Lexus tech gave me four new gaskets last November so I would have them for future T-IV changes and there were no indications from him that these gaskets couldn't be shared between the two plugs.  I also believe that if your current gaskets are still in good shape, you can simply clean them and re-use them a couple of times.

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The first time I changed the trans fluid I reused the gasket on the transmission pan drain plug. I could never get it to seal perfectly. The bottom of the pan was always slightly wet. About 10k later I did another drain and fill using a new drain plug gasket and it sealed good this time. Now 20K later, I have 2 more drain plug gaskets and some type T-IV and will do another drain and fill also using the front diff plug which I missed the first 2 times. I don't think anyone knows for sure the optimum cycle for RX trans drain and fill but anywhere from 15K to 30K looks right to me.

[TunedRX300]

GL5 is a much thicker oil than ATF. I re-used drain and fill gaskets when I replaced both front and rear with 75w90 Mobil 1. There is not a single drop of gear oil.