1998 Lexus Ls 400 Transmission Pan Gasket Leak Oil.

Ossy1 · November 4, 2013

My 1998 Lexus LS 400 Transmission Pan gasket leaks oil. I have changed it 4 times within the past month and still leaks oil. I don't know what to do.

landar · November 5, 2013

Are you using cork, rubber or RTV gasket material? If you use the RTV or FIPG (Form In Place Gasket) material, that would probably be your best bet to stop a leak.

Garo_mcc · November 6, 2013

Even if you use a gasket try some Permatex high temp sealant as well, that away it's like double protection!

landar · November 7, 2013

I should mention that I had this same issue on my 98 LS400 and it was due to warping the pan while taking it off the transmission. Those pans are really stuck fast and when you pry to get it off, you will inevitably bend the pan on an edge, if ever so slightly. So, I cleaned the outside of the pan and let the car sit overnight. Next day, I pinned down the location of the leak and used a wide, flat blunt punch and hammer to peen the edge of the pan back into shape in the offending area. It worked.