So, in order to remove the tube to replace the seal, did you just yank it out from the upper pan? I thought that the point of taking the lower pan off was to tap the tube out from below with a socket. Isn't there a check valve at the bottom of the tube that you have to avoid damaging? I've wanted to address this leak for a while. If it's this easy, I'll do it next month. Thanks

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'81 300SD