My 1992 Corolla is leaking oil when driving then pools while parked. Already checked the oil pan and no leak. Where else could it be coming from?
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One popular possibility is oil leaking past the rear main seal when running, accumulating in the transmission's bellhousing, and then draining from there when parked. Happens a lot when rear mains start to leak.
Oil around the rear of the oil pan, on the bottom of the transmission are all good signs of this.
Front main seal is a likely culprit also, where the majority of it is pooling when you park can tell a lot.