Some products are claimed to soften or revitalize the rear seals; Rislone or Wynn’s has a product that may help. IMO I think it is not usually the rear main seal but the back pan seal. Usually if the rear main seal is leaking it is usually because some brg material or other foreign particle has damaged the seal. That’s on neoprene type seals.
Best way I have diagnosed it is to put it on a hoist & with car running at fast idle look up at that area with a trouble light, if it is the rear main seal you can usually see a few drops of oil wick out after about 2 minutes.
Last edited by rszmjt; 01-31-2020 at 03:46 PM.
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