I have a leaky transmisson line, on the right side, it looks like it at the connection between the flex hose and the rigid steel line that goes back to the transmission. I replaced the flex hose but it's still leaking. I was wondering if there's any joint sealer I could use, like teflon tape, or is it the steel line that goes to the transmission that needs to be replaced?

It's for a 1998 C230.

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You can try pipe joint tape, but most likely the fitting is the issue.

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I'll try the teflon tape, but if doesn't work would that mean replacing the line? Could anything be done to the fitting to stop it from leaking?