200r4 mysterious leak

[Todd sanders]

Forum I’m having the worst time with finding this leak!!!. Replaces the trans pan gasket 3x still leaks, used cork and rubber gaskets with and without sealants. took the car to a transmission shop said the cooler lines where leaking they tightened it ...STILL LEAKY!!! No fluid around the O-ring dipstick. I’m completely lost.

 

[hoffa65]

TV cable seal, been there done that.
Dont over tighten the hold down bolt

I have seen some like of oxidation between the aluminium case and the rubber seal.
Best to drop the pan, remove the cable and inspect from bottom to insure there is not any white looking growth in bore of case

 

[olds307 and 403]

Another I have found that looks like the pan gasket leaking is the selector shaft seal. I have replaced it on the last two 2004R trans I have ran. Look for a trail from where the shift linkage attaches.