I'm concerned if you are leaking coolant from the nut for the transmission (ATF) cooler connection. If the leak is coming from that union it should be bleeding red ATF.

If you get coolant in the transmission the transmission dies pretty quickly as the coolant mixes with the oil to form a horrific emulsion that ain't never coming out with out some serious dismantling and scraping.

(If you want to see emulsion damage in a 722.303 I have pictures in this thread 722.303 in bits photo shoot )

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!