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4th Gen Ram Tech2009 - 2018 Rams and the 2019 Ram Classic: This section is for TECHNICAL discussions only, that involve the 2009 - 2018 Rams and the 2019 Ram Classic. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Noticed a neon green liquid ddrippdripping under my 2016 ram 1500. Truck just sat for a month at a park n fly since we were away ok vacation. After investigating I found it was coming from what looked like the radiator area. After further investigation it might be the transmission condenser? Leak appears to be coming from a large hex plug on the bottom. Is this coolant or transmission oil? Can I just try to tighten it and do you think I need to service the transmission if it's tranny oil? See picture, note the neon color fluid around the hex bolt top left
I've never seen green transmission fluid, but green has been a common coolant color for many years. Have you tried sampling a bit of the liquid between your fingertips to see if it feels oily or if feels thin and a bit tacky like coolant? I'm 98% sure it is not transmission fluid, but will be coolant. Your local auto parts store may have a cooling system pressure tester in their Loan-a-Tool program which will allow you to pressurize the cooling system to the appropriate pressure to check for leaks that only occur under pressure.
As for trying to just tighten the plug, since that plug is at the very bottom and a natural place for a fluid to collect after sitting due to gravity, you should confirm that the leak isn't from higher up the radiator. If you determine it still appears to be coming from that plug though, then if this truck is your daily driver I'd suggest you locate a new radiator before attempting to turn that plug as there's a chance you could make things worse. I've not heard of anyone trying to rotate those plugs/caps before to know if they are threaded, plastic welded, or what.
Coolant leak?
