05 Dodge Neon


Asked by Aug 16, 2016 at 10:57 AM about the 2005 Dodge Neon

Question type: Maintenance & Repair

Tranny fluid is mixing with the oil and is
coming out of the radiator. any idea what
could be wrong and if it's worth fixing?

5 Answers

Bob Beaman

If transmission fluid and coolant are mixing in the radiator the transmission fluid cooling loop (inside the radiator) has a hole in it letting the 2 fluids mix. You will need to replace the radiator. Don't wait too long cause coolant could also be going into the transmission and that will cause it to fail.


Well it might have already failed cause while the car is in drive it will put itself in neutral causing the engine to rev but not go anywhere. All of this has happened in 2 days.


I'm going to assume that you have an automatic transmission. On many cars the radiator is also used to cool the transmission fluid through separate tubes. Not sure why it would be mixing with your engine oil unless there is a problem with your cylinder head or engine block. Are you sure it's engine oil and not just transmission fluid and coolant leaking? If it is then you probably just have a cracked or bad radiator.


Just flushed the radiator and the water ran clear. Thought it was mixing with Engine oil but it's tranny fluid and coolant mixing..

Tom Demyan

So to simplify, you will need to replace the radiator, flush all coolant and lines, and flush the transmission and associated lines multiple times till it runs red and hope it still shifts. If not, your looking at a rebuild or used transmission.

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