Black liquid in coolant tank??

Asked by May 16, 2015 at 12:49 AM about the 2000 Honda Civic Coupe

Question type: Maintenance & Repair

I took my car to a mechanic in which they
came to the conclusion oil is leaking into it...
However car does not overheat and trans
fluid appears to be low due to trouble
shifting into gear/idle hesitation.. Could it be
trans fluid? If it is approx how much for
repairs?

1 Answer

232,115

Could be trans fluid, if it was never changed and is brown instead of red. Do not continue to drive the car if that is your case. You will need to flush the transmission, replace the radiator, and flush the cooling system. Because the trans cooler is usually part of the radiator and when it fails the fluids combine. Water/coolant in a trans is not good.

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