#transmission fluid in coolant why? 2001 Honda Civic EX
granite hearth
leak in your transmission cooler or failed seals between cooling lines and the engine block or radiator are likely culprits
visual wigeon
This is automatic I’m assuming since you have transmission fluid in your radiator
Your transmission has oil lines that run into the radiator so that the radiator can help cool the oil.
Your radiator is clearly mixing the two.
I would take your trans to a trans specialist. This most likely destroyed your transmission.
lament parrot
Probably. It still drives though so it could be rebuilt. But still. How tf did they mix with a new radiator and lines