Do antifreeze and transmission fluid mix
May 12, 2009 3:45 PM Subscribe
Someone I know (cough me /cough) put antifreeze in a transmission. Will it blend?
posted by toomuch to Travel & Transportation (10 answers total)
This person discovered a very large puddle of red fluid under their car this weekend. I, um I mean they, assumed it was transmission fluid even though it smelled sweet and the only fluid that indicated low was the coolant reservoir. A drip pan was installed beneath the car to capture whatever fluid remained. About six quarts came out all told.
One of those quarts was poured into the transmission via the dip stick for fear that driving the car even one mile to the mechanic with a transmission leak would be very bad. Once at the shop, the mechanic determined it was a bad hose, not anything related to the transmission. Apparently, GMC puts something called Dexcool permanent anti-freeze in their cars and it is red, not the normal green one would expect of coolant. Our hero wonders if they should have the transmission flushed and if even that will save this transmission from certain doom?