would a cup of brake fluid hurt the transmission?


Asked by Sep 15, 2013 at 08:54 PM about the 1999 Volvo S80 2.9

Question type: Maintenance & Repair

do i need to change the transmission fluid? I put about a cup of brake fluid in by mistake.

2 Answers


Brake fluid will swell and destroy all the rubber inside your transmission. These rubber components fit certain parts exactly allowing the correct flow to cause the various functions of the transmission. Swelling and deterioration of these will cause improper function of the transmission. I would get the transmission fluid changed out asap.


Bonniebomb...does this help answer your question? Hope so :)

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