Date: Mon, 27 Aug 2007 07:52:48 -0400
From: Fred W <>
Subject: Re: Wrong fluid - help!

Talisker wrote: > I just topped off my brake fluid with transmission fluid. Bad idea, I > was not paying attention. > > I suctioned out what I could and then filled it with brake fluid - DOT3. > Then I realized it should be DOT4. Suctioned that out too. > > I haven't started the car so figure there has been no circulation yet. > How much damage did I do? Should I have the car taken in for some work > before I run it? > > It's a 98 Saab 93, my daugher's car. > > Gary AS others have said, it is unlikely the ATF has migrated into the system, but best to flush the brake lines. By the way, there is minimal dfference between DOT3 and DOT4 brake fluid. They are both glycol based fluids and can be mixed in a pinch. The only real contamination would be having the ATF fluid in there. DOT5 is where the fluid changes completely to a silicon base and is not compatable with the earlier spec fluids. And no, you do not want to use DOT5 fluid. -- -Fred W

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