Info for you
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New User
Joined: Jan 2003
Posts: 12
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Info for you
I have a 90 ranger 4.0 a4ld transmission
my shifting was acting up so i put a pint of
brake fluid in the trans drove the truck for a
week or 2 and the trans started shifting purfectly
then i changed the fluid and filter and all is good
My father was a mechanic before he retired and told
me it would not hurt the transmission by putting
brake fluid in trans.
Allso you can put a quart of transmission in your engine
to clean your engine.
my shifting was acting up so i put a pint of
brake fluid in the trans drove the truck for a
week or 2 and the trans started shifting purfectly
then i changed the fluid and filter and all is good
My father was a mechanic before he retired and told
me it would not hurt the transmission by putting
brake fluid in trans.
Allso you can put a quart of transmission in your engine
to clean your engine.
Senior User
Joined: Oct 2002
Posts: 420
Likes: 0
From: Harrisburg USA
Info for you
Quite true. I've done both myself. In the dead of winter, when temps get into single digits & below zero regularly, the tranny fluid in the crankcase is a great thing. If the tranny has begun to leak, the brake fluid can temporarily slow (or even stop) the leak.
Post Fiend
Joined: Dec 2001
Posts: 10,562
Likes: 4
From: South Jersey
Info for you
I have heard of putting tranny fluid in the engine, it has a lot of detergent and can clean it out. I don't know about the brake fluid in the tranny, it is quite different and is very aggressive, it will eat the paint off your truck and will cause seals to swell due to the attack which might be why it seems to fix it. Just my opinion.
Senior User
Joined: Oct 2002
Posts: 420
Likes: 0
From: Harrisburg USA
Info for you
It is very important that folks are aware ... brake fluid is NOT A PETROLEUM DISTILLATE, nor does it contain any. It is basically ethylene glycol (yep, antifreeze), with a bunch of enhancers. Like Ken said, it's nasty stuff. You wouldn't want to use it in places, if you didn't know what you were doing, or why you were doing it. It DOES cause seals to swell (petroleum resistant seals), which is why it should probably be a last resort, or pretty close to the last resort. I wish I had mentioned this in my first reply.
Junior User
Joined: Oct 2002
Posts: 80
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Info for you
A bottle of trans medic would do the same thing. The only bad thing about the brake fluid is that if you didn't get it ALL out, then it will continue to eat at the seals and rubber parts in the tranny and the cooler lines as well. Then it $$$$$$$time.
