Thread: 66 Mustang trany fluid?

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Originally Posted by Matt167

if your trans runs type F now, you NEED to run type F, if you have it freshly rebuilt, dry, use whatever you want, just you can't switch to somthing else after you filled it up. '66 Mustang Cruisomatic C4 would have Type F originally.

Well we just bought a few weeks ago and who knows what is in it...LOL!

Originally Posted by youther

Well we just bought a few weeks ago and who knows what is in it...LOL!

call the previouse owner and ask what he/she put in it. if you put the wrong stuff in, you likely may need a trans rebuild.