above 15 to 20 mph it gets really scary

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Maybe thirty? I've tried it, and the speedometer doesn't work that way. I didn't blow my tranny, but you shouldn't try it in a car you depend on.

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35-40 mph... I'm an excellent driver

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its really hard to say there a lot of varibles include type of car, the engine, tires, transmition, if its restricted, tempature, what your driving on. many other things<br />
i have seens a modifyed cas doing 80s in reverse but it was not street legel

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