well I've tried searchin for this movie by myself but I can't seem to find the name of it, I have plenty of info but the keywords I use to search always come up with stuff like land of the lost or sir arthur conan doyles lost world so here it is, old Saturday morning show mid to late 90s, dad daughter and son in mini van fall in a crack in the ground, later they meet a wild woman named cristina or something like that, she has a monkey man sidekick, there's a t-rex they call scarface and a buncha random mishaps there's a baby triceratops or dinosaur like that they make as their pet and I think that's enough info but I have more just can't remember the name

Are you sure it's not Land of the Lost?
YouTube - 90's Land of the Lost Intro (http://www.youtube.com/watch?v=Lqhof8OvyAI)
http://en.wikipedia.org/wiki/Land_of_the_Lost_(1991_TV_series)

Land of the Lost
YouTube - 90's Land of the Lost Intro (http://www.youtube.com/watch?v=Lqhof8OvyAI)
http://en.wikipedia.org/wiki/Land_of_the_Lost_(1991_TV_series)


That would have been my choice also however the OP has said that Land of the lost was not what they were looking for.

And yes it is the 91 series of land of the lost which never showed in any of my searches the only results I ever got was the will feral movie or the 71 series