I NEED HELP I CAN'T DO PHYSICS FOR MY LIFE
Well it all depends on if the tranny or any part of the drivetrain actually made contact with the ground. If it was strictly all suspension, then no it should not cause any tranny problems.
I would consider a model a mechanistic explanation of a theoretical process. It is a hypothesis in the sense that one is proposing that a process procedes according to the model mechanism. One can disprove the mechanical model through testing, and thus it would be a hypothesis. This doesn't exactly address your question. You need to consider your definition of model in terms of how hypothesis has been defined for you. The reason for the question is to show that you understand the working definitions in both gross and fine senses. But I would consider a model a hypothesis according to how I understand the terms.
Any material used for a mold with resin has to be treated with separator to keep the resin from gluing to the material and I would expect that play-dough would require more care than some other materials that are less porous and moist. You will have to at least do a test run with a small mold, your best guess as a separator and a carefully mixed small quantity of resin to see if it releases. Small amount of resin are often difficult to handle, so you may wish to do your test with 3 or 4 small mold samples at once with different separators.