I totally get that, but like AJ said: with the throttle pressure lever all the way back, you can't hurt the trans. Given the rest of your setup, you're not likely to hurt anything else either.
If something is messed up inside causing an issue, it's already too late to save it by babying it (but this is highly unlikely).
So let it all hang out and see what she does.. Just my opinion, worth the price paid for it ;)
