Ok, I am new to this zero turn stuff but I am a good engine mechanic. I can across a 2004 RZT 42 with (what the owner said) was a blown motor all apart. I swapped motors with a known good one and I can start it up, but when I try noving it, the pumps do nothing- not even a noise. In teh front of both transmissions there is a linkage that pulls out to be able to move the tractor bypushing it. I put those back in and still nothing. The parking brake is off... I get nothing when I move the arms nack or forth. Is there an electrical bypass for these transmissions or something I'm missing? I couldnt see how to check the fluid, and I doubt BOTH transmissions are either blown or low on fluid... but I guess its possible... any ideas?