Mower sat outside all winter (Texas), mower will not move fwd. or rev. Jacked the back wheels off the ground and the wheels will move fwd. and rev. Could this be a sign that the transaxle is low on fluid? Why does the brake pedal not engage the brake/stop the mower? Well now . . . thar's not a normal color for trnsaxl fluid is it? Viscosity is about 10/15. Does it look like it it has water contamination?