Last night coming down an off ramp at 0 throttle the rpms went to 3500 on their own with no additional forward movement once I touched the throttle it did it again and then I had nothing. Now I have no gears forward or reverse and with a gauge hooked up my pressure at idle in drive fluctuates between 320psi and 75psi. Fluid looks great and no codes so any thoughts before I yank this thing out.