904 dragging in reverse

Was driving the other day. Backed out of my garage no problem. Drove 30 miles pulled into a parking spot. When it came time to leave had to give the motor a bunch more RPM to back out. Dropped my driveshaft from the rear-end. In neutral, It turned freely in one direction. The Forward direction. There was a bunch of resistance tuning in the reverse direction. Is this a broken band or maybe a return spring broken not letting Forward band back off all the way. No noise when doing it. Have not pulled the pan to look yet.
Have you checked fluid level? Low fluid condition will cause you to have to give more throttle in order to move in reverse before forward gears. Mine does this after I let it sit for a couple weeks and it bleeds in the floor. I say I’m gonna fix it every winter.