Error Codes P0732 and P1790. Replaced the Speed Sensors and no change. Looked like there was some metal shavings on one of the sensors when I removed the original ones. Truck will only go in first gear, no reverse. Checked transmission pan and found dark grey liquid on the bottom, not sure if it would be considered sludge or not. Could that possibly be a clue. Any info would be helpful. Thanks for reading.