The car wouldn't shift out of first gear

I changed the engine oil in the car the day prior, I have always changed it my self. I Backed out of the driveway the next morning to leave for work, the OD light was flashing on the dash, I put the car in drive and proceeded down the road and the speedo wasn't working. I drove about 12 miles, the car seemed to be shifting mostly normal, I stopped at a stop sign, put the car into park and shout off the engine, I restarted the car, the overdrive light had gone off, but the car wouldn't shift out of first gear. I nursed the car home at 15mph, shifting the trans from 1st, to drive, to Od and nothing really made a difference. I got the car home and parked it for about 5 days.
I decided to start the car and see what it would do. I backed out of the drive, all seemed normal. I proceeded down the road about a mile and a half, evertthing worked normal, except the service enging light came on. Two hours later I started the car, backed out of the driveway, and the speedo wasn't working again, and the car wouldn't come out of first again. SO, I had my neighbor who is a mechanic bring over his code reader, the car had a PO500 fault, "speed sensor malfunction". So I replaced the speed sensor on the transmission, on the right side behind the motor mount. Unfortunately this didn't fix the problem. I know transmissions don't just break in the driveway, so I don't think it's a major mechanical problem. Could a abs wheel sensor cause this? The right front brake hose had collapsed and overheated the right front, melting the abs wire, yet the abs light hasn't come on. Any help would be GREAT! Thanks, Jason