Finally got my '34 Brewster Town Car back on the road. Today went about 10th of a mile, down a grade, and heard a horrendous crack. Got out and checked everything underneath, looked OK, still driveable. Went a couple more tenths and it locked up completely, slid both rear wheels about 25 feet, couldn't go forward or back. Played with the shifter and finally got it to go forward. Very slowly drove it back and put it in the shop. My first thinking was transmission, sliding gears not totally disengaging or sliding together? Then I wondered if maybe rear end? Both rear wheels locked at the same time and released at the same time. Now has a slight click in the drive line which wasn't there before. ANY IDEAS would be a big help! Thanks, Don