Jerry, does the vacuum shift on a 55.2 2-ton work the same? Mine was in low, I turned the engine off and was coasting slowly down the driveway yo the shop, I was using the park brake to keep it slow (was going to let the clutch out if I need more stop power as well) but the rear came out of gear and now I was free-wheeling towards my shop and my 58! (not a good day for the 55!)