First off, welcome!t The shaft is not turning and power steering is not working,,i think it may be a beijing pin,that would cause the mower to be pushed and free wheel i assume..will take the shaft out later today and see


yes on 55 2dr post bel air Thank you for the info
Second, that appears to be a 1955 Chevrolet Bel Air 2 door post.
Third and most important, check to ensure the hydro pump is turning. Since your unit has power steering, does that function at all? The spirol pins are known to shear, but appear intact on the visible outer portions of the driveshaft. If the pump is turning, make sure you have full clean Hy-tran hydro fluid. If that checks out, replace the spin on hydro unit filter. Also check your shift linkage for correct attachment and worn parts. If all of that checks out, yo have a very rare case of a failed hydro unit. They are fairly simple to tear into.