The basic 1932 Model B four cylinder transmission case is shown above. Unlike the Model A, the Model B integrated the three-speed transmission case and the clutch housing into a single iron casting.
Internally, all of the gears, bearings, and shafts are interchangeable with those used in the V8 transmission. The transmission cases themselves however are different between the four cylinder and the V8, as well as different between 1932 and 1933-34.
Additionally, many people also are not aware that the 1932 Model B and 1933-1934 Model 46 flywheel housings are also different from each other, and are not fully interchangeable.
The proper flywheel housing is determined by the vehicle usage as well as the transmission case style. The Model 46 is shown on top, and the Model B is on bottom in the pic above.
Shown above is the 1932-only Model B transmission case mounted to a 1932 Model B flywheel housing.
The Model B uses a flywheel housing which has separate steady rods and mounting brackets bolted on each side, shown above.
The pic above shows the 1933-1934 Model 46 transmission case mounted to a 1933-1934 Model 46 flywheel housing.
The Model 46 uses a flywheel housing which has the steady rods mounted directly to holes passing through the flywheel housing in the fore-aft direction. There were no separate steady rod brackets.
The Model 46 three-speed transmission case has a corresponding clearance notch in the bolt flange to provide clearance to the steady rod mounting in the flywheel housing.