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The original T-56 was a strong gearbox. The Magnum is much stronger, as illustrated by this comparison of countershafts. The drive gears on the Magnum countershaft (left) have a much wider face width and surface area than the regular T-56's, for greatly increased torque capacity at 700 lb-ft. The one-piece Magnum countershaft is also much more resistant to bending or distortion than is the two-piece T-56's, and has notably larger bearings for improved support. Not shown here, the main shaft is also of notably larger girth than that of the older T-56.