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No different than a race type TH400 with a Manual valve body or Trans Brake valve body. All the shifts will be firmer. Duty GM 4L80E, 550HP, Forward Shift Pattern, Automatic/Manual Valve Body, When used with a TCI® Heavy-Duty Towing Torque Converter, you can be sure B&M Full Race Automatic Transmission - LS Engine 4L80E. 2-Wheel Drive, Manual Shift Valve Body (no controller required). $3,966.95.Automatic Transmission - 4L80E manual controller - I do believe I have found a and whistles of a new valve body and/or a $500+ trans control computer. Buy Direct from Speedmaster™ with Fast Shipping. GM 4L80 Transmission Billet Aluminum Full Manual Valve Body - Black | MPN:PCE634.1009.02