Produces smooth, firm, light-throttle shifts and solid, decisive heavy-load shifts. Eliminates excessive clutch slippage. Extends transmission life. Easy to install. For E4OD automatic transmission. For E4OD and 4R100 automatics. Produces smooth, firm, light-throttle shifts and solid, decisive heavy-load shifts. Eliminates excessive clutch slippage. TransCommand is an automatic-transmission-management computer that delivers functions that no single module can. The E4ODs and 4R100s - used in full-sized Ford trucks and vans since 1989 - have soft, car-like shift characteristics. Many truck owners prefer firmer shifts, especially when hauling large loads. TransCommand is the quick, efficient cure. The electronic module senses the load and commands the transmission to raise the hydraulic pressure accordingly. Light-throttle shifts are smooth and firm, while full-throttle or heavy-load driving produces solid, decisive shifts. Excessive clutch slippage is eliminated, extending transmission life. Built with high-temp, solid-state components. Easy to install. (Required with Sidewinder turbo, Stinger and PowerPack systems for Ford 6.9/7.3 and Power Strokes equipped with E4OD/4R100 automatic transmissions)