Shift Kit for a 727

this is the transmission i have ..

StreetFighter® Transmissions


The TCI® StreetFighter® transmission is tough enough to withstand the rigors of even the toughest street machines. It is ideal for vehicles powered by engines producing 450 horsepower with a non-supercharged system using pump gasoline. Equipped with our 100% tested, Manual/Automatic valve body, most units allow you to manually shift the vehicle into each gear change or, by placing it in the drive position, remain fully automatic. In either mode, you get a racetrack shift that bangs through the gears and shaves time off your ET's. When you use the manual gear selection feature, the StreetFighter® upshifts and downshifts right when you move the lever, with no lag or governor override. When you select the normal drive position, the transmission retains positive, automatic shifts for the ease of driving you look for in an automatic transmission.



The TCI® StreetFighter® transmission features: special clutches and bands, an improved lubrication system, new sprags/roller clutches, chrome-plated, TCI®-logo transmission pan, increased thrust capacity, higher line pressure for extra firm shifts & greater torque capacity with less slippage, as well as being TCI® factory blueprinted, inspected and dyno tested.

now point being ..why is it and has always shifted like a limp wrist if it claims snappy ?