This valve body (17875XA) has a safe clean neutral and no need to use a button to backup. A clean rear band apply and release making it a great race or street valve body and No roller clutch failure. Provides full manual control only. No automatic features. Maintains stock shift pattern. Allows full engine braking (slow down) of vehicle by down shifting. This valve body is great for Drag Racing, Rock Crawling, Mud Bogging, Sports Car Racing and Pro Street. Eliminates use of passing gear linkage.