This is the one and only fluid release auto shift transbrake for the 4L80E transmission. Deep pan not required. Transmission brake can be applied in the D3 range and will shift automatically, or can be placed in the D1 range giving the driver full control over the wide open throttle shift points. Redesigned oil circuitry provides super positive gear changes, increased torque capacity and instant transmission brake release for the ultimate in efficiency, performance, and durability. Includes complete valve body with new internal wiring harness, all new solenoids, and new pressure manifold. Fits 1991 thru 1995 models.