Maximum downhill braking can be attained at speeds below approximately 64 km/h (40 mph), with the selector lever in manual First position. Manual First oil pressure is the same as intermediate 827 kPa (120 psi) because intermediate oil is still present.

Lo oil from the manual valve is directed to the 1-2 throttle valve. Lo oil pressure and the 1-2 TV spring force will close the 1-2 shift valve at speeds below approximately 64 km/h (40 mph). This allows Lo oil to enter the Lo First passage, where the Lo oil seats the Lo First checkball and passes through and orifice to the Lo blow off valve. This valve exhausts Lo First oil down to 241 kPa (35 psi). The Lo First oil is then directed to seat the Lo and Reverse checkball, and the oil is directed to the Lo and Reverse clutch for a smooth apply.

Summary

The forward clutch is applied. The Lo and Reverse clutch is applied. The transmission is in Manual First Gear.