LO Range-Valves In 1ST Gear Position

In this range, the forward clutch is applied and the lo and reverse clutch is applied. The transmission is in Lo range-first gear.

Maximum engine braking can be obtained at speeds below about 40 mph with selector lever in Lo range. Lo range oil pressure is the same as intermediate (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 T.V. spring will close the 1-2 shift valve at speeds below about 40 mph. This permits lo oil to enter the lo 1st passage where it seats the lo 1st check ball and passes through an orifice to the lo blow off valve which exhausts to 1st oil down to 35 psi. The lo 1st oil is then directed to seat the lo and reverse check ball and to the lo and reverse clutch for a smooth apply.