1 - 2 - 3 - 4 - 5 Reverse Clutch Applied
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
1 - 2 - 3 - 4 - 5 Reverse Boost Solenoid
The 1-2-3-4-5 reverse boost solenoid is energized allowing ACT FD fluid to enter the S8 ON/OFF BOOST SIG fluid circuit.
1 - 2 - 3 - 4 - 5 Reverse Clutch Boost Valve
S8 ON/OFF BOOST SIG fluid enters the 12345R clu boost valve applying pressure against the 12345R clu boost valve spring force. This allows 12345R CLU fluid through orifice #33 into the 12345R clu boost valve then into the 12345 CL KNOCKDOWN fluid circuit.
1 - 2 - 3 - 4 - 5 Reverse Clutch
12345 CL KNOCKDOWN fluid enters the 1-2-3-4-5 rev clu piston applying force with the 1-2-3-4-5 rev clu piston return spring.