Reverse

With 4L60 (700-R4) Transmissions - 4WD Shown, 2WD Similar:

REVERSE

REVERSE INPUT CLUTCH - APPLIED
LO AND REVERSE CLUTCH - APPLIED

When the selector lever is moved to the Reverse (R) position, the manual valve is repositioned to allow line pressure to enter the reverse passage which directs oil to the following:

1. Lo and Reverse Clutch
2. Reverse Input Clutch
3. Reverse Boost Valve
4. Lo Overrun Valve

Reverse oil is orificed at the retainer and ball assembly, and regulated at the lo overrun valve to apply the lo and reverse clutch.

Reverse oil is orificed into the reverse input clutch and orificed out of the reverse input piston for a smooth apply of the reverse input clutch during the shift.

Reverse oil acting on the reverse boost valve in the pressure regulator will boost line pressure to approximately 670 kPa (100 psi). Modulated Throttle Valve (M.T.V.) oil from the line bias valve acting on the Throttle Valve (T.V.) boost valve, in the pressure regulator, will further boost line pressure from 670 kPa (100 psi) at idle to 1690 kPa (245 psi) at full throttle.

SUMMARY

The reverse input clutch is applied. The lo and reverse clutch is applied. The transmission is in Reverse (R).