Test Four (Selector In Reverse)

1. Attach 300 psi gauge to low-reverse port.
2. Operate engine at 1600 rpm for test.
3. Move selector lever on transaxle four detents forward from full rearward position. This is selector R position.
4. Low/reverse pressure should read 180 to 220 psi with throttle lever clockwise. Pressure should gradually increase to 260 to 300 psi as lever is moved counterclockwise.
5. This tests pump output, pressure regulation, and condition of front clutch and rear servo hydraulic circuits.
6. Move selector lever on transaxle to D position to check that low/reverse pressure drops to zero.
7. This tests for leakage into rear servo, due to case porosity, which can cause reverse band burn out.