GM Service Manual Online
For 1990-2009 cars only

Shift Solenoid Valve State and Gear Ratio (4T45-E)

Gear

1-2 SS Valve

2-3 SS Valve

Gear Ratio

1

ON

OFF

2.96:1

2

OFF

OFF

1.62:1

3

OFF

ON

1.00:1

4

ON

ON

0.68:1

P, R, N

ON

OFF

2.14:1