GM Service Manual Online
For 1990-2009 cars only

Gear Range

1-2 Shift Solenoid Valve

2-3 Shift Solenoid Valve

Ratio

First

ON

ON

2.87:1 to 2.97:1

Second

OFF

ON

1.52:1 to 1.62:1

Third

OFF

OFF

0.95:1 to 1.05:1

Fourth

ON

OFF

0.65:1 to 0.75:1

Reverse

ON

ON

2.33:1 to 2.43:1