GM Service Manual Online
For 1990-2009 cars only

The 3T40 transmission consists primarily of the following components:

    â€¢ A four-element hydraulic torque converter
    â€¢ A compound planetary gear set
    â€¢ A dual sprocket and drive link assembly
    â€¢ Three multiple disc clutches
    â€¢ One roller clutch
    â€¢ An intermediate band assembly
    â€¢ A valve body assembly
    â€¢ A vane type oil pump