Updates In Automatic Transmission TF80-SC Generation 2

Fig 1: Tapered Bearing, Torque Converter

Courtesy of VOLVO CARS CORPORATION

Fig 2: TCM, Solenoid, Seal Rings, And Friction Pad

Courtesy of VOLVO CARS CORPORATION

1. Tapered bearings  - To reduce the inner friction losses, some of the tapered bearings now have bigger diameter and shorter length of bearing rollers. This change gives fewer rollers and thus less friction.
2. Torque converter  - To reduce noise/sound when locking at lower engine RPM, the LTD (Long Travel Damper) has been provided with an inner circle of damping springs
3. TCM  (T  ransmission C  ontrol M  odule) - TCM has the same hardware as before but the software has been changed.
4. Solenoids  - Faster shifting has been achieved by making all linear solenoids that control the clutch systems more effective. This change has been achieved by removing the hydraulic part of the solenoids. Further, the magnetic flow in the solenoid has been increased and gap between thrust piston and magnetic coil has been reduced to increase power.
5. Seal rings  - New seal rings with smaller sealing surface contributes to reducing the inner friction. By tapering the seal, the sealing surface is reduced as is the pressure on the sealing surface.
6. Friction pads  - The new friction pads on the discs reduce the impact of drag losses between the friction pads. This has been achieved by optimizing the oil flow channels between the friction surfaces.