Originally Posted by SoNic67
Automatic transmissions, with traditional hydraulic systems and torque converter, always overlap gears via the clutches. That's why they shift so smoothly compared to the manual gear shifts, where one can feel the slight "gap" in engine thrust (acceleration) between two gears. The slippage is controlled by the hydraulic pressure, so shorter slipping times will do well for the clutches.
Side note - The Automatic Dual Clutch transmissions are basically electrically controlled manual transmissions. They use those two clutches to simulate a smooth shifting by holding two gears at transition time (with added extra wear of course).
But... I had one torque converter shaft splines shear off, so, depending on the design and the actual torque reserve, yours might shear too. In my case it was sudden.
Thank you for the information! Just curious what kind of vehicle/transmission you had that the torque converter splines sheared off?
Automatic transmissions, with traditional hydraulic systems and torque converter, always overlap gears via the clutches. That's why they shift so smoothly compared to the manual gear shifts, where one can feel the slight "gap" in engine thrust (acceleration) between two gears. The slippage is controlled by the hydraulic pressure, so shorter slipping times will do well for the clutches.
Side note - The Automatic Dual Clutch transmissions are basically electrically controlled manual transmissions. They use those two clutches to simulate a smooth shifting by holding two gears at transition time (with added extra wear of course).
But... I had one torque converter shaft splines shear off, so, depending on the design and the actual torque reserve, yours might shear too. In my case it was sudden.
Thank you for the information! Just curious what kind of vehicle/transmission you had that the torque converter splines sheared off?