Report: Mercedes-Benz Working On Nine-Speed Automatic

[Rolf]

I remember when the 7G-tronic came out they mentioned it weighed approx. 80kg, is this 9G-tronic gearbox actually lighter than this? Is there any mention about how much it weighs?

This is the cutaway of the 7G-tronic for comparison.

 

[Wolfgang]

^ It's supposed to be lighter than the 7G-TRONIC Plus.


Compact lightweight construction: reduced weight with the same installation space

With the change in generation from the 7G-TRONIC to the 9G-TRONIC, the development engineers placed further emphasis on the area of "compact lightweight design". Despite two additional gears and a maximum transferable torque of up to 1000 newton metres, the new automatic transmission requires just as little installation space as its predecessor, the 7G-TRONIC PLUS, and is also one kilogram lighter.

The two-piece housing design has been retained: the torque converter housing is made of lightweight aluminium alloy. The transmission housing with a weight-optimised plastic oil pan is made of an even lighter magnesium alloy.

Daimler