Torque Tube - Lexus LFA Owner's Manual

Torque tube

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Employing a torque tube to unite the front-mounted engine with the rear-mounted
transaxle creates an outstanding level of powertrain rigidity.
This aspect is essential in order to extract the most performance out of a vehicle. A
rigid powertrain reduces parasitic losses that occur from unwanted engine movement
and input from the wheels, allowing a greater amount of power to be sent to the road
and a more direct response.
Torque is transferred by means of an input shaft housed within the torque tube. This
fast-spinning shaft is mounted using rubber insulators with integrated bearings to
ensure quietness.
Input shaft
Front counter gear
Rubber dampers with integrated bearings
Input shaft
Crankshaft axis
Front counter gear
Torque tube
A front counter gear is employed,
allowing the engine to be placed
closer to the ground. The engine
crankshaft axis is lower to the
ground than the input shaft axis.
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