2012 Lexus LFA Owners Manual - Page 453

39

Shifting

■

Rear transaxle

The LFA’s gear change mechanism consists of a parallel two-shaft layout often used

in modern manual transmissions. In the LFA, the transmission and differential are

integrated and placed near the rear axle, thus realizing a rear transaxle con±guration.

Gear shift and select commands are sent by the ECU to a hydraulically operated shift

mechanism for fast and precise operation.

To ensure ample strength and the ability to handle the engine’s broad torque curve,

various areas throughout the transaxle have been reinforced and high-capacity three-

point contact bearings have been adopted. Furthermore, each synchronizer ring

employs a high-friction carbon material to realize quicker engagement and faster

shifts. Additionally, the teeth of all speed gears have been micro-polished for precise

engagement and reduced gear whine.

The transaxle employs its own oil pump and oil cooling system to ensure a constant

supply of oil at a stable temperature even under demanding endurance conditions.

3rd

6th

5th

2nd

1st

Support bearings

Regarding synchronizers, 1st through 4th gears employ triple-cone units while 5th and 6th

gears are double-cone. A TORSEN

®

LSD (Limited Slip Differential) with a speci²c amount

of preload dialed in has been adopted to ensure excellent traction and handling stability.

TORSEN

®

LSD is a registered trademark of JTEKT.

4th