2012 Lexus LFA manual transmission

16
Engine protection mechanisms
The LFA’s 1LR-GUE engine generates a maximum output of 412 kW (553 HP) at
8,700 rpm and delivers 90% or more of its peak torque of 354 ft•lbf (480 N•m,
48.9 kgf•m) between 3,700 and 9,000 rpm. The engine features a number of
protection mechanisms to ensure longevity and maintain peak performance.
A number of driving restrictions will be in place until the total mileage shown on the
odometer exceeds 310 miles (500 km). This break-in period serves not only to
protect the engine, but also to preserve the transmission, suspension and the vehicle
as a whole. It is recommended that during this time the owner become familiar with
the LFA and avoid high-load driving maneuvers.
One engine protection mechanism in place beyond the break-in period is the limiting
of maximum engine speed when the engine is cold. When the vehicle is cold started,
various components within the engine begin to warm up and expand at different rates.
Forcing the engine to operate at high speeds in this condition can cause accelerated
engine wear. For this reason, the maximum engine speed is limited when manually
shifted driving modes (SPORT, NORMAL, WET) are selected and restricted to a set
range when AUTO mode is selected.
This engine speed limitation does not indicate a malfunction with the vehicle. Warming
the engine up by driving, rather than extended idling, is recommended.

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 configuration.
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 specific amount
of preload dialed in has been adopted to ensure excellent traction and handling stability.
TORSEN
® LSD is a registered trademark of JTEKT. 4th

117
Index
Inclination sensor deactivation 102
Independent throttle bodies 32
Independent throttle valves 32
Individual throttle bodies 32
Input shaft 38
Instrument cluster 57
Insufficiently charged battery 94
Interior care 82
Interior materials 82
JJumping the vehicle 98
Jump-starting the vehicle 98
KKingpin inclination 47
LLap Time 72
Lap Timer 67, 72
Launch control 33
LCD 56
Leather care 84
Leather cleaning 84
LFA-specific floor mats 22
Limited maximum engine speed
during break-in period 17
Limited maximum engine speed
in extremely low temperatures 17
Limited maximum engine speed
in neutral gear 17
Limited slip function 39
Lock-to-lock 45
Long term storage 92
MMaintaining the Alcantara® areas 85
Maintaining the CFRP
(Carbon Fiber Reinforced
Plastics) areas 86
Maintaining the genuine leather
areas 84
Maintaining the polycarbonate
resin glass 87
Maintaining the rear quarter
window 80
Maintaining the resin areas 87
Maintaining the Satin fi nish
metal accent 87
Maintaining the vehicle’s exterior 78
Maintaining the vehicle’s interior 82
Manual 41
Manual transmission 39
Manually accessing the fuel filler 95
Manually releasing the parking
brake 96
Manually shifted driving mode 27
Manually unlocking the fuel
filler door 95
Manually unlocking the rear hatch 95
Matte Black 81
Matte finish 81
Meter 66, 57
Minimum ground clearance 100
Minimum turning diameter 46
Multi-link rear suspension 47