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
111
Technical information
Clutch and Transaxle
ClutchTypeDry Single-Plate Clutch
Diaphragm Spring
Operation Hydraulic Cylinder
Clutch Cover TypeDiaphragm Spring Turnover
Clutch Disc Diameter 240 mm
Transaxle Type ASG
(Automated Sequential Gearbox)
Transaxle Model RB60M
Front Counter Gear Ratio* 1.259
Transaxle Gear Ratios 1st3.231
2nd 2.188
3rd 1.609
4th 1.233
5th 0.970
6th 0.795
Rev 3.587
Differential Gear Ratio 3.417
Differential Type TORSEN
® LSD
Rear Transaxle Gear Oil Oil Viscosity“LT 75W-85” API GL-5
Rear Transaxle Gear Oil Capacity 5.3 L (5.6 qt., 4.7 Imp. qt.)
*: The front counter gear is lubricated by engine oil.
115
Index
Checking the oil level 69
Clock 67
Clutch 37
Clutch disc 37
Cold starting restrictions 17
Combination meter 57
Connecting an external battery
to start the engine 98
Control characteristics
depending on driving mode 23
Control pad 66
Coolant temperature 60
Coolant temperature gauge 60
Crankshaft 38
Creep phenomenon 37
DDark current (parasitic current) 93
Dead battery 94
Default shift speed setting 41
Departure angle 100
Diaphragm spring 37
Differential 39
Differential oil cooler 39
Digital display 56
Disabling the theft deterrent
system 102
Disabling the tilt sensor 102
Discharged battery 94
Disconnecting the negative (-)
battery terminal 99
Door mirror switches 9
Double wishbone front
suspension 47
Downshift 40
Driving mode 58
Driving mode selection 27
Driving mode selector switch 41
Driving mode selector switch
operation 23
Driving mode-linked variable
throttle response 33
Driving position 20
Driving position adjustment 10
Dry single-plate clutch 37
Dual shaft transmission 39
EECB (Electronically
Controlled Brake) 50
Emergency brake 9
Engine 56
Engine code 16
Engine coolant 60
Engine coolant temperature
gauge 60
Engine coolant temperature
sensor 60
Engine limiters 16
Engine oil pressure 62
Engine oil pressure gauge 62
Engine oil temperature gauge 61
Engine overspeed 70
Engine protection mechanisms 16
