Clutch; Outline; Transmission/Transaxle Features; Clutch Specifications - Mazda RX-8 2004 Service Highlights

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TRANSMISSION/TRANSAXLE FEATURES

CLUTCH

Increased torque
transmission capacity
MT
Improved operability
Improved driveability
Improved fuel economy
Improved marketability
Improved reliability
Mis-shift prevention
AT
Superior shift quality
High efficiency,
compactness, lightweight
Improved reliability,
reduced NVH (noise,
vibration, and harshness)
Improved driveability
Improved marketability
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CLUTCH SPECIFICATIONS

Clutch control
Clutch cover
Clutch disc
Clutch pedal
Clutch master cylinder inner diameter
Clutch release cylinder inner diameter
Clutch fluid type
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05–00–2

OUTLINE

• The clutch cover set load has been increased.
• Torsional spring tension has been reduced to reduce NVH.
• A ball-type synchromesh mechanism has been adopted.
• A triple synchronizer mechanism has been adopted for 1GR, 2GR and 3GR.
• Bushings for the control rod have been adopted.
• In order to obtain more power from the engine, the total gear ratio has been reduced in speed
and set in a cross pattern.
• To improve drivetrain rigidity, a closed section power plant frame (PPF) has been adopted.
• Six-speed Y16M-D manual transmission has been adopted.
• Six-speed Y16M-D manual transmission has been adopted.
• A double engagement prevention mechanism (interlock mechanism) has been adopted.
• A reverse lockout mechanism has been adopted.
• Direct electronic shift control by duty-cycle solenoids has been adopted.
• Feedback control system has been adopted.
• Centrifugal balance clutch chamber has been adopted.
• A plate-type clutch pack replaces the band brake in the 2-4 brake.
• Shifting assist at high engine speeds has been achieved due to adoption of an engine-
transmission total control system.
• A miniature trochoid gear oil pump with torque converter direct drive has been adopted.
• Due to complete electronic control of clutch engagement and release pressure, the forward
one-way and overrunning clutches have been eliminated.
• Due to the adoption of direct electronic clutch pressure control (direct electronic shift control),
the accumulators have been eliminated.
• A pleat type oil strainer with fine mesh has been adopted.
• A highly rigid transmission case has been adopted.
• To improve drivetrain rigidity, a closed section power plant frame (PPF) has been adopted.
• A control feature for climbing/descending hills has been adopted, improving driveability when
climbing/descending.
• The Sport AT has been adopted. With this feature up and downshifting can be performed with
either the shift control switch on the steering wheel or with the one-touch operation of the
selector lever.
Item
Spring type
Set load
Outer diameter
Inner diameter
Type
Pedal ratio
Full stroke
(N {kgf, lbf})
(mm {in})
(mm {in})
(mm {in})
(mm {in})
(mm {in})
SAE J1703 or FMVSS 116 DOT-3
CHU050001030S02
CHU050001030S03
Specifications
Hydraulic
Diaphragm
6,470 {660, 1,455}
236 {9.29}
160 {6.30}
Suspended
5.7
130 {5.118}
15.87 {0.6248}
19.05 {0.7500}