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TA65 Star AMT
2
2. TRANSAXLE GENERAL INFORMATION
GENERAL DESCRIPTION
TA65 star AMT is similar transmission as current
TA65 star as regards the architecture of input
shaft, lay shaft and differential final drive, bearings
and oil seals. The transmission TA65* AMT
provides five forward speeds and one reverse
speed by means of three synchronizers and input
shaft, lay shaft and reverse idler shaft and
differential. All forward gears are in constant mesh
engaged through synchronizers and reverse gear
uses a sliding idler gear arrangement.
All the synchronizers are mounted on lay shaft and
engaged with gears on lay shaft. The lay shaft
turns the final drive gear and differential assembly,
thereby turning the front drive shafts which are
attached to the front wheels.
The complete Gear Shifting Mechanism is
controlled by Mechatronic Gear Box & TCU
(Transmission control unit). This is further
transmitted through shifter dogs and shifter forks to
the shifter sleeves and synchronizers.
Interlock piece is provided to prevent double
engagement of gears. Inhibitor is provided to block
direct shift from 5th gear to Reverse gear which
guides the shift lever towards 4th gear. Central
detent is provided for distinct position of gears
about neutral position.
CHANGES AND BENEFITS OVER TA65:
The major areas of change and benefits over TA65
are:
1.
The internal and external gear shifting
mechanism and arrangement. TA65 star AMT
employees Auto Shift using AMT Kit in place of
current cable shift.
The advantages of Auto Shift over cable shift
are:
A manual transmission requires the driver to
be engaged in shifting the gears, while an
automatic transmission changes gears for
you.
Driver don’t have to worry about
coordinating between the clutch, throttle,
and gears
Driver can give more attention on Road
instead of thinking about gear position.
2.
Twin cone carbon lined synchronizers for first
and second gears to replace single cone brass
synchronizers. Benefits are improved shift
smoothness, reduction in shift efforts and
enhanced life of synchro cones.
3.
Deletion of intermediate plate and its integration
into housing front half. This has improved the
housing rigidity and accuracy of gear train
positioning thus helping reduction in noise level.
4.
TA65 star front half housing is 10mm wider than
of TA65 to accommodate increased inertia
flywheel to reduce marching noise. Housings
are strengthened as compared to TA65 by
additional ribs.
5.
Rear cover rubber seal is replaced by liquid
gasket. 8 No’s of bolts are used to mount the
rear cover in place of 3 bolts in TA65.
6.
Mechanical Speedo (pinion and gear
arrangement) is replaced by contact less
Speedo (A sensor and a toothed wheel). This is
to improve reliability of Speedo mechanism and
to reduce complexity in assembling transaxles.