DRIVETRAIN-TA65 Star 28 7. TRANSAXLE A. GENERAL DESCRIPTION TA65 star is similar transmission as current TA65 as regards the architecture of input shaft, lay shaft and differential final drive, bearings and oil seals. The transmission TA65* 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. Movement of gear shift lever / knob is transmitted through gear shift cables and shift /select levers on transmission to the selector shifting finger. 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 employees cable shift in place of current rod shift for TA65. The advantages of cable shift over rod shift are: Better end stop feel. No gear shift lever vibrations. No gear lever rocking Ease of routing / packaging, better serviceability. 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.
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