<![CDATA[The gearbox or transmission functions as a power transfer system which transfers and converts power from a rotating motor. In an ideal concept the mechanical energy generated by the transmission will be completely converted into mechanical energy, but in fact there is energy lost into heat energy even though the value is small by 5-10%. According to previous research using software to simulate work rather than transmission, it was found that the greatest heat energy is generated by friction between gears which will be transmitted through fluid flow (lubricant). The method used is by comparing the temperature of the vehicle's transmission before repair (overhaul) with the temperature of the vehicle's transmission after repair (overhaul) and change of lubrication. Temperature data retrieval at 2 different points of the gearbox was carried out using a type K thermocouple with a temperature range of -5oC to 1300oC accompanied by a hygrometer to measure the temperature and humidity of the environment during the testing process which acted as independent variables. Based on the experimental data taken before the repair was carried out, it was found that there were irregularities in the first experiment before the overhaul on the Neutral transmission (N) at speeds of 0, 600 and 1000 rpm, there was a significant increase in temperature at T1 (50-59- 62)oC and at T2 (44-49-58)oC. Furthermore, it was carried out seven times to obtain data variations and the allegations or hypotheses of damage that occurred in the transmission were made according to the results of graphical data analysis]]>
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