I bought a Toyota Belta 1.3cc 2SZ engine 2006 model with a CVT gear. For two years it ran smoothly. Three months ago while accelerating or while going uphill i noticed that the transmission jerks as if it cannot shift gear smoothly. With time the jerks got severe. The mechanic said it needed to be replaced so I got it replaced with another one (a kabuli one which means a used one). After replacement the mechanic said to drive it very slowly for about 300 km and not to accelerate quickly to complete the RUNNING of the new gear. I took every care not to put too much pressure on the new gear box. But it soon started showing the same problem. There is no jerking when driving below 50/60 kmph but after driving it for half an hour it starts jerkingr when I am going uphil even at 10 kmph and try to accelerate the gear starts jerking. I have tried replacing the car computer (G2, B2 and J7) and recalibration but the problem persists. The fresh transmission oil i put in the new gear is tc.I have no clue about the problem. My mechanic seems uncertain too. Pls help.
