Hello friends I have an Optra Advance and the question is that I repair it in the 4th piston, and the mechanic told me that the 1st and 2nd piston was fine, today it was approximately 10,000 km ago that I did that repair, and my problem is that sometimes the transmission to change to 3rd hits very strong, it should be noted that this happens 1 time per week, that is practically very little, other times, I do not stop. The vehicle changes from a soft to first blow or simply does not change and when accelerated it is in neutral, most of the time the transmission works perfectly, this failure is very little but we know that a vehicle must work perfectly, thanks to those who can help me.
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