Got a BMW 3 SERIES auto,the automobile jerks when a upon a reduce gears,the garage pronounced when a automobile is negligence down a rigging box is anticipating it formidable to tumble upon to a aloft gears as a result jerking,the mechanism indicates no faults upon a rigging box,the garage says rigging box needs to be transposed ,i have my doubts suspicion would get a experts opinion.Could it be injector oil or someting elementary similar to that,please help.Thank you.
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