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hello guys, i ve a for taurus 95 and lately the trans.. has been acting weird...
first , in the past year, when it has to shift.. shift a little bit retarded and try to make a pull or something like that, well that wasnt the big prob, but recently, got stucked on the first shift, and didnt make any more shifts, i take the car to a mechanic  and he suggested that need to reconstruct the hole trans with new parts, but.. i dont know what to do,

another thing is that, a week ago, it function normaly but suddendly it stuck in the second shift, and it doesnt change, turn it off and on and nothing it is stuck in second shift... so... im thinking to change the trans oil.. maybe that would help...
any suggestions??? or maybe add an additive?.... something