lately i have been having trouble with shifting into 1st and 2nd gear. To get it into 2nd i have to play with it until it goes into gear and it wont go into 1st gear unless it already in 2nd. 3rd, 4th, 5th, and reverse all work fine. Also i did just purchase a short shiftier, it same as stock but 2in shorter; people have been telling that was the cause. Could someone help me with this?