I just had a rebuilt transmission and engine intalled in my 92 Sport. The engine runs fine but the transmission doesnt downshift from OD to 3rd without bucking back and forth until i manually shift it into 3rd. Same thing with the lower gears only not as much bucking. Also, the car will accelerate through the gears fine except it shifts into OD at about 35 to 40 mph. I think that is a little early. Question is what needs to be adjusted so that the car can down shift smoothly and upshift at desired shift speeds ?