Why would my car start shifting through the gears when in low 1? I put it into 1st gear and sometimes the car will actually shift through the gears. I can also be driving like 25 in 2nd gear and down shift and nothing happens. Then when I contiue to slow down it will get to about 5mph and boom you feel it hit 1st gear from second gear, hard.

What can cause such a thing? It doesn't happen all the time, just about once every 5-10 times I drive. I did just have a new valve body put in the car along with new pressure switch.

Could this be a computer problem? I would think it would be odd to have a compuetr problem out of the blue like this.

Thanks,