No 3rd or 4th unless shifted manually 2000 SE
 

I have a 2000 Bonneville SE that will not move in 3rd or 4th gear from a stand still but if I shift down into 1st or 2nd it will take off as long as I am easy on the gas pedal and then when it gets up to about 2000 RPMs or more I can shift up to the next gear and after I feel it grab I can give it the gas and it will go like nothings wrong. This works in 3rd and 4th gear too. If I don't wait till I feel the shift grab or if I press the gas to hard it will slip and shudder until I let off and let it catch then as I said its like nothings wrong. I just bought the car and I appreciate any help I can get .. Thanks