We have an 02 4x4 quadcab with an automatic 27000 mi. Seems like it shifts to quickly from 4th to overdrive. You hardly know 4th is there. 1st-2nd-3rd-very short, quick 4th-then into lugging 5th. Up hill, flat ground or towing. Doesn't seem to matter. Also if going uphill and step on accelerator...