4R70W + transgo (problem?)
Today I installed a transgo shift kit in my 99 f150 w/ 4R70W transmission. All went well, no problems taking it apart putting it together etc. When driving it it seems as if I can only catch gears if I physically shift it (1-2-D) once in D when im goin about 50-60 and give it gas it sounds like it just revs from 1000-3500 rpm then itll actually move. Is this normal or does anyone have an idea as to whats up/what I did wrong.