904 shift kit problems

I have never seen this with a B&M kit only with the trans go kit,but anyways u r not useing the 5.0 kick down lever if so take it out use the 3.8 or 4.2 ratio ones or back off the band 1/2 turn more,whats happening is the high cluches are applying before the band is coming off thats the break feel you have it will burn the clutches out quick.recheck your steps.