parked my truck everything was fine truck...put it in the shop to put my tru-trac in got the rearend done 6 weeks later cause i've been workin 7 days a week went to drive it down the road an overdrive will not pull from a dead stop will pull after you get goin but slips badly 1st still works fine 2nd slips a lil and 3rd is pretty much dead...how does a trans go out when the truck is setting still...