[guesswatidrive]

hello all just a lil question for ya, i am doin a auto to manny swap on my 2001 v6, and i have everything almost done i just need to get the driveshaft in, now when i try to put it in, it goes in about 1in. then stops and will not go any farther, i've tried all 28 splines putting it in, but if i go and put it in the auto it will go rite in. Am i missing sumthing is the driveshaft too thick for the manny? it like hits the case of the tranny after the seal. Any input would be appreciated thanks