I've never seen shims for end float in a T series.
It's just housing, then slide in the axle and bearing and clamp the bearing down with the bearing retainer plate.
Could it be that your axles are too long and rubbing something in the diff centre. I've heard that non-LSD axles (T18 etc) need to have 5mm or so ground off when used with an LSD centre. Did they slide in "easily" all the way?
Hen