mike, if the u joint is attached to the rear of the xtrfr and it has a splined shaft i don't know, maybe 8" long, also attached, that shaft just slips into the end of the propeller shaft. it is meant slide a bit to allow for varying distances between the rear axle and xtrfr case. this distance varies as the suspension flexes usually when crawling over extreme terrain.
what were ya doing when it fell apart?
'64 Series IIA 88 Canvas Tilt
'68 Series IIA RHD Ambulance
'76 Spitfire 1500
'07 LR3 (Series Recovery Vehicle)