Welcome to iRV2 .
Sorry your first post is about problems .
If the one end moves with the hydraulic ram , have you tried getting help to push the other end in ; or move the hydraulic driven end in slightly and rotate the reaction drive shaft with a wrench ?
If do get the slide in , remember to block the slide in , to prevent movement during travel .
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.