Hard to get in gear intermittently

[Waterloo]

And do not forget to replace the string gasket in the rear structure that the transmission bolts to... This always happens, most guys are not aware that there is an oil passage way that runs through that structure from the block. If not replaced and everything torqued to spec, in a few weeks or months that rear structure will be puking oil, and many times soaks the new clutch... Now you have to redo it all again, including purchasing a new clutch.

Bottom line, the shop you take the truck to needs to have the tool to line everything up when doing that rear structure. If they tell you it is fine, not to worry about replacing the string gasket, find another shop to do the work that understands the ISX.

Don't be a victim.