You would be correct. The R and RA models came zero manufacturer support whatsoever.
As far as XT,GT issues, we have had two XT's with issues. One had a faulty water pump that siezed, blew the belt. Soa sent us a longblock. (the old one was "thrown away") The other, I was a dumbass and used Royal Purple in my gearbox. Killed all the synchros and the front diff. I replaced all the synchros on my tab, and since I was in there I swapped the front and rear diff's to 3.90. Highway cruising is soooooooo much nicer now
$$$ outta my pocket, even though my district rep offered to pay for it.