Mine failed between 150-175K
After I got my 4runner home I parked it until I replaced the LBJ. Did not want to have a similar story to tell. The drive from CO to SD was a little nerve wracking as the vehicle had 133k and a lift kit. Made it no problem but you are correct, it is a weak point and any used vehicle from these years should have them replaced ASAP unless proof of OEM replacement can be verified.