I had the steering rack rep-laced on our 95 TS 3800 about 3-4 months ago.
There is about 130k miles on vehicle now. I would think that 15 years is a long time on a steering rack.
Our radiator has had a leak about 3 inches from the top for at least 7 years.
Works fine even when down a few inches. I tried the aluminum powder repair, and probably clogged my rear heater system which required alot of engine flushing last year. ......Still a great vehicle that withstands the sands of time! KEV