I too own an '83 TD with a bit of a sagging backend. I know for a fact that with the car loaded down, she won't raise up to level. I haven't played with anything underneath the car, but there is plenty of fluid in the resevoir. What is involved in replacing the "spheres"?
1994 MB E320 Coupe (199,500 mi)
1992 MB 190E 2.6 (173,000 mi)
1983 Porsche 911SC (148,000 mi)
2004 Volvo V70 2.5T (198,000 mi)
President of CT/Westchester Section