LN700 with 4,500 Lb springs (1985-1986)
LN700 (1987-1995)
L, LT, LN, LNT, LS, LTS, LL and LTL 800/900 (1970-1995)
Aeromax Series LA, LTA, LLA and LTLA 800/900 with 52" springs (1988-1995)
Some Aeromax use 58" full taper springs
First design springs were used before serial no. W40,001 (mid year 1975)
Second design springs were used from serial no W40,001 (mid year 1975)