3500 4x4 Pickup L6-359 5.9L DSL Turbo (1996)
Fluid - Transfer Case: Fluid Type Specifications
Recommended lubricant for all three transfer case models is Mopar Dextron II, or ATF Plus. Use this fluid for topping off the level, refilling after
service, or normal fluid changes.
Do not use anti-friction additives or similar products in the NV231/NV241 transfer cases. Use recommended lubricant only.