Please compare to your original fan clutch before ordering. 1990 models had two options. A thread on style and a bolt on style. This is the bolt on style. For the thread on style, see item GPD-2911269.
If the fan clutch on your Dodge Turbo Diesel is not engaging correctly, it can cause the coolant temperature to rise above the normal operating temperature. When it is time to replace the fan clutch we offer this affordable aftermarket part that is a direct fit.