What would cause a 1992 Dodge Dakota to make grinding noise in 4hi and 4lo?

* Damaged transfer case: The transfer case is responsible for transferring power from the transmission to the front and rear axles. If it is damaged, it can make a grinding noise when you engage 4hi or 4lo.

* Low fluid levels: If the transfer case is low on fluid, it can also make a grinding noise.

* Damaged front axle: The front axle is responsible for driving the front wheels when you are in 4hi or 4lo. If it is damaged, it can make a grinding noise.

* Damaged rear axle: The rear axle is responsible for driving the rear wheels when you are in 4hi or 4lo. If it is damaged, it can make a grinding noise.