No history on this truck, replaced the rear diff fluid with Amsoil 75w-140 (SVO). This truck shows to have a Dana 11RG rear diff. This one is used as a cattle feed truck, has a replacement bed with cattle hopper installed. Only leaves the ranch to pickup feed and refill with gas. They are putting about 1k a year on the truck.
![97_C3500_Gear.jpg](https://lh3.googleusercontent.com/-jVXcLuGzdkE/T9tWLB7baiI/AAAAAAAAKuo/IREnteIQb_U/s800/97_C3500_Gear.jpg)