Section 1585 (68RFE Automatic Transmission - (Service Information) - 2500 Hd): Clutch: Cleaning
WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Clean the overrunning clutch assembly, and low-reverse clutch retainer. Dry them with compressed air after cleaning.