Since we know your 2014 Open Range 388RKS has 7k axles on it with 1/2 inch wheel studs we do have a kit to convert it to disc brake with the Hydrastar part # HSE7K-T1. This basically just replaces your hub/drums with hub/rotors and comes with everything else needed to make the conversion including the best actuator which is known to be the most reliable and also very quick reacting. view full answer...
The correct hub/drum for a Dexter 4,400 Lb Axle is the Trailer Hub and Drum Assembly part # 8-407-5UC3-EZ and then for the brakes you can use the Dexter Nev-R-Adjust Electric Trailer Brake Kit part # K23-478-479. view full answer...