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 4,400 lb trailer axle is an oddball when it comes to replacement parts but the easy solution is that you'd need 3,500 lb replacement assemblies like the part # AKEBRK-35-SA for a set of left and right hand assemblies that are self adjusting. While the assembly states that it was for a 3,500 lb trailer axle the great thing is that as long as the sizes and bolt pattern match up (like they do) they will work great. The only real difference between brake assembly capacities when the sizes... view full answer...
If you are in need of a replacement lead leg for your Venture vmc900r you'd want the part # LG-177202 or for a follow leg part # LG-177201. The lead leg is the one you'd attach the crank handle to and the follow leg is the leg that is opposite of that one. 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...