Hey Nicholas, so you are correct the Dexter 4.4k brake assemblies do not work with Lippert axles but we do have a solution that does work with the part # LC66WD which is a self adjusting Lippert assembly set that does fit the Lippert 4,400 lb trailer axles. view full answer...
I do have some other options for you as Reese does not offer any replacement spring bars for the larger 12,000LB # RP66560 or 14,000LB Steadi-Flex weight distribution hitches. They only offer the Spring Bar # RP58501 for the 400-600lb tongue weights which is not compatible with the larger hitch heads.
We do have the Fastway e2 weight distribution hitches which allow you to use several different spring bars with the same hitch. Here is a list of the different hitches and weight bars.
250-600lbs... view full answer...