Thanks for the pictures! The Replacement Trunnion Spring Bar for Reese Weight Distribution System item # RP66009 is exactly what you need and I went ahead and attached a diagram below so you can compare the dimensions. view full answer...
From the info you listed your current axle seems to be a 4,400 lb axle with 95 inches from hub face to hub face but what I am unable to totally be sure on is the distance between the spring seat centers which is important for picking out an axle that will bolt up properly. The part # 6340624-EB that you referenced matches the overall length and is a higher capacity at 5,200 lbs but it has a spring seat to seat dimension of 80 inches which you would need to measure on your axle to be sure... view full answer...