I'm not sure this is the correct fix because the axles are at a 90 degree angle and they should be 22 t0 30 degrees.
MacRV, I recently installed a lift on my 8289 that FR sent for the same reasons some others on this thread have dealt with. From the beginning I talked with some people at a custom trailer fab and repair facility here in town that my dealer referred me to. I talked with them about the fact that the trailer runs at about 7500 on the axles and the axle rate is only 4000# each. His response was that that should be correct.
As far as the axle resting at 90° according to the info that Herk posted from Dexter referring to 4000# to 7200# axles they are designed to be at 22° to 35° when unloaded, 90° when loaded and -20° under shock. Mine does rest at 90° but with only 1 1/2 inches of starting clearance it does make contact with the wheel well.
With all that being said I am going to have mine at the repair facility in Millersburg In. the end of this month and this is one of the issues that I plan on talking with them about. I have the lift but if the axles are going to continue to relax I'm going to need more lift.
Jim, Julie and Rags the boss.
2015 Dodge CTD 3500 Bighorn pulling 2014 Wildcat 317RL. Life is good when spent with family and friends.