You can buy just the axle tube if that is what you are after. I had 2, 6,000# axle tubes shipped to my house by UPS. Yours are 3,500# under slung axles if they are not the rubber torsion axles.
Your camper has a drop axle set on it, that is if it is still original. Sunline ordered the under slung axles to lower the camper. The axle stubs are welded on at the Dexter or Alko factory and the correct toe angle is put into them during the welding process.
You stated you made it to the 4th axle and there was no easy lube. I had that too on a brand new axle. I was not pleased with Alko for doing this. They where closing a plant down at the time my axles where made and someone missed drilling the hole in the center. They did drill and tap for the grease fitting just it has no where to go.
If you have experience in drilling steel you can correct this yourself if you feel you can do it. I drilled my by hand before I installed it. Need a special 6" long drill bit and go slow and keep the chips cleaned out.
You need to lay out the cross drill hole to be in the exact right spot behind the inner bearing race but not in the seal outer ring area. It is not rocket science but it does take time and the right bit. Do not force it, the chips can bind and break the bit.
Hard the see the cross hole the light is shining off the axle
You can see the hole hear better
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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