Originally Posted by mrfritz44
"You can see the old stuff come out the front of the hub and you know when you've done enough"
Actually, you need to use almost an entire grease cartridge to change ALL the grease in each hub, if you see new grease before that (like at the halfway point) you have a blockage and need to pull it apart
. I have been using these now for 8 seasons on two tandem axle trailers that I've pulled NJ-FL every year. I think they are the best thing since sliced bread!
Squirm, FWIW... If I were you and can't or won't inspect them thoroughly, I would have a good trailer shop go over those hubs'n'bearings and spend my money on something I know needs it, or something more funner than new trailer hubs!