I have a constant whne going down the road with foot on the gas. Back off and it quiets up. At 2-3 MPH i think i can here a " tick- tick". Took the drive shaft off, wheels off ground, cover off and oil out. Spin wheel and i can hear a tick - tick, i THINK around the pinion bearing. NO play up and down or in and out, but it appears to have 2-3 times the backlash i would expect. I used the screw driver- stethiscope--- still think its the bearing. This is a 9.75 axle. What kind of luck would i have pulling the yoke off and going in from the front without removing axles halfs and ring gear ? I thought i had read that here before. Never done one that way .
If it's anyone of the trucks listed under your name. The axle really needs rebuilt with that many miles on it. Ring and Pinion, seals, spider gears, all bearings and C clips if it has them. You can buy complete rebuilt ones too. I think Jasper has them. You don't want to keep throwing parts into it. Unless the person know what they are doing. You can chew parts up in 50 or less miles. Then your back to square one. Still broke!