The rear axel blues!

Posted by steve-52/200 On 2016/6/7 14:28:25

Several trips to the garage ,the left rear axel keeps migrating outward ,,it'll scrape against the brake drum
First time we thought it was rubbing on the drum so relieved the drum edge with a die grinder and added axel shims but this didn't work
Then the axel actually migrated out sideways luckally the fender skirt held it in ,I st that point replaced the brearings and seals ,noticed the outer end of the axel was chewed up,
Replaced with good used axel , noted that there is a keyway and a key in the axel which requires adjustment on assembly .
Opon reassembly still doing the scraping noise
I checked and there's plenty of clearance between the wheel and fenders
The noise is best heard at very slow speeds with the window open and driving near a wall which reflects the noise
Could this be in the differential?
The mechanic isn't old enough to know what the deal is , and I'm too ignorant he thinks he didn't adjust the keyway holding in the axel right
Any advice?