Sounds like a tyre rubbing (but its not)
Posted: Sun Feb 15, 2009 12:33 am
Hi Guys,
I seem to have developed a strange noise coming from the passenger side rear. It's a rotational noise (i.e. gets faster and slower), most noticeable at low speed and sounds like a tyre rubbing (but its not) ... kinda like a chhhhh ... chhhhh ... chhhhh. Seems to be worse on left handers, sometimes disappears on right handers, and is intermittent in a straight line (sometimes but not always depending on previous corner).
I can't reproduce it in the garage, and I am fairly sure its not wheel bearings (more of a rumble noise) or CV's (more of a clack clack).
I first noticed it about 30 mins into a Sat AM drive a couple weeks ago. Upon inspection I noticed that the hub drive pegs on this side have been replaced at some stage with a tapped and threaded version. These were about 5mm longer than those on the other side (originals). I could also get a high tech feeler gauge (the thin end of a cable tie) inbetween the hub and the inside of the rim.
Thinking this was most likely the issue (although no idea why it just started to make itself apparent) I shortened these to the same size as the originals, and went for a test drive this morning. Initially the noise was gone, but after about 30 mins of driving it re-appeared. Very annoying.
Upon checking with my feeler gauge I couldn't get any gap between hub and rim on 3 of 5 pegs .... and a very small gap on the other 2. I ~think~ this is caused by a small shoulder on the pegs between the threaded end and the smooth peg end.
Removing the pegs and turning them down is a PITA, but can be done if this is the issue. Recently I have rebuild the diff and had the entire rear drive line apart, repacked the CV's, re-torqued all the nuts and bolts etc, and have had 700 trouble free miles since.
Very open to any other ideas/suggestions or confirmations that I am on the right track.
Thanks
Andrew
I seem to have developed a strange noise coming from the passenger side rear. It's a rotational noise (i.e. gets faster and slower), most noticeable at low speed and sounds like a tyre rubbing (but its not) ... kinda like a chhhhh ... chhhhh ... chhhhh. Seems to be worse on left handers, sometimes disappears on right handers, and is intermittent in a straight line (sometimes but not always depending on previous corner).
I can't reproduce it in the garage, and I am fairly sure its not wheel bearings (more of a rumble noise) or CV's (more of a clack clack).
I first noticed it about 30 mins into a Sat AM drive a couple weeks ago. Upon inspection I noticed that the hub drive pegs on this side have been replaced at some stage with a tapped and threaded version. These were about 5mm longer than those on the other side (originals). I could also get a high tech feeler gauge (the thin end of a cable tie) inbetween the hub and the inside of the rim.
Thinking this was most likely the issue (although no idea why it just started to make itself apparent) I shortened these to the same size as the originals, and went for a test drive this morning. Initially the noise was gone, but after about 30 mins of driving it re-appeared. Very annoying.
Upon checking with my feeler gauge I couldn't get any gap between hub and rim on 3 of 5 pegs .... and a very small gap on the other 2. I ~think~ this is caused by a small shoulder on the pegs between the threaded end and the smooth peg end.
Removing the pegs and turning them down is a PITA, but can be done if this is the issue. Recently I have rebuild the diff and had the entire rear drive line apart, repacked the CV's, re-torqued all the nuts and bolts etc, and have had 700 trouble free miles since.
Very open to any other ideas/suggestions or confirmations that I am on the right track.
Thanks
Andrew