Hi there,
'06 SEV8 here with some unusual noise, and hoping for a few thoughts before dragging the beast in to the stealership! Started hearing some flap from the tires a few thousand miles ago (!), and figured it was just the winters wearing out - we'd been running Pirelli Scorpions winter tires through the summers for the last ~30k miles as I had read that many were successful this way - and they were so much quieter then the GYs! I checked for cupping when the noise started and noticed it some pretty significant cupping, so ignored the issue knowing that some new ATs were coming in the spring and I'd get an alignment after install. Had some Yoko Geolanders put on two days ago (installer said the Pirellis still had 8/32 in the good spots!) and the noise didn't much change! My wife seems to think it's a bit quieter, but I know think I here a bit of a "grind" in the noise (switching the tires removed a bit of the treble from the noise, which may have been masking the grind). Here's a list of symptoms:
1) regular low frequency noise - (similar to tire slapping, or running over rumble strips)
2) noise matches tire rotation and is probably worst around 50mph
3) noise louder when turning left, very slightly quieter turning right
4) almost disappears around 75mph (could be masked by wind/road noise)
5) brand new tires, but no alignment yet (previous were well cupped)
6) occurs both in 4hi/4lo - no change in frequency of hum - matches tire rotation speed
7) no change /w DSC on/off
8) all brakes same temp after playing (ie, don't think it's EPB drum - which has bound in the past, but was pretty obvious)
9) acceleration strong & smooth from all speeds - hasn't changed at all.
10) brakes replaced 5k miles ago (DIY - may have screwed something up? was pretty easy other then the stupid rear sensor location!)
Any thoughts are greatly appreciated!
Just took it for a drive - additional notes:
1) No change if I switch to neutral while driving - same frequency
2) Locked up the brakes at 40mph, and also did some gradual braking - no shimmy/shake from the steering wheel (ie, I'm doubting rotors)
3) Tire installer (from 2 days ago) was surprised at how little balancing was required on the rims when the new tires where put on - 2 rims required no weights at all - the other two where .5 ounces.
4) haven't yet had bushings done - no "clunking", but am likely overdue at 68k miles...
5) really sounds to me like running over very closely spaced rumble strips!
Is it possible I'm far enough out of alignment to cause the tires to rumble?
'06 SEV8 here with some unusual noise, and hoping for a few thoughts before dragging the beast in to the stealership! Started hearing some flap from the tires a few thousand miles ago (!), and figured it was just the winters wearing out - we'd been running Pirelli Scorpions winter tires through the summers for the last ~30k miles as I had read that many were successful this way - and they were so much quieter then the GYs! I checked for cupping when the noise started and noticed it some pretty significant cupping, so ignored the issue knowing that some new ATs were coming in the spring and I'd get an alignment after install. Had some Yoko Geolanders put on two days ago (installer said the Pirellis still had 8/32 in the good spots!) and the noise didn't much change! My wife seems to think it's a bit quieter, but I know think I here a bit of a "grind" in the noise (switching the tires removed a bit of the treble from the noise, which may have been masking the grind). Here's a list of symptoms:
1) regular low frequency noise - (similar to tire slapping, or running over rumble strips)
2) noise matches tire rotation and is probably worst around 50mph
3) noise louder when turning left, very slightly quieter turning right
4) almost disappears around 75mph (could be masked by wind/road noise)
5) brand new tires, but no alignment yet (previous were well cupped)
6) occurs both in 4hi/4lo - no change in frequency of hum - matches tire rotation speed
7) no change /w DSC on/off
8) all brakes same temp after playing (ie, don't think it's EPB drum - which has bound in the past, but was pretty obvious)
9) acceleration strong & smooth from all speeds - hasn't changed at all.
10) brakes replaced 5k miles ago (DIY - may have screwed something up? was pretty easy other then the stupid rear sensor location!)
Any thoughts are greatly appreciated!
Just took it for a drive - additional notes:
1) No change if I switch to neutral while driving - same frequency
2) Locked up the brakes at 40mph, and also did some gradual braking - no shimmy/shake from the steering wheel (ie, I'm doubting rotors)
3) Tire installer (from 2 days ago) was surprised at how little balancing was required on the rims when the new tires where put on - 2 rims required no weights at all - the other two where .5 ounces.
4) haven't yet had bushings done - no "clunking", but am likely overdue at 68k miles...
5) really sounds to me like running over very closely spaced rumble strips!
Is it possible I'm far enough out of alignment to cause the tires to rumble?
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