Whats that sound?
#1
Rennlist Member
Thread Starter
Whats that sound?
Loosened parking brake cable, greased sway bar bushing, no luck. Coming from drivers rear wheel or axle. Verified tire isn't rubbing, only does it under weight load, not when jacked up and free spinning.
#2
Sounds like an early stage wheel bearing failure to me - will manifest itself when the wheel carrier is under load more so than when it's free spinning without the weight of the car.
Have you made sure your lugs are properly torqued - does it change when you load up one side of the car vs. the other (when turning)? Did you check the CV joints/axles?
Have you made sure your lugs are properly torqued - does it change when you load up one side of the car vs. the other (when turning)? Did you check the CV joints/axles?
#3
Rennlist Member
Thread Starter
Just checked, goes away when turning left, a little worse when turning right. Torqued the lugs to 96 yesterday but will double check. Maybe I missed a wheel.
#5
Rennlist Member
Thread Starter
Lugs are tight.
#6
From my experience that indicates it's either a wheel not sufficiently attached or the bearing. Brakes aren't manipulated by side to side load like the wheel is. Most likely your wheel wasn't seated well and just needs to be re-torqued.
#7
Rennlist Member
Really difficult to tell from the video on my phone but, I'd guess one of the ball joints in the suspension (coffin/control arm or track arm). Shoot a little wd or grease through the rubber boot and see if it goes away. If it does, replace the offending part as the grease/ lube won't last long.
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#9
Rennlist Member
Thread Starter
#10
Rennlist Member
That's a classic symptom that a left wheel bearing is going bad. When you put load on the bearing, the noise gets worse. So, if the bad bearing is on the left side of the car and you turn left, the weight shifts to the right side of the car and off the bearing on the left side. Hence, the grinding sound lessens. When you turn right, the weight shifts to the left side of the car, putting load on the bad bearing and making the sound worse.
#11
Rennlist Member
Thread Starter
Is the wheel bearing a dealer only or auto parts item?
#12
Rennlist Member
The wheel bearings are not a "dealer only" part. I just did two fronts on mine a few months ago. They're priced from $45 - $90 ea. Kind of a pain in the butt to do, but not a difficult job. There are a few DIY's - the tools are essential...and put the bearings in the freezer overnight before installing.
#13
Rennlist Member
Thread Starter
Ok. Track day tomorrow, nobody has one in stock locally. Do I drive it like it is, Lube it somehow, steal a wheel bearing off my silver car, or abort and not take it tomorrow?
#14
Race Director
Swapping carriers might be an easier operation than trying to steal the bearing from your other car as long as both cars use the same port. I'm not sure you'd get the "good" bearing out without damaging it; if you swap out carriers, you avoid that mess entirely.
#15
Rennlist Member
Thread Starter
That's a good idea. I can swap carriers without messing up the alignment, right?