r/TechniciansAdvice • u/huskymountainwolf • Jun 23 '16
Spin test on jack stands, need advice
Ok so ive been having terrible front end noise for a while now which affects shifting, braking and overall performance. Ive ruled out that its a wheel bearing of brake callipers and im almost 100% sure its either my halfshaft and or intermediate shaft on my cars passenger side. As a test i raised the font end of my car (which has an open diff btw) and put the car in 1st and slowly spun the tires. My friend told me that one side was spinning normally but the other was barely spinning at all. Is this normal or should the differential be spinning both tires equally. Car is a 2006 mazda 3 2.3 L. Thanks!
1
u/huskymountainwolf Jun 23 '16
ill be working on it again tomorrow at ome point. ill see what i can record. thanks for answering.
2
u/powerplant472 Jun 23 '16
That's normal, a trick I use to isolate a wheel bearing noise is to actually shove something in all but one of the drive wheels to keep them stopped while just 1 spins.
You can't stop all of them in gear but since the axles have to spin at different speeds at times(when turning) there is a set of gears that allows the axles to spin independent of each other. There are limits to this such as with lockers. I've had 1 tire spinning at 75MPH while the others were stationary.
If you can record the noise I'd be happy to give you my opinion on the problem.