I have a 1991 mazda miata with a metal on metal grinding sound coming from the rear end. the noise is noticable when in reverse from a stop. it is also noticable in first from a stop. if i push the clutch in it goes away. it is only under load that the noise happens. once the car is moving the noise goes away
Country: United StatesMake: MazdaModel: MX-5 MiataYear: 1991
Replaced rear calipers thought it might be brake shims but no luck anysuggestions
Hello!Because this vehicle is rear wheel drive, this noise is going to be most likely either in the read diff or one of the rear wheel bearings. However, if this noise stops when you push in the clutch, this is usually something related to the clutch/pressure plate or the output shaft bearing. The rule of thumb is it is a bad throwout bearing that causes this noise. But if the noise sounds like it comes from the rear end under a load, then this would be a bearing inside the differential. Of course, just be sure to check the rear wheel bearings.I hope this helps!
So here is the million dollar question...where would you start first to eliminate areas? obvious the easiest check first. how extensive is it to repair differential issues and throw out bearings? just trying to find out whether to tackle on my own or take it in.
Honestly, since you asked, I will tell you so please don't get upset with me. Because I am a mechanic, I would put it up in the air on the rack and bring the rear wheels up to 60 mph to see if the noise is present. If so, I would go underneath while having someone do this so I could pinpoint the noise. I would try ot see if the noise is in the transmission or the rear diff. Either which way, it may require some intensive labor to repair or rebuild (what ever the case) but at least this is a starting point. Next time your vehicle is in the shop for an oil change, have them run this test and see if they can pinpoint the noise for you. SInce it is already up in the air for the oil change, I don't think the would charge you much diagnostic time to do this..
ASE MASTER TECHNICIAN ADVANCED LEVEL SPECIALIST
Oh Well so much for do it yourself lol