Hi guys, I've looked around and found symptoms on what causes what noises but I can't find anything on how to test the thrust bearing? I've got the gearbox out and don't know what its supposed to sound like or feel like?

 

As you currently have the box out, you may as well replace it for longevity, they're not expensive.

 

^ agreed. It's worth the hassle of not having to replace it if it's bad after you figure it out.

 

The thing is that I've got 2 throw out bearings and the one doesn't sound healthy and the other one sounds better when I turn them but I don't know what a new one is like so I can't really judge. I'm in SA so to import one would probably take 1-2 months and be close on 150$

 

As you rotate the bearing it should feel smooth free of any hang ups & grinding or harsh sounds.

 

Check with your local parts supplier. Not certain, but a chance that MAZDA used the same bearing on other models...i.e. their small truck. It might not take as long as you think to get one.

 

The bearing should rotate smoothly. There should be some friction as the bearing is sealed and the seals add a little drag, but under load you should feel no grittiness or roughness whatsoever in the rolling contact.

If one spins freely, take that as a sign the seals are worn out. The t/o bearings I've handled will all refuse to "spin" but can be easily rotated with my fingers.

David

 

Okay thanks for the replies guys!

Okay I see, the one t/o bearing spins extremely easily and would do a few rotations before it stops whereas the other one I have will only do about a 1/4 of a rotation before it stops and it feels less "dry". Thanks again!