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Old 10-22-2011, 04:28 PM   #16
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Start with what you changed. Are the ceramic balls the exact same diameter as the steel ones you took out? Check with verniers if necessary.
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Old 10-22-2011, 05:27 PM   #17
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Originally Posted by HarryLeach View Post
Does it matter which tire you hold? no, either one causes it to back off.

Before you buy new diff halves, I would try vibra-tite or some other non-hardening screw lock compound. It would really suck to spend the money and have it make no difference. I tried locktight yesterday and it had not impact on it.

I know I asked once already, but both ball bearings are good? Center pulley bearing and the thrust side diff half bearing? yes, all bearing are smooth as silk.

Something really screwy is going on, I've never had this problem with any TC ball diff, even if the locking insert for the screw was borderline wore out.
i agree, the only thing I can say for sure was it all started when I installed ceramic balls and thrust bearings. But all are checked and show the right size?
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Old 10-22-2011, 05:28 PM   #18
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Originally Posted by Radio Active View Post
Start with what you changed. Are the ceramic balls the exact same diameter as the steel ones you took out? Check with verniers if necessary.
I have not checked those. But I'm going back out now and will rebuild the diff with all metal parts back like it was before this started and see what happens.
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Old 10-22-2011, 06:57 PM   #19
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Default ceramic ain't that good

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I replaced my ball diff with ceramic balls and ceramic thrust bearing. Now it keeps loosening during a five minute run.

Does anyone know why? All the thrust washers and cone washers are in the right spot. The plastic piece is in the male side of the diff housing too and isn't stripped. I pulled it out and tested it with the screw and it won't thread all the way thru. I suppose it's tapered but the screw fits nice and tight.
I came to the realisation from building several 1/12 diffs, that ceramic diff balls are as much as a sin as a saint.

The reason for this is that they are incredibly hard wearing because they are just so damn hard, and they are smoother and more slippery than other diff balls.

I personally prefer tungsten carbide diff balls - harder, more consistent, and rounder than steel ones, not so hard as ceramin - they make the best diffs!
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Old 10-26-2011, 07:48 PM   #20
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Default Problem solved

Well my problem is finally solved. It was the female side of the diff. Order a new one and It fixed the problem.

Thanks for everyone's help.

JG
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