Name that noise

[jamesban]

Heres my brushless muggy. I just put new HD cups and diff gears in the front and rear with 10k oil. Im running a MM 2200 and its running 13/45 with a plastic spur on 4c A123. It makes a clicking sound when I throttle it for a few seconds. It's meshed properly but since the center diff was locked when I got it and Im guessing with this gearing, the locked diff and the plastic spur that the clicking is coming from the spur and pinion but Im only guessing? Im hoping its not coming from the new diffs? Can anyone here tell by the sound in the video? Anyway I plan to get the 45T delrin slipperential next payday so if its the spur it should solve that by having some slip I hope? Thanks. You can hear it around 7 seconds, 12 seconds and 40 seconds in the video

[YOUTUBE]http://www.youtube.com/watch?v=Kmxq1v1GrFw[/YOUTUBE]

http://www.youtube.com/watch?v=Kmxq1v1GrFw

[lutach]

I would double check everything again. See if there's any bent drive shaft or axles. See if any pins are worn out. Check your internal gears as I had a similar situation happen to me with non hardened HB diff gears. It could be something that catches some moving part(s) at times.

[bdebde]

Did you put new bearings in the diffs when replacing the gears?

[jamesban]

All of the diff gears were brand new although I dont think they were hardened just stock replacements, I built two new diffs with HD cups and they seemed very smooth after assembly, the center diff was locked with what looks like hot glue and I left it like that. The drive shafts and axles all appear straight. Im honestly not sure what it is. I had a similar noise in my brushlass e-savage when the stock plastic trans blew apaprt from the 9XL motor runnig on 6 cells. Other than that I never heard a noise like this. It doesnt sound like metal diff gears grinding to me? I may have to wait till soemthing fails to figure it out or if the slipperential makes it go away?

[jamesban]

I also used new mugen pins but I heard no diff pins are bulletproof in the muggy from this forum?

[jamesban]

Originally Posted by bdebde

Did you put new bearings in the diffs when replacing the gears?

Yep, rubber sealed abec 5

[bdebde]

If you did not replace the bearing with the diff gears, then that could be the problem. The only diff parts that wear out in my Muggy are the bearings on the rear diff pinion. Then the gears can slide past each other under hard acceleration as the pinion deflects because of the wear in the bearings. Check it out.

[jamesban]

I used new bearings and shimmed them. I hate to take it all apart again but I guess I might have to?

[bdebde]

Plastic or aluminum diff cases? If plastic, are they new?

[jamesban]

Originally Posted by bdebde

Plastic or aluminum diff cases? If plastic, are they new?

brand new aluminum