I have posted a thread on traxxas or losi diffs...it amazes me how many people use traxxas diffs with no issues and how many rebuild them with endless issues!
I have more issues with the rear diff than the front...the only time my front diff has gone is when a bearing has collapsed and gone through the gears (ring and bevel [pinion]) or from hard bashing and landing from a height straight on my nose (spider gears only)
I have considered doing the losi conversion but don't feel I am quite there yet. After doing quite a bit of thinking this week and looking at mistercrash's conversion with the aluminium losi diff, I don't see why a (traxxas) aluminium diff case and cup wouldn't work.
When I examine my diff when it strips its always one side of the ring gear and sometimes with a few broken teeth or the teeth of the bevel (pinion) gear get bent, even with shimming this is happening. This to me looks like it is caused by flex in the plastic. If I think about this logically on how my rear diff is stripping it is normally when the rear diff is not under load ie when hard braking or leaving a jump and throttling in the air.
The shear brutal grunt of torque applied to the rear diff is amazing; I think the diff cup and diff housing by the centre drive gear connection are flexing and seem to me IMO the weak point of the diff. The other thing I have noticed which I think doesn't help is the play (slop) in the rear bulk head. When the diif and bulk head is full assembled I can move my drive shafts up and down and see about 2mm of play in each direction.
1. What would be a good recommendation of the diff case and cup as I only know of a couple of a couple hop up stores? Aluminium or steel, what are your thoughts?
2. Do you get hardened steel ring and bevel (pinion) gears as this would greatly improve the life of the diff?
3. Are there any recommendations on some heavy duty bearings for the diff?
4. Any suggestions on how to fix the play in the rear bulk head?