I put the E maxx Tires on with 4S Lipo. Here's a taste of what it's doing.
Second vid looks scrunched. I think the aspect ratio got changed somehow.
I think I need to shim the rear diff, pinion to ring. I believe I heard it pop a few times. It sounds like the pinion is skipping a tooth when I jump and land.
What shims do I use?
I think the aluminum diff cup is a good idea also. The plastic one must be flexing and allowing this to happen.
Bullet Proof Diffs are a must. I won't run it on 6S until I get this fixed.
Overall, it seems to be working very well.