Did you have any diff fluid in there? The front tires where huge and your pic of the diff looks like it's bone dry. If your just gonna bash with it then some 30k or higher silicone diff fluid will help control the power distribution and keep things lubricated so you don't destroy the diff. If you plan on racing then something between 10k and 30k will be better suited. I ran 10k in mine for racing and mixed 10k and 50k for bashing. I only ran 5s and it was on a lower kv motor but I never had any issues with the diffs
1. MBX-6 T8 1900KV, RX8 ON 4S
2. MBX-5T 1520, MMM ON 5S
3. MBX-5 ONROAD CONVERSION 1515, MMM ON 5S
4. MRX-3 ON ROAD CONVERSION 1512, MMM ON 6S
5. TEN T 2650 T8, MMP ON 3S