SUBOTECH BG1535 H1 Hurtle HUMMER Repairing the Axles 

Done and done.

Any guide for upgrading the garbage powertrain? Mn's 390? 🤤 Looks like it didn't have enough space 😑

I would have replaced the whole axle with the WPL ones. I am disappointed in subotech for putting out such garbage. The BG1515 has way better axles than that, they should have used those instead of the JJRC junk plastic geared ones.