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Hi all! First post here, hopefully I don't say anything to upset or offend! I recently purchased a 6x6 custom crawler off a chap, as a do up type project. It came initially with a cheapish Banggood brushless system which made it go like the clappers but it was pretty awful at low speed crawling, which, to be fair, may also be down to the fact that it has a slipper clutch. I bought an HPI 55t motor and HPI SC-3SWP3 crawler spec ESC, excitedly fitted it all to the truck, plugged in my 2S lipo, took it to my local crawling spot and........... instantly failed to get over a tree root that my TT02 would have no issues crawling over. I picked it up over the root, and as soon as it was on the flat, it seemed okay, until I noticed a horrendous smell, which I realised was the motor, which had also reached untouchable temperatures. Frustrated, I chose to return to the car and put the 6x6 away, and continue with my friends, and we picked our brains wondering why the truck had failed so much. I should mention that the truck weighs around 3.5kg, which is no means light, but it isn't too much heavier than my old Trailwalker crawler, and that was excellent (my friend now owns it). After we got back to the car park, my friend plugged his 3S lipo into the truck, and the truck seemed to perform a little bit better, but the motor was still very hot. The gearing on the truck is an 18t pinion gear and a 56t spur gear, powered by (as mentioned) a 55t motor, and a 2S, 5500 mAh lipo. I took the electronics out of the truck, and have been running them without any load for roughly 30 mins, and the motor has stayed cool and the shafts (apologies if this isn't the correct term) that would drive the wheels continue to turn, even when I try and stop the with my hands. What could the issues possibly be? Is the truck simply too big to be powered with a 2s lipo? Should I bother buying completely new electronics or rather buy a 4x4 kit and keep the truck as a shelf queen? TIA!

As per the title, I'm after an Axial SCX10ii UMG10 6x6.